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• <br /> SAMPLING PROTOCOL FOR ROUTINE TANK REMOVALS <br /> Che following represents minimum sampling criterion required far 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 <br /> contamination is documented during closure, an Unauthorized Release Notification must be completed and submitted <br /> within five (5) working days pursuant to California Health & S<lfety Code, Section 25295. <br /> WATER No PRESENT IN THETANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> 1,000 1 er Tank Fill OR Pum End of Tank <br /> f 1 _ Ip pp0 ) 2 per Tattle 1 at each End of Tank <br /> ----------------------------- <br /> > 10,000 <br /> 3 or More Ends and Middle OR generally <br /> per Tank spaced along the length of the Tank <br /> PIPING AND S'1'OCKPIIX <br /> PIPING SOIL SAMPLES l 1 Sample every 20 lineal feet <br /> TANK& PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> WATER IS PRESENT IN TANK PIT <br /> 7TANK TANK SIZE MINIMUM NUMBER LOCATION of SOIL MINIMUM NUMBER of <br /> (Gallons) of SOIL SAMPLES SAMPLES WATER SAMPLES <br /> < 10,00(? From wall next to tank ° <br /> Single Tank 2 ends at soil/groundwater 1 <br /> interface <br /> > 10,000 OR from wall next to tank <br /> Tank Cluster 4 ends at soil/ 1 <br /> groundwater interface <br /> SLAB PRESENT IN TIIE'TANK PTT <br /> Sail 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 /> 7TANK 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 /> 1,000 • 10,000 5 per Tank Center and Ends OR Sides of Tank <br /> E--------------- <br /> > 10,000 5 OR More per'rank Ends ane! Middle and generally spaced along <br /> 111Q length of the Tank <br /> Ell 23 047 (Revised 7/10/92) Page 7 <br />