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SAMPLING PROTOCOL FOR ROUTINE TANK REMOVALS <br /> The following represents minimum sampling criterion required for closure compliance. Soil samples collected shall be <br /> representative of native solls 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 /> WATER NOT PRESENT 1N THE TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION OF SOIL SAMPLES <br /> # (Gallons) of SOIL SAMPLES <br /> t 1,000 1 per T- ank.,.._,A Fill OR ,Pump End of Tact <br /> y' - 1. at each End of Tank % <br /> � 1,000 - 10,000---- 2 per Tank / y <br /> > 10,000 3 or More Ends and Middle OR generally <br /> per Tank spaced along the length of the Tank <br /> PIPING AND 91'OCKPII E <br /> -PIPING <br /> 07S-Off S�P:� <br /> -- - - 1. Sample every 20 lineal feet <br /> TANK& PIPINLE SAMPL 2Samples every 50 cubic yards <br /> WATER IS PRESENT IN TANK PIT <br /> TANK TANK SIZE MINIMUM NUMBER LOCATION of SOIL MINIMUM NUMBER of <br /> # (Gallons) of SOIL SAMPLES SAMPLES WATER SAMPLES <br /> c 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 tarok <br /> Tank Cluster 4 ends at soil! 1 <br /> groundwater interface <br /> SLAB PRESENT IN 7'IIE 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 NUMQEft LOCATION of SOIL SAMPLES <br /> # (Callon) of SOIL SAMPLES <br /> 1 fl00 3 per Tank Center and Ends OR Sides of Tank <br /> EEI1,000 - 10,000 5 per Tank Center and Ends OR Sides of Tank <br /> > 10,0(x! 5 OR More per'I'at�l, raids and Middle and generally spaced along <br /> the length of the Tank <br /> Page 7 <br /> Eli 23 047 (Revised 7/10/92) <br />