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G - <br /> SAM, .i PROTOCOL FOR ROUTINE TANK REi. ALS <br /> N <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 /> WATER NOT PRESENT IN THE TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> p (Gallons) of SOIL SAMPLES <br /> < 11000 1 per Tank Fill OR Pump End of Tank <br /> t X09 1 , 000 - 10,000 2 Der Tank 1 at each End of Tank <br /> (I > 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 /> PIPING SOIL SAMPLES 1 Sample every 20 lineal feet <br /> TANK & PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION of SOIL MINIMUM NUMBER of <br /> k (Gallons) of SOIL SAMPLES SAMPLES WATER SAMPLES <br /> < 10,000 From wall next to tank <br /> Single Tank 2 ends at soil/ groundwater l <br /> interface <br /> > 10 ,000 OR From wall next to tank <br /> Tank Cluster 4 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 obstruction will allow sampling according to the above conditions.) <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION of SOIL SAMPLES <br /> N (Gallons) of SOIL SAMPLES <br /> < 19000 3 per Tank Center and Ends OR Sides of Tank <br /> 11000 - 10 ,000 5 per Tank Center and Ends OR Sides of Tank <br /> > 104000 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 />