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v <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 <br />within five (5) working days pursuant to California Health & Safety Code, Section 25295. <br />V IF <br />TANK TANK SIZE <br /># (G ons) <br />MINIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION OF SOIL SAMPLES <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 />per Tank <br />Ends and Middle OR generally <br />spaced along the length of the Tank <br />PIPING AND STOCKPII.E <br />TANK If TANK SIZE <br /># (Gallons) <br />TWATTWt WQ DW)T.°QWAAP'T WILY TAATWF nWT <br />LOCATIONofSOIL <br />1� 4 ♦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 next to tank <br />Tank Cluster 4 ends at soil 1 <br />groundwater interface <br />SLAB PRESENT IN WE TANK 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 <br /># (Gallons) <br />` • t 1`I Sample every 20 lineal feet <br />LOCATION of SOIL SAMPLES <br />TANK & PIPING STOCKPILE SAMPLES <br />TANK If TANK SIZE <br /># (Gallons) <br />TWATTWt WQ DW)T.°QWAAP'T WILY TAATWF nWT <br />LOCATIONofSOIL <br />1� 4 ♦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 next to tank <br />Tank Cluster 4 ends at soil 1 <br />groundwater interface <br />SLAB PRESENT IN WE TANK 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 <br /># (Gallons) <br />MINIMUM NUMBER <br />of SOIL SAMPLES <br />LOCATION of SOIL SAMPLES <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 />