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SAMFOG PROTOCOL FOR ROUTINE TANK AVALS <br /> The following represents minimum sampling criterion required for closure compliance. Soil samples collected shall <br /> be representative of native soils beneath the tank's invert (tank's bottom) at a collection depth not to exceed 2-4 <br /> feet. If contamination is documented during closure,an Unauthorized Release Notification must be completed and <br /> submitted within five (5) working days pursuant 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 <br /> # (Gallons) of SOIL SAMPLES <br /> 1,000 1 per Tank Fill OR Pump End of Tank <br /> 865- 1,000- 10,000 2 per Tank 1 at each End of Tank <br /> D1Ul <br /> > 10,000 3 or More per Tank Ends and Middle OR generally <br /> sj2aced along the lenaLh of the Tank <br /> PIPING AND STOCKPILE <br /> 1 PIPING SOIL SAMPLES 1 1 Sample every 20 lineal feet <br /> 2 TANK & PIPING STOCKPILE SAMPLES 1 2 Sam les every 50 cubic yards <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK SIZE MINIMUM LOCATION of SOIL MINIMUM NUMBER <br /> # (Gallons) NUMBER of SAMPLES of WATER SAMPLES <br /> SOIL SAMPLES <br /> < 10,000 From wall next to tank <br /> Single Tank 2 ends at soil/ 1 <br /> groundwater 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 PIT <br /> Soil samples shall be obtained beneath the slab within native soils. Penetration through the obstruction will <br /> be required in order to collect the samples. (Physical removal of the obstruction will allow sampling according <br /> 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 Eer Tank Center and Ends OR Sides of Tank <br /> > 10,000 5 OR More per Tank Ends and Middle and generally spaced <br /> alona the lenE22 of the Tank <br /> EH 23 047(Rev 7/10/92) <br /> CLOSURE PLAN: 865-DlU1 <br />