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San Joaquin Health Services Re 6540 E Jahant Road, Acampo, CA <br /> Au2ust_lg, 1991 - Paje 2 of 2 Re-excavation/resample work plan <br /> • 7. Re-Excavation/Resample Due to the depth of ground water and the small <br /> size of the tank Jim Thorpe 011 , Inc./dba Rich-Mart Construction and <br /> Wm. Hunter & Associates, Registered Geologists , feel the best method <br /> of clean up will be a re-excavation/resample The excavation will start <br /> at a point 5 feet east of the existing excavation and extend west to a <br /> point approxmiately 20 feet distant and a point south approximately <br /> 5 feet from the existing excavation to a northerly point and approx- <br /> imately 20 feet distant The excavation shall be approximately 20 feet <br /> in depth. The close proximity of a large tree (see attached plot plan) <br /> precludes excavation to the northwest any long distance Hopefully, <br /> all contamination will be cleaned up within the parameters suggested <br /> The resulting excavation will be approximately 20 feet by 20 feet by 20 <br /> feet. Total amount of spoil removed will be approximately 300 cubic <br /> yards All spoil will be placed on 6 mil plastic and covered with same <br /> on site Soil disposition decisions can be made after amounts and con- <br /> tamination levels are ascertained. Samples will be taken at the middle <br /> of the length of each side wall approximately 2 feet up from the bottom <br /> and 5 feet above that (i e 7 feet from the bottom) and 4 bottom samples <br /> at approximately 2 feet in from the side and ends of the excavation, <br /> 4 samples will be taken from the spoils pile resulting in 16 soil samples <br /> total Soil samples will be analyzed for EDB, BTEX, and TPN-G Water <br /> sample will be taken from the well on site at the time of excavation and <br /> analyzed for same The entire project will be under the direction of <br /> Wm. J Hunter & Associates, Registered Geologists All reports , conclu- <br /> sions, and recommendations will be made by them Scale drawings showing <br /> existing excavation, proposed excavation , sample locations and plot plan <br /> are attached <br /> 8 Health and Safety plan attached. <br /> 9 Timing Sampling could be scheduled within two weeks following your <br /> review of this work plan The sample analyses should be ready for your <br /> review within three weeks after they have been taken <br />