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.2/2012006 12:49 2094640138 ENVIRONMENTAL t-ALTH PAGE 07/11 <br /> 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 THE TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> 4 (Gallons of SOIL SAMPLES <br /> < 1,000 I er Tank Fill OR ;ump End of Tank <br /> 000- 10 000 2 tt Tank n 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 /> [T9 r) PIPING SOIL SAMPLES I Sample every 20 lineal feet <br /> 13D TANK&PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION of SOIL MINIMUM NUMBER <br /> N (Gallons) of SOIL SAMPLES SAMPLES of WATER SAMPLES <br /> < 10,000 2 from wall noxi to tank. <br /> Single Tank 3 ends at soiVgroundwatcr I <br /> interface& I below tank <br /> 4 from wall next to lank <br /> > 10,000 OR ends at coil/groundwater <br /> Tank Cluster 5 or more interface& 1 below each 1 <br /> tank <br /> SLAB PRESENT IN THE TANK PIT <br /> Soil samples shill 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 /> p (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 Ccntcr 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 /> a E D Ert 612.M <br /> EH 23 046 (Revised 11/21/06) 7 <br />