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E E SAN JOAQLJIN LOCAL. HEALTH DISTRICT SAMPLING PROTOCAL FOR ROUTINE TANK REMOVALS The following represents minimum sampling criter on required for closure compliance. Soil samples collected shall be representative of nat ve 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 Re ease 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 SOIL SAMPLES Less than 1000 gallons I ONE per tank ./ 1000 - 10,000 gallons TWO per tank 10,001 gallons and up THREE OR MORE per tank Piping ONE TANK SIZE 10,000 GALLONS OR LESS (Single Tank) GREATER THAN 10,000 GALLONS OR TANK CLUSTER WATER IS PRESENT MINIMUM NO. OF I LOC SOIL SAMPLES From tank TWO grou ante From tank grou FOUR intP OTHER SPECT AL COND I T I ONS SLAB PRESENT IN Soil samples shall be obtained beneath the slab the obstruction will be required in order to col obstruction will then allow sampling according t TANK SIZE (MINIMUM NUMBER OF SOIL SAMPLES LOCATION OF SOIL SAMPLES Fill or pump end of tank One at each end of tank Ends and Middle or generally spaced along the length of the tank EVERY 20 LINEAL FEET TANK PIT ON OF SOIL I MINIMUM NUMBER MPLES OF WATER SAMPLES 11 next to is at soil/ ater ONE ce 11 next to I ONE is at soil/ ANK PIT thin native soils. Penetration through ct the samples. (Physical removal of the the above conditions.] LOCATION OF 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 tankgenerally spaced along the length of the tank EH 23 047 12/88 REVISED 1/89