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Oct 25 01 11 : 21a TAIT Environmental S6stem (916) 658-1011 p. 10 <br /> SAMPLING PROTOCOL FOR ROUTINE TANK REMOVALS <br /> The following represents minimum sampling criterion requited for closure compliance. Soil samples collected shall be <br /> representative of native soils beneath the tank's invert(taak's bottom)at a collection depth not to exceed 2-4 feet. If contamination <br /> is documented during closure,an Unauthorized Release Notification must be completed and submitted within five(5)working days <br /> 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 /> (Gallons) of SOIL SAMPLES <br /> < 1.000 1 r Tank Fill OR PumpEndofTank <br /> 1,000- 10 000 2 per Tank 1 at each End of Talc <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 I Sample evSg 20 lineal feet <br /> TANK do 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 <br /> # (Gallons) of SOIL SAMPLES SAMPLES of WATER SAMPLES <br /> < 10,000 2 from wall tract to tank <br /> Single Tank 3 cnds at soillgroundwater I <br /> interface&t below tank <br /> > 10,000 OR 4 from will tract to tank <br /> Tends at soil) waaw <br /> Tank Cluster <br /> S or more interface& I below each I <br /> hank <br /> SLAB PRESENT IN THE TANK PIT <br /> Soil samples shall be obtained beneath the slab within native soils. Penetration througb the obstrucdon 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 /> I (Gallons) of SOIL SAMPLES <br /> < 1,000 3 Per Tank Center and Ends OR Sides of Tank <br /> 1,000- 10,000 S Per Tanis 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 /> EH 23 046(Revised 08/13/99) Page 7 <br /> 10/25/01 THU 10:14 [T%/R% NO 87481 16 010 <br />