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UST Program - LG 113

UST Programs - LG 113

Issue Date: November 22, 1995
Revision Date: March 10, 2000
 

PermAlert

PAL-AT Models AT20C, AT50C, AT40K with AGW Sensor Cable, TFH Hydrocarbon Sensor Cable

OUT-OF-TANK PRODUCT DETECTOR (LIQUID-PHASE)

Detector:

Output type

qualitative

Sampling frequency

continuous

Operating principle

impedance change

 

Test Results:

 

 

unleaded gasoline

 

AGW  Sensor Cable

1/3 MER*

1348 ft.

2/3 MER

2644 ft.

MER

3982 ft.

Response time (min)

9.92

6.25

21.28

Recovery time (min)

1.0

1.0

1.0

Product activation height (cm)

2.03

1.13

5.00

Detection length (cm)

116.3

64.8

286.1

Lower detection limits (cm)

 

 

 

   Product activation height

N/D*

N/D

5.1

   Detection length

N/D

N/D

295.6

 

 

TFH Hydrocarbon Sensor Cable

 

1/3 MER

1368 ft.

 

2/3 MER

2685 ft.

 

MER

4046 ft.

Response time (min)

3.40

7.48

16.21

Product activation height (cm)

0.65

1.33

3.53

Detection length (cm)

27.7

56.8

150.4

Lower detection limits (cm)

 

 

 

   Product activation height

N/D

N/D

3.

   Detection length

N/D

N/D

152.9

* See glossary.

Specificity Results (in addition to above):
Activated:  synthetic gasoline, diesel, heating oil #2, water (AGW Sensor Cable only).

Comments:
System can monitor interstitial spaces.
Evaluations also covered quantitative leak location.
AGW Sensor Cable is reusable.
TFH Hydrocarbon Sensor Cable is not reusable.
Lower detection limit is calculated at MER only.  Cable is assumed to be equally or more sensitive at shorter lengths.

California regulations require sensors to be tested annually to verify proper operation. The detector is not reusable and must be replaced after contact with hydrocarbons.

 

PermAlert

Evaluator:  Carnegie Mellon Research Institute

7720 N. Lehigh Ave.

Tel:  (412) 268-3495

Niles, IL 60714-3491

Date of Evaluation:  01/17/92, 02/11/92

Tel:  (847) 966-2235

 

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