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hw� *Mw� SAN JOAQU I N LOC" -AL HEALTH D I S TR I CT SAMPLING pROTOCAL FOR ROUTINE TANK RE190VALS 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 hays. Section 2652, CCR. WATER NOT PRESENT IN THE TANK PIT TANK SIZE (MINIMUM NUMBER OF LOCATION OF SOIL SAMPLES - Less than 1000 gallons 1000 - 10,000 gallons 10,001 gallons and up N TANK SIZE 10,000 GALLONS OR LESS (Single Tank) GRTER THAN 10,0 0000 GALLONS OR TANK CLUSTER SOIL SAMPLES ONE per tank TWO per tank THREE OR MORE per tank M Fill or pump end of tank One at each end of tank Ends and Middle or generall spaced along the length of the tank EVERY 20 LINEAL FEET WATER IS PRESENT IN TANK PIT MINIMUM NO. OF SOIL SAMPLES kVNI LOCATION OF SOIL SAMPLES From wall next to tank ends at soil/ groundwater interface From wall next to tank ends at soil/ groundwater interface OTHER SPECIAL GOND I T I ONS MINIMUM NUMBER OF WATER SAMPLES ONE ONE SLAB PRESENT IN TANK PIT Soil samplesshall be obtained beneath the slab within native soils. Penetration through 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 EH 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 generall spaced along the length of the tank