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r SAN aOAQUI N 1X:X:' L, HEALTH D= STE22 CT SAMPLING PROTOCAL FOR ROUTINE TANK REMOVALS The following represents minimum sampling criterion required for closure compliance. Soil i 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 i is documented during closure, an Unauthorized Release notification most be filled out and submitted to SJLHD vithin 5 days. Section 2652, CCR. WATER NOT PRESENT IN THE TANK PIT TANK SIZE MINIMUM NUMBER OF LOCATION OF SOIL SAMPLES SOIL SAMPLES Less than 1000 gallons ONE Fill or pump end of tank �� 9,gn�vYE 1000 - 10000 gallons TWO rto 4r 10,001 gallons and up THREE OR MORE Ends and Middle or per tank enerall spaced along ?he length of the tank ! Piping ONE EVERY 20 LINEAL FEET r WATER IS PRESENT IN TANK PIT TANKIZE MINIMUM NO. OF LOCATION OF SOIL MINIMUM NUMBER j SOIL SAMPLES S OF WATER SAMPLES 10,000 GALLONS rom wall next to OR LESS tank ends at soil/ (Single Tank) TWO groundwater interface GREATER THAN From wall next to ONE 10,000 GALLONS tank ends at soil/ OR groundwater TANK CLUSTER FOUR interface 1 OTHER SPECI AL GOND I T 2 ONS SLAB PRESENT IN TANK PIT i 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 LOCATION OF SOIL SAMPLES J SOIL SAMPLES i Less than 1000 gallons THREE per tank Center and ends or sides ' r 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 generall spaced along the length of the tank EH 23 047 12/88 REVISED 1/89