Issue Date: November 22, 1995
Revision Date: May 7, 2007

Chapman Engineering

(originally listed as Environmental Fuel Systems, Inc.)

Fuel Finder Version IV

Out-of-Tank Product Detector (Vapor-Phase)

Detector

Output Type Quantitative
Sampling Frequency Intermittent
Operating Principle Adsorption sampling

*California regulations require vadose zone vapor monitoring to be continuous. This sensor does not meet the criteria.

Test Results

  Benzene 2-Methylbutane
Accuracy (%) [Avg. Reading] 106.8 [1647 ppm] 122.7 [1380 ppm]
Bias (%) 64.5 38.2
Precision (%) 22.3 53.2
Detection time N/A* N/A
Lower detection limit (ppm) 77 116

*See glossary.

Specificity Results

  Percentages
Benzene 147.7
n-butane 90.7
n-hexane 55.7
Isobutane 51.1
2-methylpentane 143.7
Toluene 66.5
  • Chapman Engineering
    P.O. Box 1305
    213 Commerce Street
    Boerne, TX 78066
    Tel: (800) 375-7747
  • Evaluator: Carnegie Mellon Research Institute
    Tel: (412) 268-3495
    Date of Evaluation: 04/20/93

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