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SAMPLING PROTOCOL FOR ROUTINE TANK REMOIALS <br />The following represents minimum sampling criterio t 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 r Tank Fill OR Pum End of Tank <br />1,000 - 10,000 2 Leer Tank I at each End of Tank <br />> 10,000 3 of More Ends and Middle OR generally <br />per 7ank spaced along the length of the Tank <br />�i/ <br />41 <br />TANK <br />N <br />ill <br />TANK & PIPING STOCKPILE SAMPLES <br />WATER IS PRESE <br />TANK SIZE MINIMUM NUMBER <br />(Gallons) of SOIL SAMPLES <br />< 10,000 <br />Single Tank 2 <br />> 10,000 OR <br />Tank Cluster <br />4 <br />lineal feet <br />2 Samples every 50 cutic yards <br />IN TANK PIT <br />LOCATION of SOILMINIMUM NUMBER of <br />SAMPLES WATER SAMPLES <br />From wall next to tank <br />ends at soil/ groundwater <br />From wall next to tank <br />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 obstriction will allow sampling according to the above conditions.) <br />TANK <br />q <br />TANK SIZE <br />(Gallons) <br />MINIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION of SOIL SAMPLES <br />< 1,000 <br />3 per Tank <br />Center and Ends OR Sides of Tank <br />1,000 - 10,000 <br />5 ver Tank <br />Center and Ends OR Sides of Tank <br />L> <br />10,000 <br />`- OR More per Tank <br />Ends and Middle and generally spaced along <br />I the length of lie Tank <br />EH 23 046 (Revised 10/19/98) Page 7 <br />