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SA.AWUNG 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 act 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 TANK PTT <br />TANK TANK SIZE MINLMUM NUMBER <br />(Gallons) of SOIL SAMPLES <br />< 1.000 <br />t.uw - 10.000 I 2 Pe- Tani <br />> 10,000 I 3 or More <br />i per Tank <br />TANK & PIPING STOCKPILE SAMPLES <br />WATER IS PRESE <br />TANKTANK SIZE MINLAUM :NUMBER <br />(Gallons) I of SOIL SA.NIPLLS <br />< 10,000 <br />Single Tank 2 <br />> 10,000 OR <br />Tank Cluster 1 4 <br />LOCATION OF SOIL SAMPLES <br />OR Pimp End of <br />at each End of <br />Ends and Middle OR generally <br />spaced along the length of the Tank <br />1 Sample every 20 lineal feet <br />2 Samples every 50 cubic Yards <br />T.: <br />LOCATION of SOIL <br />SAMPLES <br />From wall next to tank <br />ends at soil/ groundwater <br />From wall next to tank <br />ends at soil/ <br />groundwater interface <br />MINIMUM NUMBER of <br />WATER SA,NIPLES <br />SLAB PRESENT IN THE TAM{ PIT <br />Soil samples shall be obtained beneath the slab within native sous. Penetration through the obstruction will be required in order to <br />collect the samples. (Physical removal of the obst uc:ion will allow sampling according to the above conditions.) <br />TANK <br /># <br />TANK SIZE <br />MINIMUM NUMBER I LCCATION of SOIL SAMPLES <br />I <br />(Gallons) <br />of SOIL SAMPLES <br />< 1.000 <br />I 3 De: Tank <br />Canter and Ends OR Sides of Tank <br />1.000 - 10,000 I <br />5 Der Tank <br />I Center and Ends OR Sides of Tank <br />> 10.000 5 OR More per Tank <br />Ends and ;Middle and generally spaced along <br />the lengh of the Tank <br />EH 23 046 (Revised 10/19198) page 7 <br />