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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-to 4-feet. If <br /> contamination is documented during closure, an Unauthorized Release Notification must be completed and submitted within <br /> five(5)working days pursuant to California Health&Safety Code, Section 25295. <br /> WATER NOT PRESENT IN THE 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 /> 02/03 1,000 - 10,000 2 per Tank 1 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 /> 02/03 PIPING SOIL SAMPLES 1 1 sample every 20 lineal feet <br /> 02/03 TANK&PIPING STOCKPILE SAMPLES 12 samples every 50 cubic yards <br /> WATER IS PRESENT IN THE TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION of MINIMUM NUMBER of <br /> # (Gallons) of SOIL SAMPLES SOIL SAMPLES WATER SAMPLES <br /> From wall next to tank <br /> 02/03 < 10,000 2 ends at soil/groundwater 1 <br /> Single Tank interface <br /> From wall next to tank <br /> > 10,000 OR 4 ends at soil/groundwater 1 <br /> Tank Cluster interface <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 <br /> order to 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 per Tank Center and Ends OR Sides of Tank <br /> D'z J3 1,000- 10,000 5 per Tank Center and Ends OR Sides of Tank <br /> 5 or More Ends and Middle and generally spaced <br /> > 10,000 per Tank along the length of the Tank <br /> EH 23 047 Page 7 <br />