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SAMPLING PROTOCOL FOR ROUTINE TANK REMOVALS <br />The following represents minimum sampling criterion requited 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 aot 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 5295. <br />WATER NOT PRESENT IN THE TANK PTT <br />TANK <br />TANK SIZE <br />(Gallons) <br />MINIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION OF SOIL SAMPLES <br />TANK & PIPING STOCKPILE SAMPLES <br />< 1.000 <br />1 per Tank <br />F11 OR Puma End of Tank <br />'r <br />1,00o - 10,000 <br />Z per Tank <br />1 at each End of Tank <br />2 <br />> 10,000 <br />3 or More <br />per Tanis <br />Ends and Middle OR generally <br />spaced along the length of the Tank <br />PIPING AND Sl'OCKPQ.E <br />e1 <br />PIPING SOIL SAMPLES <br />I Sample ev 20 lineal feet <br />E�4- <br /># a <br />TANK & PIPING STOCKPILE SAMPLES <br />2 Samples every 50 cubic yards <br />WATRR IS PRFSENT D4 T Nu K PIT <br />TANK <br />! ,f <br />TANK SIZE <br />(Gallons) <br />MINIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION of SOIL <br />SAMPL S <br />MINIMUM NUMBER of <br />WATER SAMPLES <br />< 1.000 <br />< 10,000 <br />Center and Ends OR Sides of Tank <br />From wall aea to tank <br />1.000 - 10.000 <br />5 oer Tank <br />Single Tank <br />2 <br />I ends at soil/ groundwater <br />I I <br />Eads and Middle and generally spaced along <br />die length of the Tank <br />interface <br />> 10,000 OR <br />From wall nea to tank <br />Tank Cluster <br />3 <br />I ends at soil <br />i 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 <br />TANK SIZE <br />(Gallons) <br />MINIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION of SOIL SAMPLES <br />III <br />< 1.000 <br />3 Der Tank <br />Center and Ends OR Sides of Tank <br />1.000 - 10.000 <br />5 oer Tank <br />Center and Ends OR Sides of Tank <br />! <br />> 10.000 <br />5 OR More per Tank <br />Eads and Middle and generally spaced along <br />die length of the Tank <br />EH 23 046 (Revised 10119198) Page 7 <br />