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04/29/2003 15:18 2094671118 AGE STOCKTON PAGE 04 <br /> SAMPLING PROTOCOL FOR ROUTINE TANK REMOVALS <br /> The fallowing 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 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 YIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> # (Gallons) of SOIL,SAMPLES <br /> A <br /> < 1,000 1 per Tank FiII OR Puma End of Tank <br /> �"1 05 1,000- 10.000 2 r Tatty 1 at each End of Tank <br /> 10,000 3 or More Ends and Middle OR generally <br /> per TaU spaced along the length of the Tank <br /> PIPING AND STOCKPILE , <br /> r x PIPING SOIL SAMPLES 1 Sam ie every 20 lineal feet <br /> X TANK&PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> DCW <br /> bip- <br /> WATER IS PRESENT IN TANK PIT <br /> TANK WANK SIZE MINIMUM NUMBER LOCATION of SOIL MINIMUM NUMBER <br /> # (Gallons) of SOIL SAMPLES SAMPLES of WATER SAMPLES <br /> < lo,o00 2 from wall next to tank <br /> Single Tattle 3 ends at solllgrourtdwater I <br /> interface& 1 below tank <br /> 4 from wall Next to tante <br /> > 10.000 OR Grids at soil/groundwater <br /> Tante Cluster 5 or more interface& I below each I <br /> tank <br /> SLAB PMENT IN THE TANK PTT <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 aecordio.o to the above conditions.) <br /> i <br /> i <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION of SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> < 1,600 3 r Tank Center and Ends OR Sides of Tank <br /> 11000- 10.000 S per Tank Ceater 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 08113199) Page 7 <br />