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SAN .70AQiJI3-T LOCAL, HEAIlTI-i DS STE2I CT SAMPLING PRO'I'OCAL FOR ROUTINE TANK REMOVALS The following represents minimum sampling criterion required for closure compliance. Soil samples collected shall be representative of native soils beneath the tank's invert [tank's bottom] at a collection depth not be exceed 2 - 9 feet. If contamination is documented during closure, an Unauthorized Release notification must be filled out and submitted to SJLHD within 5 days. Section 2652, CCR. TANK SIZE Less than 1000 gallons 1000 - 10,000 gallons 10,001 gallons and up MINIMUM NUMBER OF SOIL SAMPLES ONE per tank TWO per tank THREE OR MORE per tank 0 LOCATION OF SOIL SAMPLES Fill or pump end of tank One at each end of tank Ends and Middle or generally spaced along the length of the tank EVERY 20 LINEAL FEET WATER IS PRESENT IN TANK PIT TANK SIZE MINIMUM NO. OF LOCATION OF SOIL MINIMUM NUMBER SOIL SAMPLES SAMPLES OF WATER SAMPLES 10,000 GALLONS From wall next to OR LESS tank ends at soil/ (Single Tank) TWO groundwater ONE interface GREATER THAN From wall next to ONE 10,000 GALLONS tank ends at soil/ OR groundwater TANK CLUSTER FOUR interface OTFiIUR SPECIAL Cc3wniTI4oINS SLAB PRESENT IN TANK PIT Soil samples shall be obtained beneath the slab within native soils. Penetration througgh the obstruction will be required in order to collect the samples. [Physical removal of the obstruction will then allow sampling according to the above conditions.] TANK SIZE Less than 1000 gallons 1000 - 10,000 gallons 10,001 gallons and up EN 23 097 12/88 REVISED 1/89 MINIMUM NUMBER OF SOIL SAMPLES THREE per tank FIVE per tank FIVE OR MORE per tank LOCATION OF SOIL SAMPLES Center and ends or sides Center and ends or sides Ends and Middle and generally spaced along the length of the tank