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SAMPLF— PROTOCOL FOR ROUTINE TANK RET-AIS <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 TAN-K PIT <br /> TANK TANK SIZE MINIMtibi NUMBER LOCATION OF SOIL SAMPLES <br /> (Gallons) of SOIL SAMPLES <br /> EE <br /> 00 1 cer Tank Fill OR P,.imu End of Tank <br /> - In nm 2 Der Tank 1 at each End of Tank <br /> 000 I 3 or More Ends and Middle OR generally <br /> per Tank spaced along the length of the Tank <br /> PIPING AN"D STOCKPILE <br /> IIPIPING SOIL SAMPLES I 1 Sample every 20 lineal feet <br /> i <br /> TANK & PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> WATER IS PRESENT IN T:NK PIT <br /> I <br /> TANK TANKSIZE MINDvIUM NUMBER LOCATION of SOIL MINIMUM NUMBER of <br /> (Gallons) I of SOIL SAMPLES SAMPLES WATER SAMPLES <br /> < 10,000 • From wall next to tank <br /> Single Tank I 2 I ends at soil/ groundwater l <br /> interface <br /> > 10,000 OR From wall next to tank <br /> Tank Cluster 4 I ends at soil/ l <br /> groundwater interface <br /> SLAB PRESENT IN THE TANX 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 I LOCATION of SOIL SAMPLES <br /> (Gallons) of SOIL SAMPLES <br /> < 1.000 3 ger Tank ( Center and Ends OR Sides of Tank <br /> 5 r Tank I Center and Ends OR Sides of Tank <br /> 1.000 - 10,000 <br /> > 10.000 I 5 OR More per Tank I Ends and Middle and generally spaced along <br /> the length of the Tank <br /> i <br /> EH 23 046 (Revised 10/19/98) Page 7 <br />