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SAMPLING PROTOCOL FOR ROUTINE TANK REMOVALS <br /> The followingrepresents 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 /> ' WATER NOT PRESENT IN TEE T.kNK PIT <br /> ' TANK TANK SIZE irIINIMUM, NUMBER LOCATION OF SOIL SAMPLES <br /> (Gallons) of SOIL SAMPLES <br /> < 1,000 I 1 oer Tank Fill OR Pum End of Tank <br /> 1.000 - 10,000 2 per Tank 1 at each End of Tank <br /> ' I > 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 /> I. <br /> PIPING SOIL SAMPLES 1 Sample every 20 lineal feet <br /> TANK & PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> ' WATER IS PRESENT IN TANK PTT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION of SOIL NUMBER <br /> ' (Gallons) of SOIL SAMPLES SAMPLES of WATER SAMPLES <br /> T < 10,C00 I 2 from wall next to rank <br /> ' I Single Tank 3 ends at soil/groundwater I <br /> interface& I below tank <br /> 4 from wall next to Lank <br /> ' > 10,000 OR ends at soil/groundwater 1 <br /> Tank Cluster 5 or more interface& 1 below eacfi <br /> tank <br /> SLAB PRESENT U N 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 MIYLbIUM NUMBER I LOCATION of SOIL SAMPLES <br /> i <br /> (Gallons) of SOIL SAMPLES <br /> ' I I < 1,000 3 per Tank I Center and Ends OR Sides of Tank <br /> I,C00 - 10.000 5 oer Tank I Center and Ends OR Sides of Tank <br /> ' I > 10.000 5 OR More per Tank I Ends and Middle and generally spaced <br /> along the length of the Tank <br /> EH 23 046 (Revised 08/13/99) Page 7 <br />