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05/30/2003 16:36 <br />209468346 <br />FIFTH FLOOR <br />• <br />SAMPLING PROTOCOL FOR ROUTINE TANK REMOVALS <br />PAGE e7 <br />The following represents minimum sampling criterion required for closure compliance. Soil samples collected shall be representative <br />of native soils beneath the tank's invert (tank's bottom) at a collection depth not to exceed 2 - 4 feet. If contamination is documented <br />during closure, an Unauthorized Release Notification must be completed and submitted witbia five (5) working days pursuant to <br />CaInmia Health & Safety Code, Section 25295. <br />WATER NOT PRESENT IN THE TANK PIT <br />TANK <br />TANK SIZE <br />MINIMUM NUMBER <br />LOCATION OF SOIL SAMPLES <br /># <br />(Gallons) <br />of SOIL SAMPLES <br />MINIMUM NUMBER <br />LOCATION of SOIL <br />< 1,000 <br />1 per Tank <br />Fill OR Pump End of Tank <br />of SOIL SAMPLES <br />SAMPLES <br />of WATER SAMPLES <br />< 10,000 <br />1,000 - 10,000 <br />2 per Tank <br />1 at each End of Tank <br />Single Tank <br />3 <br />ends at soil/groundwatcr <br />> 10,000 <br />3 or More <br />Ends and Middle OR generally <br />interface & 1 below tank <br />per Tank <br />spaced along the length of the Tank <br />PTPiN(S AND STOCKPILE <br />WATER IS PRESENT IN TANK PIT <br />PIPING SOIL SAMPLES <br />1 Sam le every 20 lineal feet <br />LOCATION of SOIL SAMPLES# <br />TANK <br />TANK & PIPING STOCKPILE SAMPLES <br />2 Samples every 50 cubic yards <br />WATER IS PRESENT IN TANK PIT <br />SLAB PRESENT IN THE TANK 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 />MIINTIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION of SOIL SAMPLES# <br />TANK <br />TANK <br />TANK SIZE <br />MINIMUM NUMBER <br />LOCATION of SOIL <br />M]ND4UM NUMBER <br /># <br />(Gallons) <br />of SOIL SAMPLES <br />SAMPLES <br />of WATER SAMPLES <br />< 10,000 <br />2 from wall next to tank <br />Single Tank <br />3 <br />ends at soil/groundwatcr <br />1 <br />interface & 1 below tank <br />4 from wall next to tank <br />/ <br />> 10,000 OR <br />cods at soil/groundwater <br />Tank Cluster <br />5 or more <br />interface & 1 below each <br />1 <br />�X> <br />tank <br />SLAB PRESENT IN THE TANK 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 />EH 23 046 (Revised 3115102) Page 7 <br />MIINTIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION of SOIL SAMPLES# <br />TANK <br />FTANKSIZE <br />00 <br />> 10,000 <br />3 erTank <br />5 perTank <br />5 OR More per Tank <br />Centerand.£nds OR Sides of Tank <br />Center and Ends OR Sides of Tank <br />Ends and Middle and generally spaced <br />along the length of the Tank <br />EH 23 046 (Revised 3115102) Page 7 <br />