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' `,•tea- <br /> SAMP '(�ROTOCOL FOR ROUTINE TANK R . .ALS <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 within <br /> five (5) working days. California Health & Safety Code, Section 25295. <br /> WATER NOT PRESENT IN THE TANK PTT <br /> TANK TANK.SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> T (Gallons) of SOIL SAMPLES <br /> 1,000 I per Tank Fill OR Pump End'-of Tank <br /> 1,000.- 10,000 2 per Tank 1 at each End of Tank <br /> > 10;000 3 or More Ends and Middle OR generally <br /> per Tank spaced along the length of the Tank <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK,SIZE MINIMUM NUMBER LOCATION of SOIL MINDYfUM NUMBER of <br /> # (Gallons) of SOIL SAMPLES SAMPLES WATER 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 THE TANK PTT <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 MINIMUM NUMBER LOCATION of SOU, SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> 'I <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 i <br /> the length of the Tank <br /> PEPING AND STOCKPILE i <br /> PIPING SOIL SAMPLES 1 Sample every 20 lineal feet <br /> TANK,& PIPING STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> i <br /> EH 23 447 {REV 4/23/91) <br /> Page 7 <br /> j <br />