COMPLIANCE INFO_1986-2000 - Laserfiche WebLink

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• &• Groundwater Wells 2b) Undisturbed soil samples shall be taken from exploratory boring/borings drilled for the purpose of installing (a) ground water monitoring well(s).. Borings should be drilled to a depth such that the base of the boring is a minimum of 20 feet below the base of the perennial water table or 15 feet below the base of the tank/tanks, whichever is lower. The borings shall be located on the perimeter of the tank cluster as is shown on the attached site sketch. 3b) Soil samples shall be taken at 5 foot intervals, in the zone above the water table. All samples shall be properly sealed, labeled, and preserved until they can be analyzed to determine the presence of any possibly hazardous substances that are present or have been stored in the tank/tanks. Soil sampling and testing shall be carried out as outlined in Section 2645 of the Underground Storage Tank Regulations. 4b) If the soil samples obtained are determined to be free of hazardous material the ground water monitoring well/wells shall be installed as specified in Section 2647 and 2648 of the Underground Storage Tank Regulations. Ground water samples shall be collected and analyzed semi-annually, at a minimum. 5) Pipeline leak detection requirements can be accomplished by visual inspection since the method of product delivery is by suction pump. Monitoring shall be as described in Appendix II of the Underground Storage Tank Regulations. If pumps are of the submersible type, pipeline leak detectors of the type described in the appendix to this report will be required. 6) Tank integrity testing to determine that total product loss from the tank does not exceed 0.05 gallons per hour, shall be performed yearly. Integrity testing shall be carried out as described in Section 2543 of the Underground Storage Tank Regulations.