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SAMPLING PltIIII.,r'OCOL FOR ROUTINE TANK REMOtVI <br /> Ilowing represents minimum sampling criterion required for closure compliance. Soil samples collected shall be <br /> entative of native soils beneath the tank's Invert (tank's bottom) at a collection depth not to exceed 2 - 4 feet. If <br /> niamination is documented during closure, an Unauthorized Release Notification must be completed and submitted <br /> tithin rive (5) working days pursuant to California Health & Safety Code, Section 25295. <br /> WATER NOT 1'RFSL'N'r IN 'rIIE TANK I'I'I' <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES . <br /> # ( of 'LES <br /> < 1,000 1 per Tank Pill OR Pump End of Tank <br /> 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 /> ✓ I Sample every 20 lineal feet <br /> 2 Samples every 50 cubic yards <br /> F WATER 1S PRESENT IN TANK PIT <br /> TANKETAt�K SIZE MINIMUM NUMBER LOCATION of SOIL MINIMUM NUMBER of <br /> I # ons) of SOIL SAMPLES SAMPLES WATER SAMPLES <br /> < 10,000 From wall next to tank <br /> Single Tank 2 ends at soil/ groundwater 1 <br /> interface <br /> > 10,000 OR From wall nest to tank <br /> 'rank Cluster 4 ends at soil/ 1 <br /> groundwater interface <br /> SIAB PRESENT IN 'rIIETANK 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 SAMPLE <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 Cenier and Ends OR Sides of Tank <br /> t > 10,(](X1 5 Olt More per'I'an{; Ends and Middle and generally spaced along <br /> the length of the Tank <br /> Ell 23 047 (Revised 7/10/92) Page 7 <br />