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. WH <br /> F WHF Environmental Consultants, Inc. <br /> Post Office Box 6729 <br /> Modesto, CA 95355-6729 <br /> (209) 579-8138 <br /> October 6, 1992 <br /> OCT 0 7 1992 <br /> ENVIRONMENTAL HEALTH <br /> San Joaquin County Environmental Health Department PERMIT/SERVICES <br /> Steven K. Schneider <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> RE: AA Tool Rental, 2911 E. Fremont St. Stockton, CA <br /> Dear Steven: <br /> We are submitting this letter and a site diagram as a proposed addendum to our <br /> previously submitted work plan. <br /> This letter should be called Phase I A of the workplan, and the original should <br /> be Phase I B. <br /> This addendum - Phase I A, is requesting to, over excavate the previous <br /> excavation to the north of the previously indicated contaminated area of the tank <br /> excavation. In addition, we are proposing to excavate the area of the "line leak" using <br /> an excavator. We have included a top and side view of the proposed areas to be <br /> excavated. We will be using a Photo Ionization detector to pre screen areas that we <br /> believe are clean. <br /> An adequate number of lab samples will be taken to verify that the site is clean. <br /> We estimate that the former tank areas will be over excavated by 50 to 60 cubic <br /> yards, and the line areas will be over excavated to approximately 8-12 cubic yards. <br /> Contaminated soils will be stockpiled on site with previously excavated soils. <br /> Overburden (clean soil) will be stockpiled in a separate pile and samples will be taken <br /> to verify they are not contaminated. The hole will be filled with clean soils. <br /> We anticipate taking samples of the spoils pile for disposal at the forward <br /> landfill. We will send you copies of those reports, as well as the acceptance receipts, <br /> and transportation documents so that a closure letter can be issued. <br />