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:f.g fi -- 3 sE :.:�Tii< ..;. . F�ss✓.a: surv.:� .. � ar :f <br /> 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 - 4 feet. If <br /> contamination is documented during closure, an Unauthorized Release Notification must be completed and submitted within five (5) <br /> 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 ver Tank Fill OR End of Tank <br /> t� 1 ,000 - 109000 2 r Tank 1 at each End of Tank <br /> 3 > 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 /> PIPING SOIL SAMPLES 1 Sample eve 20 Zeal feet <br /> i <br /> TANK & PIPING STOCKPILE SAMPLES u tc yards <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION of SOIL MINIMUM NUMBER of <br /> # (Gallons) of SOIL SAMPLES SAMPLES WATER SAMPLES <br /> < 10,000 From wall next to tank <br /> Single Tank2 ends at soiU 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 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 MINIMUM NUMBER LOCATION of SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> < 11000 3 per Tank Center and Ends OR Sides of Tank <br /> 11000 - 10,000 5 per Tank Center and Ends OR Sides of Tank <br /> > 10,000 5 OR More per Tank Ends and Middle and generally spaced along <br /> the length of the Tank <br /> EH 23 046 (Revised 10/19/98) Page 7 <br />