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SAMPLING PROTOCOL FOR ROUTINE TANK REMOVALS <br /> The following represents minimum sampling criterion required for closure compliance. Soil samples collected shall be representative <br /> of native soils beneath the tank's invert(tank's bottom)at a collection depth not to exceed 2-4 feet. If contamination is documented <br /> during closure,an Unauthorized Release Notification must be completed and submitted within five(5)working days pursuant to <br /> California Health&Safety Code,Section 25295. <br /> WATER NOT PRESENT IN TEE TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> <1,000 1 j2er Tank Fill OR Pum 2 End of Tank <br /> 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 I Sam ple every 20 lineal feet <br /> TANK&PIPING STOCKPILE SAWLES 2 Samples every 50 cubic yards <br /> WATER IS PRESENT INT PIT <br /> TANK TANK SIZE NENEVIUM NUMBER LOCATION of SOIL MINIMUM NUMBER <br /> (Gallons) of SOIL SAMPLES SAMPLES of WATER SAMPLES <br /> <10,000 2 from wall next to tank-ends <br /> Single Tank 3 at soiygroundwater interface I <br /> &I below tank <br /> > 10,000 OR 4 from wall next to tank ends <br /> Tank Cluster 5 or more at soil/groundwater interface <br /> I & I below each tank <br /> SLAB PRESENT IN THE TANK PIT <br /> Soil samples shall be obtained beneath the slab within native soils. Penetration through the obstruction will be required in order to <br /> collect the samples. (Physical removal of the obstruction will allow sampling according to the above conditions.) <br /> TANK TANK SIZE M[INEVIUM NUMBER LOCATION of SOIL SAMPLES <br /> (Gallons) of SOIL SAMPLES <br /> <1,000 3 per Tank Center and Ends OR Sides of Tank — <br /> 1,000- 10,000 5 per Tank Center and Ends OR Sides of Tank — <br /> >10,000 5 OR More per Tank Ends and Middle and generally spaced <br /> along the length of the Tank <br /> EH 23 046 (Revised 07/31/08) 7 <br />