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• SAN 70AQU3EN LOC L, iHE2�TH D2 S=3E C1T SAMPLING PROTOCAL FOR ROUTINE TANK REMOVALS The following represents minimum sampling criterion reguired for closure compliance. Soil samples collected shall be represen.ative 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 SJLHD within 5 days. Section 2652, CCR. r,ks e -Z 443 I/ WATER NOT PRESENT IN THE TANK PIT TANK SIZE MINIMUM NUMBER OF SOIL SAMPLES LOCATION OF SOIL SAMPLES Less than 1000 gallons ONE per tank Fill or pump end of tank 000 - 10,000 gallons TWO per tank One at each end of tank 10,001 gallons and up THREE OR MORE Ends and Middle or per tank enerall spaced along ?he length of tank GREATER THAN From wall next to the Piping ONE EVERY 20 LINEAL FEET WATER IS PRESENT IN TANK PIT TANK SIZE MINIMUM NO. OF LOCATION OF SOIL SOIL SAMPLES SAMPLES MINIMUM Ni1MBER OF WATER SAMPLES 101,000 GALLONS From wall next to Center and ends or sides OR LESS tank ends at soil/ Center and ends or sides (Single Tank) TWO groundwater ONE interface spaced along GREATER THAN From wall next to ONE 10,000 GALLONS tank ends.at soil/ OR groundwater TANK CLUSTER FOUR Interface (DrrRE R S1PHCIAr• GOND=TIC)NS SLAB PRESENT IN TANK PIT Soil samples shall be obtained beneath the slab within native soils. Penetration throwgh 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 tankgeneral] spaced along the length of the tank EH 23 047 12/88 REVISED 1/89