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SAN .7O2!LQUIN LOCAL HEALTH DI S [Ri c-r SAMPLING PROTOCAL FOR ROUTINE TANK REMOVALS MAR 3 1989 The following represents minimum sampling criterion required for closure compliance. Soil samples collected shall be representative of native sols 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 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 tan 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' -� J From wall next to — OR LESS tank ends at soil/ (Single Tank) TWO groundwater ONE interface GREATER THAN From wall next to ONE 10,000 GALLONS tank ends at soil/ OR groundwater TANK CLUSTER FOUR interface OTHER SPECIAL COND I T I ON S SLAB PRESENT IN TANK PIT 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 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 gleyysoctha=nn thengthegg EH 23 047 12/88 REVISED 1/89