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5.4\?L!Tt PROTOCOL FOR ROUTINE TANK REMO <br /> VALS <br /> The following represents minimum cmpling criterion required for closure compliance. Soil samples collecal shall be <br /> representative of native soils benceh the tank's invert (tank's bottom) at a collection depth not to exceed ? -4 feet. If <br /> contamination is documented during closure, an Unauthorized Release Notification must be completed and s.;nutted <br /> ` within five (5) working days puts=a to California Health & Safety Code, Section 25295. <br /> WATER NOT PRESENT IN THE TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES I <br /> # (Gallons) of SOIL SAMPLES <br /> < 1,000 I 1 per Tank Fill OR Pump End of Tank <br /> ` 1,000 - 10,000 I 2 per Tank 1 at each End of Tank <br /> > 10,000 I 3 or More Ends and Middle OR generally I <br /> per Tank spaced along the length of the Tack <br /> PIPING AND STOCKPILE <br /> PIPING SOIL S �NDLES 1 Sample every 20 lineal feet <br /> TANK & PIPWG STOCKPILE S?VfPLFS 2 Samples every 50 cubic yards <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK SIZE MINIMUM NLMBER LOCATION of SOIL MINIMUM \Z-DER of <br /> # (Gallons) of SOIL SAMPLES SAMPLES WATER SA:�gr LS <br /> X10.000 I From wall next to tank <br /> Single Tank E4Tends <br /> nds at soil/groundwater I <br /> nterface <br /> > 10,000 OR rom wall next to tank <br /> Tank Cluster at soil/ I <br /> roundwater interface <br /> r <br /> SLAB PRESENT IN THE TANK PIT <br /> 3oi1 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 SAMPLES <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 Center and Ends OR Sides of Tank <br /> > 10,000 5 OR More per Tank Ends and Middle and generally spaced along <br /> the length of the Tank <br /> M 23 047 (Revised 7/10/92) Page 7 <br />