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SAN JOAQU2 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 - 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. WATER NOT PRESENT IN THE TANK PIT TANK SIZE MINIMUM NUMBER OF LOCATION OF SOIL SAMPLES SOIL SAMPLES Less than 1000 gallons ONE per tank Fill or pump end of tank 1000 - 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 tankgenerally spaced along the length of the tank Piping _--- ONE — -- 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 tank ends at soil/ (Single Tank) TWO groundwater ONE interface 10,000 GALLONS THANKS From wall next to ONE tank ends at soil/ OR groundwater TANK CLUSTER FOUR interface OTHER SPECIAL COND I T I ONS SLAB PRESENT IN TANK PIT Soil samples shall be obtained beneath the slab within native soils. Penetration through obstructiontwillwthenballowusampling according toethetabovemconditionssjcal removal of the TANK SIZE - MINIMUM NUMBER OF LOCATION OF SOIL SAMPLES SOIL SAMPLES __ gallons THREE per tank -Center and ends or sides Less than 1000 � — 1000 - 10,000 gallons FIVE Der tank Center and ends or sides 10,001 gallons and up FIVE OR MORE per Ends and Middle and tank enerally spaced along the lengEh of the tank FH 23 097 12/88 - - REVISED 1/89