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SAMPLAROTOCOL, FOR ROU'T'INE TANK RO)VALS <br />The following represents minimum sampling criterion tequircd 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 <br />within five (5) working days pursuant to California Health & Safety Code, Section 25295. <br />NVA'I'ER NOT FRF—SENT IN TIIF, TANK 1'1'1' <br />TANK TANK SIZE <br />MINIMUM NUMBER <br />LOCATION OF SOIL SAMPLES <br /># (Gallons) <br />of SOIL SAMPLES <br />2 Samples every 50 cubic yards <br />1,000 <br />1 per Tank <br />Fill OR Pump End of Tank <br />1,000 - 10,000 <br />2 per Tank <br />1 at each End of Tank <br />' > 10,000 <br />3 or More <br />Ends and Middle OR generally <br />Ends and Middle and generally spaced along <br />the length of the Tank <br />per Tank <br />spaced along the length of the 'Tank <br />intetface <br />I <br />I'll'INC AND S1'OCTU'11,1; <br />IVA'IT,R IS Pit FSF.N'I' IN 'TANK PLT' <br />TANK <br /># <br />PIPING SOIL SAMPLES <br />1 Simple every 20 lineal feet <br />LOCKVION of SOIL <br />SAMPLES <br />TANK & PIPING STOCKPILE SAMPI_F-S <br />2 Samples every 50 cubic yards <br />IVA'IT,R IS Pit FSF.N'I' IN 'TANK PLT' <br />TANK <br /># <br />TANK SIZE <br />(Gallons) <br />MINIMUM NUMBER <br />of SOIL SAMPLES <br />LOCKVION of SOIL <br />SAMPLES <br />MINIMUM NUMBER of <br />WA'T'ER SAMPLES <br />< 1,000 <br />< 10,000 <br />Center and Ends OR Sides of Tank <br />From wall next to tank <br />1,000 - 10,000 <br />5 per Tank <br />Single Tank <br />2 <br />ends at soft/ groundwater <br />1 <br />Ends and Middle and generally spaced along <br />the length of the Tank <br />intetface <br />> 10,000 OR <br />From wall next to tank <br />Tank Cluster <br />4 <br />ends at soil/ <br />1 <br />groundwater interface <br />SLAB PRFSI N"1' IN '!Ills 'PANIC I'11' <br />Soil samples shall be obtained beneath the slab within native soils. Penetration through the obstruction will be regnired in <br />order to collect the samples. (Physical removal of the obstruction will allow sampling according to the above conditions.) <br />TANK <br /># <br />TANK SIZE <br />(Gallons) <br />MINIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION of SOIL SAMPLES <br />1 <br />< 1,000 <br />3 per Tank <br />Center and Ends OR Sides of Tank <br />1,000 - 10,000 <br />5 per Tank <br />Center and Ends OR Sides of Tank <br />> 10,000 <br />5 OR More per Tank <br />Ends and Middle and generally spaced along <br />the length of the Tank <br />EH 23 047 (Revised 7/10/92) Page 7 <br />