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SANa J 0 A Q U I N Environmental Health Department <br /> COUNTY <br /> SAMPLING PROTOCOL 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 /> contamination is documented during closure,an Unauthorized Release Notification must be completed and submitted within <br /> five(5)working days pursuant to California Health&Safety Code,Section 25295. Samples cannot be combined into a <br /> composite sample for analysis in the field or the lab. Each sample must have a set of corresponding analytical <br /> results. <br /> WATER NOT PRESENT IN THE TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> G� <1,000 1 perTank Fill OR Pumn End of Tank <br /> 1,000-10,000 2 perTank 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 /> TANK&PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> WATER IS PRESENT IN TANK PIT <br /> TANKTANK SIZE MINIMUM NUMBER of LOCATION of SOIL MINIMUM NUMBER of <br /> # (Gallons) SOIL SAMPLES SAMPLES WATER SAMPLES <br /> 2 from wall next to tank <br /> <10,000 3 ends at soil/groundwater 1 <br /> Single Tank interface&1 below tank <br /> 4 from wall next to tank <br /> / >10,000 OR 5 or more ends at soil/groundwater 1 <br /> V Tank Cluster interface&1 below each <br /> tank <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) of SOIL SAMPLES <br /> <1,000 3 per Tank Center 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 Ends and Middle and generally spaced <br /> along the length of the Tank <br /> Tri-Regional Recommendations—Appendix A <br /> 6of10 <br />