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UST Program - LG 113

UST Programs - LG 113

Issue Date: November 22, 1995
Revision Date: March 1, 2011

(originally listed as Marley Pump Co.)

Sonic Technology (ST) 1400-1800 Series Tank Monitoring System, ProLink System with Ultrasonic Network Card,
ATG Automatic Tank Gauging Monitor, LLM Series Liquid Level Monitor, FMS Fuel Management Monitor
(Ultrasonic Probe)


Certification Leak rate of 0.2 gph with PD = 99.9% and PFA = 2.98% for single tanks.
Leak rate of 0.2 gph with PD = 99.9% and PFA = 2.53% for manifolded tanks.
Leak rate of 0.1 gph with PD = 99.9% and PFA = 0.01%.
Leak Threshold 0.1 gph for leak rate of 0.2 gph. 
0.05 gph for leak rate of 0.1gph. 
A tank system should not be declared tight if the test result indicates a loss or gain that equals or exceeds this threshold.
Applicability Gasoline, diesel, jet fuel, biodiesel blends B6-B20 meeting ASTM D7467, biodiesel B100 meeting ASTM D6751*. Other liquids with known coefficients of expansion and density may be tested after consultation with the manufacturer.
*NWGLDE Listings apply to leak detection functionality only and not material compatibility - see "Disclaimer".
Tank Capacity

For leak rate of 0.2 gph:
Maximum of 73,530 gallons.
Maximum of 73,530 gallons cumulative capacity for manifolded tank systems with no more than 4 tanks in the system.
Tank must contain at least 15 inches of product.
For leak rate of 0.1 gph:
Maximum of 18,000 gallons. 
Tank must be minimum 95% full.

Waiting Time Minimum of 9.1 hours between delivery and testing for leak rate of 0.2 gph.
Minimum of 12 hours between delivery and testing for leak rate of 0.1 gph. 
None between dispensing and testing. 
There must be no delivery during waiting time.
Test Period Minimum of 2 hours, 20 minutes for a leak rate of 0.2 gph.
Minimum of 2 hours, 21 minutes for a leak rate of 0.1 gph.
Test data are acquired and recorded by system's computer. 
Leak rate is calculated from all data collected. 
There must be no dispensing or delivery during test.
Temperature Average for product is determined by five or more temperature sensors.
Water Sensor Must be used to detect water ingress. 
Minimum detectable water level in the tank is 0.112 inch. 
Minimum detectable water level change is 0.011 inch.
Calibration Temperature sensors and probe must be checked and, if necessary, calibrated in accordance with manufacturer's instructions.

Evaluated using both single and manifolded tank system with probes in each tank. The difference between the product level and groundwater level must be at least 2.75 feet if groundwater is present above the bottom of the tank. Tests only portion of tank containing product. 
As product level is lowered, leak rate in a leaking tank decreases (due to lower head pressure). 
Consistent testing at low levels could allow a leak to remain undetected. 
EPA leak detection regulations require testing of the portion of the tank system which routinely contains product. 
System was previously known as LT1 Automatic Product Level Monitor and was manufactured by Level Tech, Inc. (purchased by Marley 9/91).

California regulations require at least one test per month after routine product delivery or when the tank is filled to within 10% of the highest operating level of previous month. If the 0.1 gph test is used as a tank tightness test there must be no water present in the backfill (groundwater must be below the bottom of the tank), the tank must be equipped with an overfill protection device, and the product level in the tank must be at the overfill protection device set point. Local agency pre-approval is required. To use the 0.1 gph test as a monthly option see title 23 CCR Section 2643 (b)(2).



Evaluator:  ADA Technologies

125 Powder Forest Dr.

Tel:  (303) 792-5615

Simsbury, CT 06070-2003

Date of Evaluation:  09/25/92, 09/30/92

Tel: (860) 651-2700


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Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the performance of the method or equipment.
Equipment should be installed and operated in accordance with all applicable laws and regulations.
For full details, please refer to our expanded "DISCLAIMER" page.