Final California 2026 Integrated Report (303(d) List/305(b) Report)

Supporting Information

Regional Board 9 - San Diego Region

Water Body Name:	Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
Water Body ID:	CAC9011200020090505104552
Water Body Type:	Coastal & Bay Shoreline

DECISION ID	145382	Region 9
Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach

Pollutant:	Indicator Bacteria
Final Listing Decision:	List on 303(d) list (being addressed by USEPA approved TMDL)
Last Listing Cycle's Final Listing Decision:	List on 303(d) list (TMDL required list)(2020)
Revision Status	Revised
Sources:	A Source Unknown
TMDL Name:	Bacteria Impaired Waters I (creeks and beach shorelines)
TMDL Project Code:	169
Date TMDL Approved by USEPA:	06/22/2011
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.2 and 3.3 of the Listing Policy. Under these sections a single line of evidence is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant for REC-1. Eleven of the 181 samples exceed the GM threshold for Enterococci. Zero of the 18 samples exceed the SSM threshold for Fecal Coliform. Zero of the 78 samples exceed the GM threshold for Fecal Coliform. Six lines of evidence are available in the administrative record to assess this pollutant for SHELL. One hundred thirty out of 340 samples exceed the SHELL threshold (median) and 143 out of 340 exceed the SHELL threshold (10%) for Total Coliform. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of REC-1. However, there is sufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of SHELL. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Eleven of the 181 samples exceed the GM threshold for Enterococci, zero of the 18 samples exceed the SSM threshold for Fecal Coliform, zero of the 78 samples exceed the GM threshold for Fecal Coliform for the protection of REC-1, and this does not exceed the allowable frequency in Table 3.2 of the Listing Policy. One hundred forty-three out of 340 exceed the SHELL threshold for Total Coliform, and this does exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. The TMDL was approved by USEPA on 6/22/2011. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. While there is justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of SHELL, the San Diego Water Board considers this waterbody-pollutant combination lowest priority for TMDL development as the water quality objective for SHELL has been determined by the State Water Board to require updating. On December 3, 2019, the State Water Board adopted the 2019 Triennial Review of the Ocean Plan and identified as a high priority a project to consider amending the Ocean Plan to review and revise the existing shellfish harvesting total coliform objective. The State Water Board recognized that the current total coliform water quality objective may be unattainable, as exceedances of the standard were found to be common in reference-quality areas. Following the update of the water quality objective, this waterbody will be reassessed and reprioritized for TMDL development, if needed. The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective. This waterbody is being considered for placement on or removal from the CWA section 303(d) List under section 3.3 or 4.3 of the Listing Policy, as applicable, using the fecal coliform and enterococci objectives. In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to imp   DECISION ID 145382 Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   Pollutant: Indicator Bacteria Final Listing Decision: List on 303(d) list (being addressed by USEPA approved TMDL) Last Listing Cycle's Final Listing Decision: List on 303(d) list (TMDL required list)(2020) Revision Status Revised Sources: A Source Unknown TMDL Name: Bacteria Impaired Waters I (creeks and beach shorelines) TMDL Project Code: 169 Date TMDL Approved by USEPA: 06/22/2011 Impairment from Pollutant or Pollution: Pollutant   Regional Board Conclusion: This pollutant is being considered for placement on the CWA section 303(d) List under sections 3.2 and 3.3 of the Listing Policy. Under these sections a single line of evidence is necessary to assess listing status. Six lines of evidence are available in the administrative record to assess this pollutant for REC-1. Eleven of the 181 samples exceed the GM threshold for Enterococci. Zero of the 18 samples exceed the SSM threshold for Fecal Coliform. Zero of the 78 samples exceed the GM threshold for Fecal Coliform. Six lines of evidence are available in the administrative record to assess this pollutant for SHELL. One hundred thirty out of 340 samples exceed the SHELL threshold (median) and 143 out of 340 exceed the SHELL threshold (10%) for Total Coliform. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of REC-1. However, there is sufficient justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of SHELL. There is sufficient justification to place it in the Being Addressed portion of the CWA 303(d) List because a TMDL has been completed and approved by RWQCB and USEPA and is expected to result in attainment of the standard. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. Eleven of the 181 samples exceed the GM threshold for Enterococci, zero of the 18 samples exceed the SSM threshold for Fecal Coliform, zero of the 78 samples exceed the GM threshold for Fecal Coliform for the protection of REC-1, and this does not exceed the allowable frequency in Table 3.2 of the Listing Policy. One hundred forty-three out of 340 exceed the SHELL threshold for Total Coliform, and this does exceed the allowable frequency listed in Table 3.2 of the Listing Policy. 4. The TMDL was approved by USEPA on 6/22/2011. 5. Pursuant to section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met. While there is justification for placing this water segment-pollutant combination on the CWA section 303(d) List for impairment of SHELL, the San Diego Water Board considers this waterbody-pollutant combination lowest priority for TMDL development as the water quality objective for SHELL has been determined by the State Water Board to require updating. On December 3, 2019, the State Water Board adopted the 2019 Triennial Review of the Ocean Plan and identified as a high priority a project to consider amending the Ocean Plan to review and revise the existing shellfish harvesting total coliform objective. The State Water Board recognized that the current total coliform water quality objective may be unattainable, as exceedances of the standard were found to be common in reference-quality areas. Following the update of the water quality objective, this waterbody will be reassessed and reprioritized for TMDL development, if needed. The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective. This waterbody is being considered for placement on or removal from the CWA section 303(d) List under section 3.3 or 4.3 of the Listing Policy, as applicable, using the fecal coliform and enterococci objectives. In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy. For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four pact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy. For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four percent exceedance frequency, the data must be collected from coastal beaches from April 1 through October 31 only.   Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.   State Board Review of Regional Board Conclusion and Recommendation: The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective. This waterbody is being considered for placement on or removal from the CWA section 303(d) List under section 3.3 or 4.3 of the Listing Policy, as applicable, using the fecal coliform and enterococci objectives. In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy. For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four percent exceedance frequency, the data must be collected from coastal beaches from April 1 through October 31 only.   State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.   Listing Extent:     Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233468   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 60 Number of Exceedances: 0   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 0 of the 60 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCD Temporal Representation: The samples were collected between the days of 2010-09-01 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233467   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 248 Number of Exceedances: 3   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 3 of the 248 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCD Temporal Representation: The samples were collected between the days of 2010-09-01 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: Regional Board Decision Recommendation: After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should be placed on the section 303(d) list because applicable water quality standards are exceeded and a pollutant contributes to or causes the problem.   State Board Review of Regional Board Conclusion and Recommendation: The Water Quality Control Plan for Ocean Waters (“Ocean Plan”) contains two bacteria water quality objectives applicable to the REC-1 beneficial use: a fecal coliform water quality objective and an enterococci water quality objective. This waterbody is being considered for placement on or removal from the CWA section 303(d) List under section 3.3 or 4.3 of the Listing Policy, as applicable, using the fecal coliform and enterococci objectives. In accordance with section 6.1.5.3 of the Listing Policy, data should be representative of the critical timing that the pollutant is expected to impact the waterbody. Indicator bacteria (total coliform, fecal coliform, E. coli, enterococci) populations may fluctuate substantially on a daily, seasonal, or yearly basis. Lacking constant inputs, they do not persist in the environment for a long period and effects are of relatively short duration. As a result, the historic levels of indicator bacteria in the waterbody may be a poor indicator of current risks to human health, particularly when more recent data are available to sufficiently assess the water quality standard. Additionally, water quality conditions in waterbodies may change as a result of management actions that have been implemented to address bacteria. Unrepresentative data may result in incorrectly placing or not placing a water body segment on the list, which could result in the unnecessary expenditure of public resources or missing a human health problem. Historic lines of evidence for data collected prior to 2010 were evaluated pursuant to these considerations and were not used to assess water quality standards attainment because they do not meet the temporal representation requirements of section 6.1.5.3 of the Listing Policy. For enterococci data, Listing Policy sections 3.3 and 4.3 instructs to use the binomial distribution table in sections 3.2 and 4.2, as applicable. To use the binomial table that uses a four percent exceedance frequency, the data must be collected from coastal beaches from April 1 through October 31 only.   State Board Decision Recommendation: After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.   Listing Extent:     233473valign="top" width="67%">QAPP for the Orange County Beachwatch data Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233468   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 60 Number of Exceedances: 0   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 0 of the 60 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCD Temporal Representation: The samples were collected between the days of 2010-09-01 and 2019-06-03 . Environmental Conditions:   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 74 Number of Exceedances: 44   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 44 of the 74 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCU Temporal Representation: The samples were collected between the days of 2010-11-03 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233475   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 12 Number of Exceedances: 12   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed Beach Watch data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and results are as follows: 12 of 12 samples exceed the criterion for Coliform, Total. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The California Ocean Plan states that at all areas where shellfish may be harvested for human consumption, not more than 10 percent of the samples shall exceed 230 per 100 mL. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233467   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 248 Number of Exceedances: 3   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 3 of the 248 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCD Temporal Representation: The samples were collected between the days of 2010-09-01 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233473   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 74 Number of Exceedances: 44   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Lag="top" width="33%">Spatial Representation: Data for this line of evidence for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek was collected at 1 monitoring site [ BROADWAY CREEK]. Temporal Representation: Data was collected over the time period 11/25/2008-10/27/2009. Environmental Conditions: QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s): Placeholder reference 2006 303(d)   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233471   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 248 Number of Exceedances: 74   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 74 of the 248 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCD Temporal Representation: The samples were collected between the days of 2010-09-01 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233472   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCU Temporal Representation: The samples were collected between the days of 2010-11-03 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233475   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 12 Number of Exceedances: 12   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed Beach Watch data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and results are as follows: 12 of 12 samples exceed the criterion for Coliform, Total. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The California Ocean Plan states that at all areas where shellfish may be harvested for human consumption, not more than 10 percent of the samples shall exceed 230 per 100 mL. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Data for this line of evidence for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek was collected at 1 monitoring site [ BROADWAY CREEK]. Temporal Representation: Data was collected over the time period 11/25/2008-10/27/2009. Environmental Conditions: QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s): Placeholder reference 2006 303(d)   Line of Evideth="33%">Number of Samples: 248 Number of Exceedances: 92   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 92 of the 248 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCD Temporal Representation: The samples were collected between the days of 2010-09-01 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233470   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 74 Number of Exceedances: 42   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 42 of the 74 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCU Temporal Representation: The samples were collected between the days of 2010-11-03 and 2019-06-03 . Environmental Conditions: QAPP Information: Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233471   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 248 Number of Exceedances: 74   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 74 of the 248 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCD Temporal Representation: The samples were collected between the days of 2010-09-01 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233472   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 248 Number of Exceedances: 92   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 92 of the 248 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29295   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 106 Number of Exceedances: 5   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 447 samples were collected and 106 monthly geomeans calculated. Of the 106 geomeans, five exceeded the geomean water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml; Geomean: Enterococcus density shall not exceed 35 per 100 ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29322   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 49 Number of Exceedances: 5   Data and Information Type: PWS pathogen monitoring (ambient water) Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCD Temporal Representation: The samples were collected between the days of 2010-09-01 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233470   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 74 Number of Exceedances: 42   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 42 of the 74 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCU Temporal Representation: The samples were collected between the days of 2010-11-03 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29295   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 106 Number of Exceedances: 5   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 447 samples were collected and 106 monthly geomeans calculated. Of the 106 geomeans, five exceeded the geomean water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml; Geomean: Enterococcus density shall not exceed 35 per 100 ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29322   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 49 Number of Exceedances: 5   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 449 samples were collected. Between March 2002 and December 2007, 49 samples were correlated with a storm event. Of the 49 samples, five exceeded the single sample maximum water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 449 samples were collected. Between March 2002 and December 2007, 49 samples were correlated with a storm event. Of the 49 samples, five exceeded the single sample maximum water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; Geomean: Fecal coliform density shall not exceed 200 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period. Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 31098   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 56 Number of Exceedances: 0   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Orange County collected Beach monitoring data within the time period from January 1999 through December 2006. A total of 56 monthly geomeans were calculated for data collected during the time frame of April 1st to October 31st (AB411 data) within the aforementioned time period. Of the 56 geomeans zero exceeded the geomean water quality objective. Data Reference: National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Geomean: Fecal coliform density shall not exceed 200 per 100ml within any 30 day period (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected at least once a week within the time period from January 1999 through December 2006. The data assessed is AB411 data which is data collected during the time frame of April 1st to October 31st (summer months) within the aforementioned time period. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75060   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 149 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: Zero of the 149 samples exceeded the fecal coliform objective. For this station, samples were collected from surfzone upcoast and surfzone downcoast. The results represent the higher of the two values. Data Reference: Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The single sample fecal coliform concentration shall not exceed more than 400/100ml. Water Quality Control Plan for Ocean Waters of California. Region 9 Basion Plan. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected from Laguna Canyon Channel(surfzone upcoast and surfzone downcoast). Temporal Representation: The samples were collected once a week from July 2006 to 2009. Environmental Conditions: QAPP Information: The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29320   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fracti="top" width="67%">Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; Geomean: Fecal coliform density shall not exceed 200 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period. Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 31098   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 56 Number of Exceedances: 0   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Orange County collected Beach monitoring data within the time period from January 1999 through December 2006. A total of 56 monthly geomeans were calculated for data collected during the time frame of April 1st to October 31st (AB411 data) within the aforementioned time period. Of the 56 geomeans zero exceeded the geomean water quality objective. Data Reference: National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Geomean: Fecal coliform density shall not exceed 200 per 100ml within any 30 day period (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected at least once a week within the time period from January 1999 through December 2006. The data assessed is AB411 data which is data collected during the time frame of April 1st to October 31st (summer months) within the aforementioned time period. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. None   Beneficial Use: Water Contact Recreation   Number of Samples: 449 Number of Exceedances: 10   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 449 samples were collected with 10 exceeding the single sample maximum water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; Geomean: Fecal coliform density shall not exceed 200 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29321   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 107 Number of Exceedances: 1   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 449 samples were collected with 107 geomeans calculated. Of the 107 geomean, only one exceeded the geomean water quality objective. Data Reference: National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; Geomean: Fecal coliform density shall not exceed 200 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collectedlign="top" width="33%">QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75060   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 149 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: Zero of the 149 samples exceeded the fecal coliform objective. For this station, samples were collected from surfzone upcoast and surfzone downcoast. The results represent the higher of the two values. Data Reference: Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The single sample fecal coliform concentration shall not exceed more than 400/100ml. Water Quality Control Plan for Ocean Waters of California. Region 9 Basion Plan. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected from Laguna Canyon Channel(surfzone upcoast and surfzone downcoast). Temporal Representation: The samples were collected once a week from July 2006 to 2009. Environmental Conditions: QAPP Information: The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29320   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 449 Number of Exceedances: 10   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 449 samples were collected with 10 exceeding the single sample maximum water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75062   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 35 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: Zero of the 35 geomeans exceeded the objective. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The standard for fecal coliform states that the coliform density shall not exceed 200 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected at the Laguna Main Beach site. Temporal Representation: Samples were collected from January 2008 to October 2009. Environmental Conditions: QAPP Information: The samples were collected for the beach watch program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75061   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 138 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: None of the 138 geomeans exceeded the fecal coliform objective. For this station, samples were collected fr   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; Geomean: Fecal coliform density shall not exceed 200 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29321   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 107 Number of Exceedances: 1   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 449 samples were collected with 107 geomeans calculated. Of the 107 geomean, only one exceeded the geomean water quality objective. Data Reference: National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Fecal coliform density shall not exceed 400 per 100 ml; Geomean: Fecal coliform density shall not exceed 200 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Data Reference: Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The geometric mean for fecal coliform shall not exceed more than 200/100ml. Water Quality Control Plan for the San Diego Basin. California Ocean Plan. Objective/Criterion Reference: Water Quality Control Plan for the San Diego Basin Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected from Laguna Canyon Channel at Main Beach (surfzone upcoast and surfzone downcoast). Temporal Representation: The samples were collected once a week from July 2006 to 2009. Environmental Conditions: QAPP Information: The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29326   Pollutant: Indicator Bacteria LOE Subgroup: Health Advisories Matrix: -N/A Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 2555 Number of Exceedances: 204   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: For the period from January 2000 to December 2006, there were and 204 beach postings days for this section of shoreline. Bacteriological samples are collected on a weekly basis at approximately 150 ocean and bay location in Orange County. When a bacteriological sample exceeds water quality standards, signs are posted indicating that waters have exceeded public health standards. Data and information on the number of beach posting were summarized by the County of Orange in their Annual Ocean and Bay Water Quality Report, March 2007. The reporting period was from January 2000 -December 2006. Data used was the number of days the beach was posting when the ocean or bay failed to meet the bacteriological standards. Data Reference: County of Orange. March 2007. Annual Ocean and Bay Water Quality Report, 2006   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Code of Regulations. Title 17, Section 7960. (a) When a public beach or public water-contact sports area fails to meet any of the standards as set forth in Section 7957 or 7958 above, the local health officer or the Department, after taking into consideration the causes therefor, may at his or its discretion close, post with warning signs, or otherwise restrict use of said public beach or public water-contact sports area, until such time as corrective action has been taken and the standards as set forth in 7957 and 7958 above are met. Objective/Criterion Reference: California Code of Regulations, Title 17, Section 7960   Evaluation Guideline: Guideline Reference:   Spatial Representation: Bacteriological monitoring samples were collected at Aliso Beach and South Laguna Beach in Orange County, California. Beaches included Emerald Bay, Crescent Bay, Laguna Main Beach, Hotel Laguna, Bluebird Canyon, Victoria Beach and Blue Lagoon. The posting covers 4.4 miles of beach shoreline. Temporal Representation: The beach poADDING-BOTTOM: 3px; WIDTH: 100%; text-align: left; PADDING-TOP: 3px; font-smooth: always">Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75062   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 35 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: Zero of the 35 geomeans exceeded the objective. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The standard for fecal coliform states that the coliform density shall not exceed 200 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected at the Laguna Main Beach site. Temporal Representation: Samples were collected from January 2008 to October 2009. Environmental Conditions: QAPP Information: The samples were collected for the beach watch program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75061   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 138 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: None of the 138 geomeans exceeded the fecal coliform objective. For this station, samples were collected from surfzone upcoast and surfzone downcoast. The higher of the two values was used for the geomean calculation. Data Reference: Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The geometric mean for fecal coliform shall not exceed more than 200/100ml. Water Quality Control Plan for the San Diego Basin. California Ocean Plan. Objective/Criterion Reference: Water Quality Control Plan for the San Diego Basin Objective/Criterion Reference: Environmental Conditions: QAPP Information: Samples were collected in compliance with County of Orange's Quality Assessment/Quality Control document (County of Orange, 2004). QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 30305   Pollutant: Indicator Bacteria LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Not Recorded   Beneficial Use: Water Contact Recreation   Number of Samples: 0 Number of Exceedances: 0   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. For the 2008 assessment , the 2006 listed coastline 'Pacific Ocean Shoreline, Laguna Beach HSA' was split into smaller segments that each represent an area near the sampling location of the data being assessed. This segment 'Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach' is one of the sampling locations. This LOE is a copy of the 2006 listing placeholder LOE for Pacific Ocean Shoreline, Laguna Beach HSA and is considered by the Regional Board to be applicable to this more specific segment formed from the split. Data Reference: Placeholder reference pre-2006 303(d)   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Unspecified Objective/Criterion Reference: Placeholder reference pre-2006 303(d)   Evaluation Guideline: Unspecified Guideline Reference: Placeholder reference pre-2006 303(d)   Spatial Representation: Unspecified Temporal Representation: Unspecified Environmental Conditions: Unspecified QAPP Information: Unspecified QAPP Information Reference(s): Placeholder reference pre-2006 303(d)   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 77626   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 35 Number of Exceedances: 0   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected from Laguna Canyon Channel at Main Beach (surfzone upcoast and surfzone downcoast). Temporal Representation: The samples were collected once a week from July 2006 to 2009. Environmental Conditions: QAPP Information: The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29326   Pollutant: Indicator Bacteria LOE Subgroup: Health Advisories Matrix: -N/A Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 2555 Number of Exceedances: 204   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: For the period from January 2000 to December 2006, there were and 204 beach postings days for this section of shoreline. Bacteriological samples are collected on a weekly basis at approximately 150 ocean and bay location in Orange County. When a bacteriological sample exceeds water quality standards, signs are posted indicating that waters have exceeded public health standards. Data and information on the number of beach posting were summarized by the County of Orange in their Annual Ocean and Bay Water Quality Report, March 2007. The reporting period was from January 2000 -December 2006. Data used was the number of days the beach was posting when the ocean or bay failed to meet the bacteriological standards. Data Reference: County of Orange. March 2007. Annual Ocean and Bay Water Quality Report, 2006   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Code of Regulations. Title 17, Section 7960. (a) When a public beach or public water-contact sports area fails to meet any of the standards as set forth in Section 7957 or 7958 above, the local health officer or the Department, after taking into consideration the causes therefor, may at his or its discretion close, post with warning signs, or otherwise restrict use of said public beach or public water-contact sports area, until such time as corrective action has been taken and the standards as set forth in 7957 and 7958 above are met. Objective/Criterion Reference: California Code of Regulations, Title 17, Section 7960   Evaluation Guideline: Guideline Reference:   Spatial Representation: Bacteriological monitoring samples were collected at Aliso Beach and South Laguna Beach in Orange County, California. Beaches included Emerald Bay, Crescent Bay, Laguna Main Beach, Hotel Laguna, Bluebird Canyon, Victoria Beach and Blue Lagoon. The posting covers 4.4 miles of beach shoreline. Temporal Representation: The beach posting covers the time frame of January 2000 -December 2006. Environmental Conditions: QAPP Information: Samples were collected in compliance with County of Orange's Quality Assessment/Quality Control document (County of Orange, 2004). QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Zero of the 35 samples exceeded the objective of 70 mpn/100ml applied as a rolling 30 day geomean. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The California Ocean Plan states that at all areas where shellfish may be harvested for human consumption, the median total coliform density shall not exceed 70 per 100 mL. Staff applied the objective as a rolling 30 day geometric mean consistent with other state bacteria objectives and with guidance from the National Shellfish Sanitation Program from which the objectives were taken. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach. Temporal Representation: The samples were collected from January 2008 through October 2009. Environmental Conditions: QAPP Information: The samples were collected for the beach watch program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29275   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 49 Number of Exceedances: 9   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 459 single samples were collected. Between March 2002 and December 2007, 49 samples correlated with a storm event. Of the 49 samples, nine exceeded the single sample water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: From the Ocean Plan, the median total coliform density shall not exceed 70 per 100 ml, and not more than 10 percent of the samples shall exceed 230 per 100 ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period. Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April throuft; PADDING-TOP: 3px; font-smooth: always">Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 30305   Pollutant: Indicator Bacteria LOE Subgroup: Pollutant-Water Matrix: Water Fraction: Not Recorded   Beneficial Use: Water Contact Recreation   Number of Samples: 0 Number of Exceedances: 0   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Unspecified--This LOE is a placeholder to support a 303(d) listing decision made prior to 2006. For the 2008 assessment , the 2006 listed coastline 'Pacific Ocean Shoreline, Laguna Beach HSA' was split into smaller segments that each represent an area near the sampling location of the data being assessed. This segment 'Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach' is one of the sampling locations. This LOE is a copy of the 2006 listing placeholder LOE for Pacific Ocean Shoreline, Laguna Beach HSA and is considered by the Regional Board to be applicable to this more specific segment formed from the split. Data Reference: Placeholder reference pre-2006 303(d)   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Unspecified Objective/Criterion Reference: Placeholder reference pre-2006 303(d)   Evaluation Guideline: Unspecified Guideline Reference: Placeholder reference pre-2006 303(d)   Spatial Representation: Unspecified Temporal Representation: Unspecified Environmental Conditions: Unspecified QAPP Information: Unspecified QAPP Information Reference(s): Placeholder reference pre-2006 303(d)   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 77626   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 35 Number of Exceedances: 0   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Zero of the 35 samples exceeded the objective of 70 mpn/100ml applied as a rolling 30 day geomean. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The California Ocean Plan states that at all areas where shellfish may be harvested for human consumption, the median total coliform density shall not exceed 70 per 100 mL. Staff applied the objective as a rolling 30 day geometric mean consistent with other state bacteria objectives and with guidance from the National Shellfish Sanitation Program from which the objectives were taken. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocgh October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29279   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 459 Number of Exceedances: 39   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 459 single samples with 39 samples exceeding the single sample water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: From the Ocean Plan, the median total coliform density shall not exceed 70 per 100 ml, and not more than 10 percent of the samples shall exceed 230 per 100 ml. Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75063   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples:   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach. Temporal Representation: The samples were collected from January 2008 through October 2009. Environmental Conditions: QAPP Information: The samples were collected for the beach watch program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29275   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 49 Number of Exceedances: 9   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 459 single samples were collected. Between March 2002 and December 2007, 49 samples correlated with a storm event. Of the 49 samples, nine exceeded the single sample water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: From the Ocean Plan, the median total coliform density shall not exceed 70 per 100 ml, and not more than 10 percent of the samples shall exceed 230 per 100 ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period. Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29279   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 459 Number of Exceedances: 39   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 459 single samples with 39 samples exceeding the single sample water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: From the Ocean Plan, the median total coliform density shall not exceed 70 per 100 ml, and not more than 10 percent of the samples shall exceed 230 per 100 ml. Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75063   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Shellfish Harvesting   Number of Samples: 58 Number of Exceedances: 3   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed Beach Watch data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and results are as follows: 3 of 58 samples exceed the criterion for Coliform, Total. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The California Ocean Plan states that at all areas where shellfish may be harvested for human consumpt"top" width="67%">58 Number of Exceedances: 3   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed Beach Watch data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and results are as follows: 3 of 58 samples exceed the criterion for Coliform, Total. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The California Ocean Plan states that at all areas where shellfish may be harvested for human consumption, not more than 10 percent of the samples shall exceed 230 per 100 mL. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Data for this line of evidence for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach was collected at 1 monitoring site [ LAGUNA MAIN BEACH] Temporal Representation: Data was collected over the time period 1/3/2008-10/27/2009. Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data. QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29319   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 49 Number of Exceedances: 1   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 459 samples were collected. Between March 2002 and December 2007, 49 samples were correlated with a storm event. Of the 49 samples, only one exceeded the single sample water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml; Geomean: Total coliform density shall not exceed 1,000 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through Decembion, not more than 10 percent of the samples shall exceed 230 per 100 mL. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Data for this line of evidence for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach was collected at 1 monitoring site [ LAGUNA MAIN BEACH] Temporal Representation: Data was collected over the time period 1/3/2008-10/27/2009. Environmental Conditions: Staff is not aware of any special conditions that might affect interpretation of the data. QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29319   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 49 Number of Exceedances: 1   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 459 samples were collected. Between March 2002 and December 2007, 49 samples were correlated with a storm event. Of the 49 samples, only one exceeded the single sample water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml; Geomean: Total coliform density shall not exceed 1,000 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period. Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific Environmental Conditions: Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period. Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 81135   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 17 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: Zero of the 35 geomeans collected during the AB411 period exceeded the objective. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The geometric mean standard for total coliform states that the coliform density shall not exceed 1000 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected at the Laguna Main Beach site. Temporal Representation: Samples were collected from April 2008 to October 2009. Environmental Conditions: QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75064   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 149 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: Zero of the 149 samples exceeded the total coliform objective. For these stations, samples were collected from surfzone upcoast and surfzone downcoast. The results represent the higher of the two values. Data Reference: Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The single sample total coliform concentration shall not exceed more than 10000/100ml. Water Quality Control Plan for Ocean Waters of California. Region 9 Basion Plan. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected from LB-3 and Mainbc, Laguna Canyon Channel (surfzone upcoast and surfzone downcoast). Temporal Representation: The samples were collected once a week from July 2006 to 2009. Environmental Conditions: QAPP Information: The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29317   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 459 Number of Exceedances: 3   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 459 samples were collected with three samples exceeding the single sample water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml; Geomean: Total coliform density shall not exceed 1,000 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   td colspan="2">  Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 81135   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 17 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: Zero of the 35 geomeans collected during the AB411 period exceeded the objective. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The geometric mean standard for total coliform states that the coliform density shall not exceed 1000 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected at the Laguna Main Beach site. Temporal Representation: Samples were collected from April 2008 to October 2009. Environmental Conditions: QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75064   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 149 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: Zero of the 149 samples exceeded the total coliform objective. For these stations, samples were collected from surfzone upcoast and surfzone downcoast. The results represent the higher of the two values. Data Reference: Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The single sample total coliform concentration shall not exceed more than 10000/100ml. Water Quality Control Plan for Ocean Waters of California. Region 9 Basion Plan. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected from LB-3 and Mainbc, Laguna Canyon Channel (surfzone upcoast and surfzone downcoast). Temporal Representation: The samples were collected once a week from July 2006 to 2009. Environmental Conditions: QAPP Information: The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29317   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 459 Number of Exceedances: 3   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 459 samples were collected with three samples exceeding the single sample water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml; Geomean: Total coliform density shall not exceed 1,000 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 31097   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	31097
Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	56
Number of Exceedances:	15
Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Orange County collected Beach monitoring data within the time period from January 1999 through December 2006. A total of 56 monthly geomeans were calculated for data collected during the time frame of April 1st to October 31st (AB411 data) within the aforementioned time period. Of the 56 geomeans 15 exceeded the geomean water quality objective.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Geomean: Total coliform density shall not exceed 1,000 per 100ml within any 30 day period (SWRCB, 2005).
Objective/Criterion Reference:	Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659.
Temporal Representation:	Samples were collected at least once a week within the time period from January 1999 through December 2006. The data assessed is AB411 data which is data collected during the time frame of April 1st to October 31st (summer months) within the aforementioned time period.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	75065
Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	138
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	None of the 138 samples exceeded the total coliform objective. For these stations, samples were collected from surfzone upcoast and surfzone downcoast. The higher of the two values was used for the geomean calculation.
Data Reference:	Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The geometric mean for total coliform shall not exceed more than 1000/100ml. Water Quality Control Plan for the San Diego Basin. Water Quality Control Plan for Ocean Waters.
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin
Objective/Criterion Reference:	California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected from Laguna Canyon Channel at Main Beach (surfzone upcoast and surfzone downcoast).
Temporal Representation:	The samples were collected once a week from July 2006 to 2009.
Environmental Conditions:
QAPP Information:	The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	29318
Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	108
Number of Exceedances:	0
Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 459 samples were collected and 108 geomeans calculated. None of the 108 geomeans exceeded the geomean water quality objective.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml; Geomean: Total coliform density shall not exceed 1,000 per 100ml (SWRCB, 2005).
Objective/Criterion Reference:	Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific
Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 56 Number of Exceedances: 15   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Orange County collected Beach monitoring data within the time period from January 1999 through December 2006. A total of 56 monthly geomeans were calculated for data collected during the time frame of April 1st to October 31st (AB411 data) within the aforementioned time period. Of the 56 geomeans 15 exceeded the geomean water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Geomean: Total coliform density shall not exceed 1,000 per 100ml within any 30 day period (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected at least once a week within the time period from January 1999 through December 2006. The data assessed is AB411 data which is data collected during the time frame of April 1st to October 31st (summer months) within the aforementioned time period. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75065   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 138 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: None of the 138 samples exceeded the total coliform objective. For these stations, samples were collected from surfzone upcoast and surfzone downcoast. The higher of the two values was used for the geomean calculation. Data Reference: Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The geometric mean for total coliform shall not exceed more than 1000/100ml. Water Quality Control Plan for the San Diego Basin. Water Quality Control Plan for Ocean Waters. Objective/Criterion Reference: Water Quality Control Plan for the San Diego Basin Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected from Laguna Canyon Channel at Main Beach (surfzone upcoast and surfzone downcoast). Temporal Representation: The samples were collected once a week from July 2006 to 2009. Environmental Conditions: QAPP Information: The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29318   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 108 Number of Exceedances: 0   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 459 samples were collected and 108 geomeans calculated. None of the 108 geomeans exceeded the geomean water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Total coliform density shall not exceed 10,000 per 100ml; Geomean: Total coliform density shall not exceed 1,000 per 100ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75066   Pollutant: Total Coliform LOE Subgroup: Pollutant-Water Matrix: Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	75066
Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	35
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Zero of the 35 geomeans exceeded the objective.
Data Reference:	Data for Region 9 Beach Watch.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The geometric mean standard for total coliform states that the coliform density shall not exceed 1000 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.
Objective/Criterion Reference:	California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at the Laguna Main Beach site.
Temporal Representation:	Samples were collected from January 2008 to October 2009.
Environmental Conditions:
QAPP Information:	The samples were collected for the Beach Watch program.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	29294
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	49
Number of Exceedances:	11
Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 447 samples were collected. Between March 2002 and December 2007, 49 samples were associated with a storm event. Of the 49 samples, 11 exceeded the single sample water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml; Geomean: Enterococcus density shall not exceed 35 per 100 ml (SWRCB, 2005).
Objective/Criterion Reference:	Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007.
Environmental Conditions:	Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period. Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March.
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	75036
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	149
Number of Exceedances:	5
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Five of the 149 samples exceeded the enterococcus objective. For this station, samples were collected from surfzone upcoast and surfzone downcoast. The results represent the higher of the two values.
Data Reference:	Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The single sample enterococcus concentration shall not exceed more than 104/100ml. Water Quality Control Plan for Ocean Waters of California. Region 9 Basion Plan.
Objective/Criterion Reference:	California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected from Laguna Canyon Channel (surfzone upcoast and surfzone downcoast).
Temporal Representation:	The samples were collected once a week from July 2006 to 2009.
Environmental Conditions:
QAPP Information:	The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program.
QAPP Information Reference(s):
Region 9      Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 35 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: Zero of the 35 geomeans exceeded the objective. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The geometric mean standard for total coliform states that the coliform density shall not exceed 1000 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected at the Laguna Main Beach site. Temporal Representation: Samples were collected from January 2008 to October 2009. Environmental Conditions: QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29294   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 49 Number of Exceedances: 11   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 447 samples were collected. Between March 2002 and December 2007, 49 samples were associated with a storm event. Of the 49 samples, 11 exceeded the single sample water quality objective. This information will not be used in determining a listing decision, but is of interest to the Regional Board and has been included here as additional anecdotal information. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml; Geomean: Enterococcus density shall not exceed 35 per 100 ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: Comparisons were made for all data and data associated with storm events. A storm event was defined as 0.2 inches of rainfall within a 72 hour period. Analyzing only storm water bacteria data is important because the majority of beach monitoring data covers the months of April through October. The data may not capture the full impacts of seasonal storm events and high bacteria levels due to storm water runoff because much of the wet season for Southern California occurs in November through March. QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75036   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 149 Number of Exceedances: 5   Data and Information Type: Not Specified Data Used to Assess Water Quality: Five of the 149 samples exceeded the enterococcus objective. For this station, samples were collected from surfzone upcoast and surfzone downcoast. The results represent the higher of the two values. Data Reference: Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The single sample enterococcus concentration shall not exceed more than 104/100ml. Water Quality Control Plan for Ocean Waters of California. Region 9 Basion Plan. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected from Laguna Canyon Channel (surfzone upcoast and surfzone downcoast). Temporal Representation: The samples were collected once a week from July 2006 to 2009. Environmental Conditions: QAPP Information: The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 29290   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	29290
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	447
Number of Exceedances:	23
Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 447 samples were collected with 23 exceeding the single sample maximum water quality objective.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report
	National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml; Geomean: Enterococcus density shall not exceed 35 per 100 ml (SWRCB, 2005).
Objective/Criterion Reference:	Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659.
Temporal Representation:	Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	31099
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	56
Number of Exceedances:	0
Data and Information Type:	PWS pathogen monitoring (ambient water)
Data Used to Assess Water Quality:	Orange County collected Beach monitoring data within the time period from January 1999 through December 2006. A total of 56 monthly geomeans were calculated for data collected during the time frame of April 1st to October 31st (AB411 data) within the aforementioned time period. Of the 56 geomeans zero exceeded the geomean water quality objective.
Data Reference:	Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	Geomean: Enterococcus density shall not exceed 35 per 100 ml within any 30 day period (SWRCB, 2005).
Objective/Criterion Reference:	Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659.
Temporal Representation:	Samples were collected at least once a week within the time period from January 1999 through December 2006. The data assessed is AB411 data which is data collected during the time frame of April 1st to October 31st (summer months) within the aforementioned time period.
Environmental Conditions:
QAPP Information:	Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document.
QAPP Information Reference(s):	County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	75038
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	35
Number of Exceedances:	0
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Zero of the 35 geomeans exceeded the objective.
Data Reference:	Data for Region 9 Beach Watch.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The geometric mean standard for entercoccus states that the entercoccus density shall not exceed 35 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.
Objective/Criterion Reference:	California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at the Laguna Main Beach site.
Temporal Representation:	Samples were collected from January 2008 to October 2009.
Environmental Conditions:
QAPP Information:	The samples were collected for the Beach Watch program.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Bea align="left" valign="top" width="33%">Number of Samples: 447 Number of Exceedances: 23   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Beach monitoring data was collected by the County of Orange from January 1999 through December 2007. A total of 447 samples were collected with 23 exceeding the single sample maximum water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   National Weather Service Forecast Office, San Diego, California, Chronological Regional Temperature and Precipitation Listings by Station   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Single Sample Maximum: Enterococcus density shall not exceed 104 per 100 ml; Geomean: Enterococcus density shall not exceed 35 per 100 ml (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected weekly from January 1999 through December 2007; however, rainfall data is only available from March 2002 through December 2007. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 31099   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 56 Number of Exceedances: 0   Data and Information Type: PWS pathogen monitoring (ambient water) Data Used to Assess Water Quality: Orange County collected Beach monitoring data within the time period from January 1999 through December 2006. A total of 56 monthly geomeans were calculated for data collected during the time frame of April 1st to October 31st (AB411 data) within the aforementioned time period. Of the 56 geomeans zero exceeded the geomean water quality objective. Data Reference: Ocean Bacteriological Data Evaluation for City of Laguna Beach, 1999 through 2006, Final Report   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: Geomean: Enterococcus density shall not exceed 35 per 100 ml within any 30 day period (SWRCB, 2005). Objective/Criterion Reference: Water Quality Control Plan Ocean Waters of California. California Ocean Plan 2005. Sacramento, CA: State Water Resources Control Board, California Environmental Protection Agency   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected from Main Beach, station id OLB00, in the Laguna HSA. Lat/Long: 33.54244/-117.78659. Temporal Representation: Samples were collected at least once a week within the time period from January 1999 through December 2006. The data assessed is AB411 data which is data collected during the time frame of April 1st to October 31st (summer months) within the aforementioned time period. Environmental Conditions: QAPP Information: Quality control for the bacteria analysis portion of this study was conducted in accordance with the County of Orange Quality Assessment/Quality Control document. QAPP Information Reference(s): County of Orange. Quality Assurance/Quality Control Manual, February 2004 Bacteria specific   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75038   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 35 Number of Exceedances: 0   Data and Information Type: Not Specified Data Used to Assess Water Quality: Zero of the 35 geomeans exceeded the objective. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The geometric mean standard for entercoccus states that the entercoccus density shall not exceed 35 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected at the Laguna Main Beach site. Temporal Representation: Samples were collected from January 2008 to October 2009. Environmental Conditions: QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s):   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 75037   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 138 Number of Exceedances: 7   Data and Information Type: Not Specified
LOE ID:	75037
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	138
Number of Exceedances:	7
Data and Information Type:	Not Specified
Data Used to Assess Water Quality:	Seven of the 138 geomeans exceeded the enterococcus objective. For this station, samples were collected from surfzone upcoast and surfzone downcoast. The higher of the two values was used for the geomean calculation.
Data Reference:	Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The geometric mean for enterococcus shall not exceed 35 MPN/100 mL. Water Quality Control Plan for the San Diego Basin. California Ocean Plan.
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin
Objective/Criterion Reference:	California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected from Laguna Canyon Channel at Main Beach (surfzone upcoast and surfzone downcoast).
Temporal Representation:	The samples were collected once a week from July 2006 to 2009.
Environmental Conditions:
QAPP Information:	The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	219939
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	12
Number of Exceedances:	0
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and the results are as follows: 0 of the 12 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): OLB00
Temporal Representation:	The samples were collected between the days of 2011-05-20 and 2015-03-02 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	219783
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): OLB00
Temporal Representation:	The samples were collected between the days of 2011-05-20 and 2015-03-02 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	233465
Pollutant:	Fecal Coliform
Data Used to Assess Water Quality:	Seven of the 138 geomeans exceeded the enterococcus objective. For this station, samples were collected from surfzone upcoast and surfzone downcoast. The higher of the two values was used for the geomean calculation.
Data Reference:	Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The geometric mean for enterococcus shall not exceed 35 MPN/100 mL. Water Quality Control Plan for the San Diego Basin. California Ocean Plan.
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin
Objective/Criterion Reference:	California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected from Laguna Canyon Channel at Main Beach (surfzone upcoast and surfzone downcoast).
Temporal Representation:	The samples were collected once a week from July 2006 to 2009.
Environmental Conditions:
QAPP Information:	The samples were collected and analyzed under the Quality Assurance Management Plan for The Orange County Stormwater Program. Coastal Stormdrain Outfall Monitoring Program.
QAPP Information Reference(s):
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	219939
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	12
Number of Exceedances:	0
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and the results are as follows: 0 of the 12 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): OLB00
Temporal Representation:	The samples were collected between the days of 2011-05-20 and 2015-03-02 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	2
Number of Exceedances:	2
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Two of the two geomeans exceeded the objective.
Data Reference:	Data for Region 9 Beach Watch.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The standard for fecal coliform states that the coliform density shall not exceed 200 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.
Objective/Criterion Reference:	California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at the Broadway Creek site.
Temporal Representation:	Samples were collected from November 2008 to October 2009.
Environmental Conditions:
QAPP Information:	The samples were collected for the beach watch program.
QAPP Information Reference(s):	Placeholder reference 2006 303(d)
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	233469
Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	18
Number of Exceedances:	0
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 0 of the 18 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): MAINBCU
Temporal Representation:	The samples were collected between the days of 2010-11-03 and 2019-06-03 .
Environmental Conditions:	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	219783
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	1
Number of Exceedances:	0
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and the results are as follows: 0 of the 1 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): OLB00
Temporal Representation:	The samples were collected between the days of 2011-05-20 and 2015-03-02 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	233465
Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	2
Number of Exceedances:	2
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Two of the two geomeans exceeded the objective.
Data Reference:	Data for Region 9 Beach Watch.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The standard for fecal coliform states that the coliform density shall not exceed 200 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.
Objective/Criterion Reference:	California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected at the Broadway Creek site.
Temporal Representation:	Samples were collected from November 2008 to October 2009.
Environmental Conditions:
QAPP Information:	The samples were collected for the beach watch program.
QAPP Information Reference(s):	Placeholder reference 2006 303(d)
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	233469
Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	18
Number of Exceedances:	0
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 0 of the 18 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a 30-Day rolling geomean.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the 30 day geometric mean of fecal coliform density not exceed 200 per 100 mL, calculated based on the five most recent samples from each site.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): MAINBCU
Temporal Representation:	The samples were collected between the days of 2010-11-03 and 2019-06-03 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
or:#CCCCCC; PADDING-RIGHT: 2%; PADDING-LEFT: 0%; FONT-WEIGHT: bold; PADDING-BOTTOM: 3px; WIDTH: 100%; text-align: right; PADDING-TOP: 3px; font-smooth: always">Region 9      Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233466   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 74 Number of Exceedances: 1   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 1 of the 74 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCU Temporal Representation: The samples were collected between the days of 2010-11-03 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233474   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 14 Number of Exceedances: 12   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Twelve of the 14 samples exceeded the objective. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The single sample maximum standard for entercoccus states that the entercoccus density shall not exceed 104 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected Broadway Creek. Temporal Representation: Samples were collected from November 2008 to October 2009. Environmental Conditions: QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s): Placeholder reference 2006 303(d)   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233462   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 28 Number of Exceedances: 5   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 5 of the 28 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCU Temporal Representation: The samples were collected between the days of 2010-11-03 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233466   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 74 Number of Exceedances: 1   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 1 of the 74 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCU Temporal Representation: The samples were collected between the days of 2010-11-03 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233474   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 14 Number of Exceedances: 12   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Twelve of the 14 samples exceeded the objective. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The single sample maximum standard for entercoccus states that the entercoccus density shall not exceed 104 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected Broadway Creek. Temporal Representation: Samples were collected from November 2008 to October 2009. Environmental Conditions: QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s): Placeholder reference 2006 303(d)   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 233462   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 28 Number of Exceedances: 5   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 5 of the 28 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCU Temporal Representation: The samples were collected between the days of 2010-11-03 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.   Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach   LOE ID: 219985   Pollutant: Fecal Coliform LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	219985
Pollutant:	Fecal Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	18
Number of Exceedances:	0
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and the results are as follows: 0 of the 18 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): OLB00
Temporal Representation:	The samples were collected between the days of 2011-05-20 and 2015-03-02 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	219876
Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Shellfish Harvesting
Number of Samples:	18
Number of Exceedances:	9
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and the results are as follows: 9 of the 18 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): OLB00
Temporal Representation:	The samples were collected between the days of 2011-05-20 and 2015-03-02 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	219957
Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Shellfish Harvesting
Number of Samples:	18
Number of Exceedances:	12
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and the results are as follows: 12 of the 18 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): OLB00
Temporal Representation:	The samples were collected between the days of 2011-05-20 and 2015-03-02 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	233463
Number of Samples:	18
Number of Exceedances:	0
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and the results are as follows: 0 of the 18 samples exceeded the water quality threshold for Coliform, Fecal. The water quality threshold is based on a Single Sample Maximum (SSM) value that is calculated daily.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the Single Sample Maximum fecal coliform density not exceed 400 per 100 mL.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): OLB00
Temporal Representation:	The samples were collected between the days of 2011-05-20 and 2015-03-02 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	219876
Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Shellfish Harvesting
Number of Samples:	18
Number of Exceedances:	9
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and the results are as follows: 9 of the 18 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold is based on a 10% exceedance rate that is calculated for a 30-Day peroid.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that not more than 10 percent of the total coliform samples shall exceed 230 per 100 mL.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): OLB00
Temporal Representation:	The samples were collected between the days of 2011-05-20 and 2015-03-02 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	219957
Pollutant:	Total Coliform
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Shellfish Harvesting
Number of Samples:	18
Number of Exceedances:	12
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach to determine beneficial use support and the results are as follows: 12 of the 18 samples exceeded the water quality threshold for Coliform, Total. The water quality threshold for shellfish is based on the median concentration of Total Coliform at each station, and is calculated as a 30-day rolling median.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the median total coliform density shall not exceed 70 per 100 mL.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): OLB00
Temporal Representation:	The samples were collected between the days of 2011-05-20 and 2015-03-02 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	233463
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	26
Number of Exceedances:	3
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSAd>
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	26
Number of Exceedances:	3
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 3 of the 26 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): MAINBCU
Temporal Representation:	The samples were collected between the days of 2010-11-03 and 2019-06-03 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	233461
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	75
Number of Exceedances:	11
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 11 of the 75 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): MAINBCD
Temporal Representation:	The samples were collected between the days of 2010-09-01 and 2019-06-03 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	233460
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	2
Number of Exceedances:	2
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Two of the two geomeans exceeded the objective.
Data Reference:	Data for Region 9 Beach Watch.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	The geometric mean standard for entercoccus states that the entercoccus density shall not exceed 35 per 100 mL. Water Quality Control Plan for Ocean Waters 2009.
Objective/Criterion Reference:	California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	Samples were collected Broadway Creek.
Temporal Representation:	Samples were collected from November 2008 to October 2009.
Environmental Conditions:
QAPP Information:	The samples were collected for the Beach Watch program.
QAPP Information Reference(s):	Placeholder reference 2006 303(d)
Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	233464
Pollutant:	Enterococcus
LOE Subgroup:	Pollutant-Water
Matrix:	Water
Fraction:	None
Beneficial Use:	Water Contact Recreation
Number of Samples:	154
Number of Exceedances:	8
Data and Information Type:	PATHOGEN MONITORING
Data Used to Assess Water Quality:	Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 8 of the 154 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly.
Data Reference:	Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly.
Objective/Criterion Reference:	SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019
Evaluation Guideline:
Guideline Reference:
Spatial Representation:	The samples were collected at 1 monitoring site(s), station(s): MAINBCD
Temporal Representation:	The samples were collected between the days of 2010-09-01 and 2019-06-03 .
Environmental Conditions:
QAPP Information:	QAPP for the Orange County Beachwatch data
QAPP Information Reference(s):	QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.

, at Broadway Creek to determine beneficial use support and the results are as follows: 3 of the 26 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCU Temporal Representation: The samples were collected between the days of 2010-11-03 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.  

Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria	Region 9
Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach

  LOE ID: 233461   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 75 Number of Exceedances: 11   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 11 of the 75 samples exceeded the Statistical Threshold Value (STV) water quality threshold for Enterococcus. The STV is based on a 10% exceedance rate that is calculated monthly. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a statistical value threshold (STV) of 110 cfu/100 mL. The STV shall not be exceeded by more than 10 percent of the samples collected in a calendar month, calculated in a static manner. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCD Temporal Representation: The samples were collected between the days of 2010-09-01 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.  

Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria	Region 9
Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach

  LOE ID: 233460   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 2 Number of Exceedances: 2   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Two of the two geomeans exceeded the objective. Data Reference: Data for Region 9 Beach Watch.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: The geometric mean standard for entercoccus states that the entercoccus density shall not exceed 35 per 100 mL. Water Quality Control Plan for Ocean Waters 2009. Objective/Criterion Reference: California Ocean Plan Water Quality Control Plan Ocean Waters of California 2009   Evaluation Guideline: Guideline Reference:   Spatial Representation: Samples were collected Broadway Creek. Temporal Representation: Samples were collected from November 2008 to October 2009. Environmental Conditions: QAPP Information: The samples were collected for the Beach Watch program. QAPP Information Reference(s): Placeholder reference 2006 303(d)  

Line of Evidence (LOE) for Decision ID 145382, Indicator Bacteria	Region 9
Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach

  LOE ID: 233464   Pollutant: Enterococcus LOE Subgroup: Pollutant-Water Matrix: Water Fraction: None   Beneficial Use: Water Contact Recreation   Number of Samples: 154 Number of Exceedances: 8   Data and Information Type: PATHOGEN MONITORING Data Used to Assess Water Quality: Water Board staff assessed data for Pacific Ocean Shoreline, Laguna Beach HSA, at Broadway Creek to determine beneficial use support and the results are as follows: 8 of the 154 samples exceeded the geomean water quality threshold for Enterococcus. This is a six week rolling geomean that is calculated weekly. Data Reference: Coastal Counties in Region 9 including: Orange, San Diego, and Los Angeles counties.   SWAMP Data: Non-SWAMP   Water Quality Objective/Criterion: California Ocean Plan (SWRCB 2019) states that the bacteria water quality objective to protect the REC-1 beneficial for all ocean waters for Enterococci is a geometric mean (GM) of 30 cfu/100 mL. The waterbody GM shall not be greater that the GM magnitude in any six-week interval, calculated weekly. Objective/Criterion Reference: SWRCB. 2005. Water Quality Control Plan, Ocean Waters of California (Ocean Plan). California Environmental Protection Agency, State Water Resources Control Board. February 2, 2019   Evaluation Guideline: Guideline Reference:   Spatial Representation: The samples were collected at 1 monitoring site(s), station(s): MAINBCD Temporal Representation: The samples were collected between the days of 2010-09-01 and 2019-06-03 . Environmental Conditions: QAPP Information: QAPP for the Orange County Beachwatch data QAPP Information Reference(s): QAPP for the Orange County Beachwatch data for the 2020 Integrated Report.  

DECISION ID	84166	Region 9
Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach

Pollutant:	Toxicity
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. One of the One samples exhibited water Toxicity. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of One samples exhibited water Toxicity and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:

Line of Evidence (LOE) for Decision ID 84166, Toxicity Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	74662
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Marine Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to test for toxicity. One of the one samples exhibited statistically and biologically significant toxicity. The toxicity tests that exhibited significant toxicity included Mysid biomass.
Data Reference:	Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control. Additionally, the biological significance of the sample was evaluted by determining whether the sample response was lower than the evaluation threshold.
Guideline Reference:	Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. EPA-821-R-02-012
Guideline Reference:	Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fourth Edition. U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-821-R-02-013
Spatial Representation:	The sample was collected at station LB-3u Laguna Canyon Channel.
Temporal Representation:	The sample was collected in February 2010.
Environmental Conditions:
QAPP Information:	The data collected under the Quality Assurance Management Plan for The Orange County Stormwater Program. The SWAMP measurement quality objectives were followed for toxicity data. The performance of toxicity bioassays and evaluation of reference toxicants were performed using USEPA and Standard Methods.
QAPP Information Reference(s):

DECISION ID	84166	Region 9
Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach

Pollutant:	Toxicity
Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)
Last Listing Cycle's Final Listing Decision:	Do Not List on 303(d) list (TMDL required list)(2016)
Revision Status	Original
Impairment from Pollutant or Pollution:	Pollutant
Regional Board Conclusion:	This pollutant is being considered for placement on the CWA section 303(d) List under section 3.1 of the Listing Policy. Under section 3.1 a single line of evidence is necessary to assess listing status. One line of evidence is available in the administrative record to assess this pollutant. One of the One samples exhibited water Toxicity. Based on the readily available data and information, the weight of evidence indicates that there is sufficient justification against placing this water segment-pollutant combination on the CWA section 303(d) List. This conclusion is based on the staff findings that: 1. The data used satisfies the data quality requirements of section 6.1.4 of the Policy. 2. The data used satisfies the data quantity requirements of section 6.1.5 of the Policy. 3. One of One samples exhibited water Toxicity and this sample size is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating. A minimum of 16 samples is needed to determine if a beneficial use is fully supported using table 3.1. 4. Pursuant to Section 3.11 of the Listing Policy, no additional data and information are available indicating that standards are not met.
Regional Board Decision Recommendation:	After review of the available data and information, RWQCB staff concludes that the water body-pollutant combination should not be placed on the section 303(d) list. The readily available data and information is insufficient to determine, with the power and confidence of the Listing Policy, the applicable beneficial use support rating.
State Board Review of Regional Board Conclusion and Recommendation:
State Board Decision Recommendation:	After review of this Regional Board decision, SWRCB staff recommend the decision be approved by the State Board.
Listing Extent:

Line of Evidence (LOE) for Decision ID 84166, Toxicity Region 9      Pacific Ocean Shoreline, Laguna Beach HSA, at Main Beach
LOE ID:	74662
Pollutant:	Toxicity
LOE Subgroup:	Toxicity
Matrix:	Water
Fraction:	None
Beneficial Use:	Marine Habitat
Number of Samples:	1
Number of Exceedances:	1
Data and Information Type:	TOXICITY TESTING
Data Used to Assess Water Quality:	One sample was collected to test for toxicity. One of the one samples exhibited statistically and biologically significant toxicity. The toxicity tests that exhibited significant toxicity included Mysid biomass.
Data Reference:	Data for Various Waterbodies in Region 8 and Region 9, 2006-2009.
SWAMP Data:	Non-SWAMP
Water Quality Objective/Criterion:	All waters shall be maintained free of toxic substances in concentrations that are toxic to, or that produce detrimental physiological responses in human, plant, animal, or aquatic life
Objective/Criterion Reference:	Water Quality Control Plan for the San Diego Basin
Evaluation Guideline:	Toxicity is defined as a statistically significant effect in the sample exposure compared to the control using EPA-recommended hypothesis testing. The t-test is used to determine if there is a statistically significant decrease in organism response in the sample as compared to the control. Additionally, the biological significance of the sample was evaluted by determining whether the sample response was lower than the evaluation threshold.
Guideline Reference:	Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fifth Edition. EPA-821-R-02-012
Guideline Reference:	Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms, Fourth Edition. U.S. Environmental Protection Agency Office of Water, Washington, DC EPA-821-R-02-013
Spatial Representation:	The sample was collected at station LB-3u Laguna Canyon Channel.
Temporal Representation:	The sample was collected in February 2010.
Environmental Conditions:
QAPP Information:	The data collected under the Quality Assurance Management Plan for The Orange County Stormwater Program. The SWAMP measurement quality objectives were followed for toxicity data. The performance of toxicity bioassays and evaluation of reference toxicants were performed using USEPA and Standard Methods.
QAPP Information Reference(s):