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SAMPLING iPROTOCOL FOR ROUTINE TANK REM"AIS <br /> -itamination <br /> e following represents minimum sampling'criterion required for closure compliance. Soil samples collected shall be <br /> resentative of native soils beneath the tank's Invert (tank's bottom) at a collection depth not to exceed 2 - 4 feet. If <br /> Is documented during closure, an Unauthorized Release Notification must be completed and submitted <br /> within five (5) working days pursuant to California Health & Safety Code, Section 25295. <br /> WATER NOT PRESENT IN TRE TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> < 1,000 1 per Tank Fill OR Pump End of Tank <br /> 587 1,000 - 10,000 2 per Tank I at each End of Tank <br /> > 10,000 3 or More Ends and Middle OR generally <br /> per Tank spaced along the length of the Tank <br /> ' PIPING AND STOCKPILE <br /> PIPING SOIL SAMPLES <br /> X <br /> X1 Sample every 20 lineal feet <br /> TANK & PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> i <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION of SOIL MINIMUM NUMBER of <br /> # (Gallons) of SOIL SAMPLES SAMPLES WATER SAMPLES <br /> < 10,000 From wall next to tank <br /> Single Tank 2 ends at soli/groundwater ! <br /> Interface <br /> > 10,000 OR From wall next to tank <br /> Tank Cluster 4 ends at soil/ I <br /> groundwater interface <br /> I <br /> SLB PRESENT 1N THE TANK PIT <br /> Soil samples shall be obtained beneath the slab within native soils. Penetration through the obstruction will be required In <br /> r-der to collect the samples. (Physical removal of the obstruction will allow sampling according to the above conditions.) <br /> FTAN72 F(TI <br /> K S[ZEMINIMUM NUMBER LOCATION of SOIL SAMPLES <br /> oons) of 'SOIL SAMPLES <br /> < 1,000 3per Tank Center and Ends OR Sides of Tank <br /> 1,000 - 10,000 51 per Tank <br /> Center and Ends OR Sides of Tank <br /> 10,000 5 OR More per Tank Ends and Middle and generally spaced along <br /> the length of the Tank <br /> Ey' 23 047 (Revised 7/10/92) Page 7 <br /> L <br />