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`. <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 25'_95. <br />WATER NOT PRESENT IN THE T_--N-K PIT <br />TANK <br />TANK SIZE <br />MINIMUM NUMBER <br />I LOCATION OF SOIL SAMPLES <br />,YI�p <br />(Gallons) <br />of SOIL SAMPLES <br />(Gallons) <br />of SOIL SAMPLES <br />< 1.000 <br />1 oer Tank <br />I Fill OR Pumo End of Tank <br />< 10,000 <br />1.000 - 10.000 <br />I 2 per Tank <br />I 1 at each End of Tank <br />Single Tank <br />2 <br />I ends at soil/ groundwater <br />1 <br />> 10,000 <br />I 3 or More <br />I Ends and Middle OR generally <br />interface <br />per Tank <br />spaced along the length of the Tank <br />ND STOCKPILE <br />PIPING SOIL <br />^_0 <br />TANK & PIPING STOCKPILE SAMPLES I 2 Samples every 50 cubic yards <br />weTPR TC PRFSFN—r fN T.ANK PIT <br />SLAB PRESENT IN THE TANK PIT <br />Soil samples shall be obtained beneath the slab within native sails. Penetration through the obstruction will be required in order to <br />collect the samples. (Physical removal of the obstructicn will allow sampling according to the above conditions.) <br />TANK <br /># <br />TANK SIZE <br />I <br />MINIMUM NUMBER <br />, <br />LOCATION of SOIL <br />MINIMUM NUMBER of <br />TANK <br /># <br />(Gallons) <br />of SOIL SAMPLES <br />SAMPLES <br />WATER SAMPLES <br />I Center and Ends OR Sides of Tank <br />< 10,000 <br />> 10,000 <br />From wall next to tank <br />Ends and Middle and generally spaced along <br />he length of the Tank <br />Single Tank <br />2 <br />I ends at soil/ groundwater <br />1 <br />interface <br />> 10,000 OR <br />From wall next to tattle <br />Tank Cluster <br />I 4 <br />ends at soil/ <br />I <br />groundwater interface <br />SLAB PRESENT IN THE TANK PIT <br />Soil samples shall be obtained beneath the slab within native sails. Penetration through the obstruction will be required in order to <br />collect the samples. (Physical removal of the obstructicn will allow sampling according to the above conditions.) <br />TANK <br /># <br />TANK SIZE <br />(Gallons) <br />MINIMUM NUMBER I <br />of SOIL SAMPLES <br />LOCATION of SOIL SAMPLES <br />< 1,000 <br />3 per Tank <br />Canter and Ends OR Sides of Tank <br />1,000 - 10,000 <br />5 r Tank <br />I Center and Ends OR Sides of Tank <br />> 10,000 <br />5 OR More per Tank <br />Ends and Middle and generally spaced along <br />he length of the Tank <br />EH 23 046 (Revised 10/19/98) Page 7 <br />