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SAN .70AQUIN LOCAL TH 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 P I T 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 tankgenerall spaced along the length of the tank Piping ONE EVERY 20 LINEAL FEET WATER IS PRESENT IN TANK PIT F(Single ANK SIZE MINIMUM N0. OF LOCATION OF SOIL MINIMUM NUMBER SOIL SAMPLES _ SAMPLESOF WATER SAMPLES 000 GALLONS From wall next to - LESS tank ends at soil/ Tank) TWOgroundwater ONE interface G 00TER GALLONS From wall next to ONE OR tank ends.at soil/ roundwater TANK CLUSTER FOUR interface OTH�''R SPECIAL CONDITIONS SLAB PRESENT IN TANK PIT Soil samples shall be obtained beneath the slab within native soils. Penetration through ob6tructiontwillwthenallowusamplingoaccordingotoethetabovemcondltionss�cal removal of the 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 tank lir Ends and Middle and ?enerall spaced along he leng h of the tank EH 23 047 12/88 ^�-~ REVISED 1/89