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`. SAN J OAQUI N LOCAL. HEALTH D I S TR I CT SAMPLING PROTOCAL 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 - 4 feet. If contamination is documented during closure an Unauthorized Release notification must be filled out and submitted to SJLND within 5 nays. Section 2652, CCR. WATER NOT PRESENT IN THE TANK PIT TANK SIZE Less than 1000 gallons 1000 - 10,000 gallons 10,001 gallons and up Piping MINIMUM NUMBER OF SOIL SAMPLES ONE per tank TWO per tank THTHREEOR MOREnk '0 LOCATION OF SOIL SAMPLES Fill or pump end of tank One at each.end of tank Ends and Middle or generally spaced along fhe length of the tank EVERY 20 LINEAL FEET WATER IS PRESENT IN TANK PIT TANK SIZE MINIMUM NO. OF SOIL SAMPLES LOCATION OF SOIL SAMPLES MINIMUM NUMBER OF WATER SAMPLES 10,000 GALLONS From wall next to FIVE per tank OR LESS 10,001 gallons and up tank eixis at soil/ Ends and Middle and (Single Tank) TWOgroundwater enerall spaced along ONE he length of the tank interface GREATER THAN From wall next to ONE 10,000 GALLONS tank ends.at soil/ ORgroundwater TANK CLUSTER FOUR interface OTHER SPECIAL GOND I T I ONS SLAB PRESENT IN TANK PIT Soil samples shall 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 - MINIMUM NUMBER OF SOIL SAMPLES LOCATION OF SOIL SAMPLES _ Less than 1000 gallons THREE per tank Center and ends or sides 1000 - 10,000 gallons FIVE per tank Center and ends or sides 10,001 gallons and up FIVE OR MORE per Ends and Middle and tank enerall spaced along he length of the tank EH 23 047 12/88 REVISED 1/89