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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 />�• r o.. � r :r -- - <br />TANK <br /># <br />TANK SIZE Ml[NDAUM NUMBER <br />(Gallons) of SOIL SAMPLES <br />LOCATION OF SOIL SAMPLES <br />LOCATION of SOILr <br />SAMPLES <br />< 1,000 1 per Tank <br />Fill OR Pump End of Tank <br />Z <br />1,000 - 101000 2 per Tank <br />1 at each End of Tank <br />> 10,000 <br />> 10,000 3 or More <br />per Tank <br />Ends and Middle OR generally <br />spaced along the length of the Tank <br />.t•r. _rr y •y:rr <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 <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 />PIPING SOIL SAMPLES 1 Sample every 20 lineal feet <br />TANK & PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br />y� <br />✓� <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 <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 />TANK SIZE <br />(Gallons) <br />1 r NUMBER <br />of SOIL SAWLES <br />LOCATION of SOILr <br />SAMPLES <br />r r: of <br />WATER SAU[PLES <br />Center and Ends OR Sides of Tank <br />10,000 <br />• n wall 1 :a •. i <br />> 10,000 <br />5 OR More per Tank <br />Single Tank <br />ends at soill groundwater <br />interface <br />> 10,000 OR <br />Fromwall next to tank <br />1 Cluster <br />ends / <br />groundwater interf= <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 <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 SOB. 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 />BH 23 047 (Revised 7/10/92) Page 7 <br />