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SAMPLINO PROTOCOL FOR ROUTINE TANK REMOVALS <br /> The following represents minimum sampling criterion required for closure compliance. Soil sample collected shall be <br /> representative of native soils beneath the tank's Invert (tank's bottom)at a collection depth not to exceed 1 • 4 feet. If <br /> contamination is documented during closure, an Unauthorized Release Notification must be completed and submitted within five <br /> (3) working days pursuant to California Health do Safety Code, Section 23293. <br /> WATER (N LT PRESENT IN THE TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> N (Osllnns) of SOIL SAMPLES <br /> < 1,000 1 per Tank Fill OR Pump End of Tank <br /> �( 1,000 - 10,000 2 per Tank 1 at each End of Tank <br /> > 10,000 3 or Marc Ends and Middle OR generally <br /> per Tank spaced along the length of the Tank <br /> PIPING AND STOCKPILE <br /> XL <br /> PING SOIL 9AMPL 'S I Semple every 20 lineal feet <br /> NK A PIPING STOCKPILE SAMPLES 2 Samples every SO cubic yards <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER I LOCATION of SOIL MINIMUM NUMBER of <br /> # (Gallons) of SOIL SAMPLES SAMPLES WATER SAMPLES <br /> TTank00 From wall next to tank <br /> ank 2 ends at soil/groundwater l <br /> Interface <br /> 0 OR From wall next to tank <br /> uster 4 ends at soil/ I <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 <br /> 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 /> A (Gallons) of SOIL SAMPLES <br /> < 1,000 3 per Tank Center and Ends OR Sides of Tank <br /> 1,000 - 10,000 S per Tank Center and Ends OR Sides of Tank <br /> > 10.000 S OR More per Tank Ends and Middle and generally spaced along <br /> the length of the Tank <br /> Ell 23 046 (Revised 9/11/96) Page 2 <br />