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SAMPLING TOCOL 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 />cation <br />contamination is documented during closure, <br />a Unauthorized <br />ia &Safety Code, Section must be completed and submitted <br />within five (5) working days pursuant <br />o <br />Cali <br />.. • • tlam <br />NU <br />TANK TANK SIZE MINIMUM MBER LOCATION OF SOIL SAMPLES <br />;# (Gallons) of SOIL SAMPLES <br />7 <br />1,000 1 per Tank Fill OR Pump End of Tank <br />1,000 - 10,000 2 per Tank <br />< P1 at each End of Tank <br />Ends and Middle OR generally <br />> 10,000 3 or More <br />per Tank spaced along the length of the Tank <br />PIPING AND STOCKPILE <br />PIPING SOIL SAMPLES 1 Sample every 20 lineal feet <br />TANK & PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br />TANK I TANK SIZE <br /># (Gallons) <br />< 10,000 <br />Single Tank <br />> 10,000 OR <br />Tank Cluster <br />MDTI MUM NUMBER <br />of SOIL SAMPLES <br />2 <br />4 <br />r <br />LOCATION of SOIL <br />SAMPLES <br />From wall next to tank <br />ends at soil/ groundwater <br />interface <br />From wall next to tank <br />ends at soil/ <br />groundwater interface <br />MINIMUM NUMBER of <br />WATER SAMPLES <br />1 <br />1 <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 <br />order to 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)AMPLES <br />< 1,000 3 per Tank HCenter and Ends OR Sides of Tank <br />1,000 - 10,000 5 per Tank Center and Ends OR Sides of Tank <br />> 10,000 5 OR More per Tank f Ends and Middle and generally spaced along <br />the length of the Tank <br />EH 23 047 (Revised 7/10/92) Page 7 <br />