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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 <br /> representative of native soils beneath the tank's invert(tank's bottom)at a collection depth not to exceed 2-4 feet. If contamination <br /> is documented during closure, an Unauthorized Release Notification must be completed and submitted within five(5)working days <br /> pursuant to California Health&Safety Code,Section 25295. <br /> 000d tM WATER NOT PRESENT IN TBE TANK PTT <br /> CJl TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> < 1'000 1 r Tank Fill OR Pum End of Tank <br /> 1,000- 10, 2 r Tank 1 at each End of Tank <br /> > L0,000 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 le eve 20 lineal feet <br /> TANK&PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> �rWATER IS PRESENT IN TANK PIT <br /> rjj <br /> E MINIMUM NUMBER LOCATION of SOIL. <br /> of SOIL SAMPLES MINIMUM NUMBER <br /> SAMPLES of WATERSAMPLES <br /> 2 6om wall next to tank <br /> k 3 ends at soil/groundwaterinterface& I below tank1 OR 4 from wall next to rank <br /> terends at soil/groundwater <br /> 5 or more interface& 1 below each I <br /> 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 MINIMUM NUMBER LOCATION of SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> < 1.000 3 r Tank Cerner attd Ends OR Sides of Tank <br /> 11000- 10,000 5 r Tank Center a�Ends OR Sides of Tank <br /> > 10,000 5 OR More per Tank Ends and Middle and generally spaced <br /> Ion <br /> the length of the Tank <br /> i <br /> ER 23 046(Revised 08/13/99) page <br />