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SAMPLING PROTOCOL FOR ROUTINE TANK REMOVALS <br /> The following represents minimum sampling cdtenon required for closure compliance. Soil samples.c ollected shat[be representative of <br /> native soils beneath the tank's invert(tank's bottom)at a collection depth not to exceed 2-4feet. tf contaminailon is:doc urnented <br /> during closure,an Unauthorized Release Notification must be completed and submitted within five(5)working days pursuant to <br /> California Health&Safety Code,Sectidn 25295. <br /> WATER NOT PRESENT IN THE TANK,FIT <br /> TANK TANK SIZE MINIMUM:NUMBER LOCATION OF SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> c 1.000 1 per Tank Fill OR Pump End of Tank <br /> 1,000-10,000 2 perTank 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 AiND:STOCKPILE <br /> PIPING SOIL SAMPLES 1 Sample eve 20 lineal feet <br /> TANK&PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER of LOCATION:of SOIL MINIMUM NUMBER of <br /> # (Gallons) SOIL SAMPLES SAMPLES WATER SAMPLES <br /> A 9Q,000 2 from wall next to tank <br /> Single Tank ends at e&II- clow tater <br /> nk 1 <br /> interface&1 below-tank <br /> 4 from wall next to tank <br /> >10,000 OR 5 or more ends'at sollfgroundwater 1 <br /> Tank Cluster interface&.1 below each <br /> tank <br /> SLAB PRESENT IN THE TANK PIT <br /> Soil tempt"shelf be obtained beneath the stab within native soils: Penetrationthrough 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 /> TAMC TANK SIZE MINIMUM NUMBER LOCATION of SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> <1,000 3 2,2rTank Center and Ends OR Sides of Tank <br /> 1;000-10,000 5 M'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 o the Tank <br /> Tri-Regional Recommendations <br /> Appendix A <br /> EH 23 046 (Revised 8/16/11) 6 <br />