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SAN J'OAQUIN LOCAL. HEALTH DISTRICT 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 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 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 tank ggenerallyy spaced along - _- _ _.z__ _ - _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 LESS tank ends at soil/ (Single Tank) TWO groundwater ONE interface ITER THAN From wall next to ONE 10,000 GALLONS tank erxjs.at soil/ OR groundwater TANK CLUSTER FOUR linterface OTHER S PEC I AL CONDITION S SLAB PRESENT IN TANK PIT Soil samples shall be obtained beneath the slab within native soils. Penetration through the obstruction will order oect the samples. s jcal removal of theobstrrucionwillthenllowsamplingacccordingtotheaboveccondition TANK SIZE MINIMUM NUMBER OF LOCATION OF SOIL SAMPLES 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 enerally spaced along ^Ne length_of the tank EH 23 047 12/88 REVISED 1/89