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SAMPLING PROTOCOL O, ROUTINE <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 />TANK I TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /># (Gallons) of SOIL SAMPLES <br />< 1,000 1 12Sr Tank Fill OR Pump End of Tank <br />1,000 -10,000 2 2er Tank 1 at each End of Tank <br />> 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 />. re . — Tce seas T.," iT mT T A M%r DTT <br />PIPING SOIL SAMPLES <br />1 Sam le eve 20 lineal feet <br />.. <br />LOCATION of SOIL <br />TANK & PIPING STOCKPILE SAMPLES <br />2 Samples every 50 cubic yards <br />. re . — Tce seas T.," iT mT T A M%r DTT <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 I TANK SIZE <br /># (Gallons) <br />MINIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION of SOIL SAMPLES <br />< 1,000 3 per Tank Center and Ends OR Sides of Tank <br />11000 - 10,000 5 2Sr 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 />TANK SIZE <br />r ♦ ca i a'iaa cis a aw.+..+ a <br />MINIMUM NUMBER <br />.. <br />LOCATION of SOIL <br />- <br />MINIMUM NUMBER of <br />TANK <br /># <br />(Gallons) <br />of SOIL SAMPLES <br />SAMPLES <br />WATER SAMPLES <br />< 10,000 <br />From wall next to tank <br />Single Tank <br />2 <br />ends at soil/ groundwater <br />1 <br />interface <br />> 10,000 OR <br />From wall next to tank <br />Tank Cluster <br />4 <br />ends at soil/ <br />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 I TANK SIZE <br /># (Gallons) <br />MINIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION of SOIL SAMPLES <br />< 1,000 3 per Tank Center and Ends OR Sides of Tank <br />11000 - 10,000 5 2Sr 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 />