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Issue Date: November 22, 1995
Revision Date: August 23, 1999
Praxair
Services, Inc.
(originally listed as Tracer Research Corp.)
Tracer
Tight
OUT-OF-TANK PRODUCT DETECTOR (VAPOR-PHASE)
Detector:
|
Output
type: |
quantitative |
|
Sampling
frequency: |
intermittent |
|
Operating
principle: |
chromatographic
(looks for chemical tracer) |
Test
Results:
|
|
xylene |
benzene |
2-methylbutane
|
unleaded
gasoline
|
chemical
tracers
|
|
Hydrocarbon
Detector (GC/FID)
|
|
|
|
|
|
|
Accuracy (%)
|
<20
|
<20
|
<20
|
<20
|
N/R*
|
|
Bias (%)
|
0
|
0
|
0
|
0
|
N/R
|
|
Detection time (sec)
|
<1
|
<1
|
<1
|
<1
|
N/R
|
|
Fall time (sec)
|
<1
|
<1
|
<1
|
<1
|
N/R
|
|
Lower detection limit (ppm)
|
20
|
20
|
20
|
20
|
N/R
|
|
Tracer
Detector
|
|
|
|
|
|
|
Accuracy (%)
|
N/R
|
N/R
|
N/R
|
N/R
|
<20
|
|
Bias (%)
|
N/R
|
N/R
|
N/R
|
N/R
|
0
|
|
Detection time (sec)
|
N/R
|
N/R
|
N/R
|
N/R
|
<1
|
|
Fall time (sec)
|
N/R
|
N/R
|
N/R
|
N/R
|
<1
|
|
Lower detection limit (ppm)
|
N/R
|
N/R
|
N/R
|
N/R
|
10-5
|
*
See glossary.
Manufacturer’s
specifications:
Soil permeability at the site
must exceed 1 Darcy.
Comments:
System utilizes a chromatographic
measurement of a vapor sample collected monthly from the site.
Hydrocarbon vapors and the added chemical tracer can be measured
independently.
During evaluations, the tracer chemical was declared 159 out of 161
trials.
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Praxair Services, Inc.
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Evaluator: Control Strategies Engineering (out of business)
|
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3755 N. Business Center Dr.
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Tel: Contact Praxair Services, Inc.
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Tucson,
AZ 85705
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Date
of Evaluation: 05/05/92
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Tel:
(800) 394-9929
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E-mail:
info@praxair.com |
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URL:
www.praxairservices.com
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