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SAMPLIN`.OTOCOL FOR ROUTINE TANK RE '.ALS <br /> The following represents minimtnn sampling criterion required for closure compliance. Soil samples collected shall be <br /> represemnlive or native soils beneath the tank's invert(tank's bottom) al a collection dep(h not to exceed 2 - 4 feet. If <br /> contamination is documented during closure, an Unauthorized Release Notification must be completed and submitted <br /> within five (5) working days pursuant to California Health & Safety Code, Section 25295. <br /> WA'ITR NO.1' PROSIENT IN THE TANK PTT <br /> TANK TANK SIZE MINIMUM NUMBERLOCATION OF SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> < 1,(x)0 I per Tank Fill OR Pump End of Tank <br /> 1'm) - 10,00 2 pet 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 /> PIPING SOIL SAMPLES 1 Sample every 20 lineal feet <br /> MNK & PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> WATER IS PRESEW IN TANK PIT <br /> TANK 'TANK SIZE FMINIMUM NUMBER LOCATION of SOIL MINIMUM NUMBER of <br /> # (Gnflons) OIL SAMPLES SAMPLES WATER SAMPLES <br /> < 10,000 From wall next to tank <br /> Single Tank 2 ends al soil/groundwater I <br /> Interface <br /> > 10,(X)0 OR From wall next to tank <br /> Tank Cluster 4 ends at soil/ 1 <br /> groundwater Interface <br /> SLAB PRPSENT IN THE TANK PIT <br /> Soft 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 /> # (Oallons) of SOIL SAMPLES <br /> < l,W) 3 per Tank Center and Ends OR Sides or Tank <br /> 1'm) - 10,00 5 per 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 /> EI( 23 047 (Revised 7/10/92) Page 7 <br />