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SAMPLING..OTOCOL FOR ROUTINE TANK REh'�'ALS <br /> The following represents minimum sampling criterion required for closure compliance. Sol[ 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 feel. If <br /> contamination h documented during closure, an Unauthorized Release Notification must be completed and submitted <br /> within Ove (5) working days pursuant to California I lealth & Safely Code, Section 25295. <br /> WATERI�OT PRESENT IN TIIE TANK 1-IT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> # (Oallons) of SOIL SAMPLES <br /> 5�f < 1,000 1 per Tank Fill OR Pump End of Tank <br /> 1,0(10 - 10,0(1) 2 per Tank 1 at each End of Tank <br /> > 10,000 l or Mote Ends and Middle OR generally <br /> per Tank spaced along the length of the Tank <br /> PIPING AND STOCKPILE <br /> PIPINO SOIL SAMPLES 1 Sample every 20 lineal feet <br /> TANK & PIPINO STOCKPILE SAMPLES 2 Samples every 50 cubic yards <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK SIZE MINIMUM NUMB It LOCATION of SOIL MINIMUM NUMBER of <br /> # (Gallons) of SOIL SAMPLES SAMPLES WATER SAMPLES <br /> < 10,0(1() From wall next to lank <br /> Single Tank 2 ends at soil/groundwater t <br /> Interface <br /> > 10,00(1 OR From wall next to tank <br /> Tank Cluster 4 ends at soil 1 <br /> groundwaler Interface <br /> SIM 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 MINIMUM NUMBER LOCATION of SOIL.SAMPLES <br /> # (Oallons) of SOIL SAMPLES <br /> < 1,000 J per Tank Center and Ends OR Sides of Tank <br /> I <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 /> Fit 23 047 (Revised 7/10/92) Page 1 <br />