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' Libbey Owens Ford Co. Geoprobe Investigation Work Ilan November 5, 1996 Page_z_ ' 2.1 Site Preparation Underground utilities located within the proposed work area will be identified by LOF prior to ' the fieldwork. Drilling permits will be obtained from the PHSIEHD for the Geoprobe sampling. Ron ' Rowe of the PHS/EHD will be notified of the fieldwork schedule at least 48 hours in advance. ' 2.2 Geoprobe Sampling Procedures The fieldwork will include the drilling of approximately ten (10) Geoprobe sampling boreholes at the proposed locations shown on Figure 3, Appendix A. The Geoprobe borings will be drilled by Vironex Environmental Services of Foster City, California. A description of the Geoprobe sampling system is contained in Appendix B of this document. A Condor geologist will be on site to direct all ' sampling activities and fieldwork. Prior to commencement of fieldwork, a tailgate safety meeting will be held and a site-specific Health and Safety Plan will be discussed with, and presented to, all crew ' members for their signatures. A copy of the Health and Safety Plan is contained in Appendix C of this document. The Geoprobe boreholes will be hydraulically advanced using a 2-inch diameter conical bit. ' The rods and bit will be thoroughly cleaned before each borehole is drilled using laboratory grade, non-phosphate detergent and hydrocarbon free water and double rinsing with hydrocarbon free water. ' The boreholes will be drilled to approximately three (3) feet below the shallow unconfined groundwater table. Groundwater is anticipated to be encountered at 12 to 13 feet below the ground surface (bgs). ' Upon completion of the drilling and sampling, the boreholes will be grouted with a cement slurry containing approximately 4 percent bentonite. The slurry will be tremied into the borehole to avoid bridging. The decon rinsate will be placed in a 55-gallon drum, sealed, labeled, and left on site pending laboratory analyses. Disposal of hazardous materials, if any, will be the responsibility of the tproperty owner. ' 2.2.1 Soil Sampling The boreholes will be sampled continuously from approximately 2 feet bgs to approximately ' 16 feet bgs using a 1.5-inch I.D., macro core soil sampler fitted with a 4 foot long, clear, ' �� CONDOR