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SUBSURFACE SOIL AND GROUNDWATER INVESTIGATION <br /> WORK PLAN <br /> APN 179-160-210 <br /> 4900 E.MARIPOSA ROAD <br /> STOCKTON, SAN JOAQUIN COUNTY,CALIFORNIA <br /> December 12, 2023 <br /> 1.0 INTRODUCTION <br /> This work plan was prepared by Condor Earth (Condor) to describe proposed Subsurface Soil and <br /> Groundwater Investigation activities at 4900 E. Mariposa Road, Stockton, California (Figures 1 and 2, <br /> Appendix A). The Site is identified as Assessor's Parcel Number(APN) 179-160-210 and is owned by the <br /> Donald and Nita Rienhart Trust(Owner). The purpose of the work is to evaluate whether historical use of <br /> the Site has resulted in contamination beneath the Site prior to purchase of the property. This Subsurface <br /> Soil and Groundwater Investigation will be conducted for Dirt Dynasty, Inc. (Client), the prospective <br /> purchaser of the Site. <br /> 2.0 PROJECT BACKGROUND <br /> The Site comprises approximately 6.5 acres designated as APN 179-160-210 located at 4900 E. Mariposa <br /> Road, in Stockton, San Joaquin County, California. Condor discovered that, based on review of historical <br /> documents, the Site was agricultural land until the mid-1970s when the current building was constructed <br /> for use by different trucking and bus companies and vehicle maintenance. The Site has multiple septic <br /> systems installed at various times in the past. Condor identified the septic system leach fields as areas of <br /> environmental concern due to possible releases of waste automotive fluids to the subsurface (primarily <br /> petroleum wastes). <br /> 3.0 SUBSURFACE INVESTIGATION PLAN <br /> Condor will conduct the work based upon the Owner-identified locations of the septic leach fields at the <br /> Site. Boring locations will be marked out prior to drilling operations. Condor will advance up to four (4) <br /> direct push borings (Figure 3, Appendix A) to approximately 20 feet below ground surface (bgs) at each <br /> location to inspect soil and collect soil samples at selected intervals.In addition,one(1)groundwater sample <br /> will be collected during drilling from a fifth boring location. Groundwater is anticipated to be encountered <br /> at approximately 50 feet bgs. <br /> Condor will utilize a State-licensed (C-57 drilling license) drilling contractor to conduct the drilling. We <br /> anticipate using a drilling rig equipped with direct push capability, which will minimize soil cuttings <br /> generated during the investigation. Any soil cuttings generated during the investigation will be placed in a <br /> 55-gallon drum or lidded plastic bucket, sealed, labeled, and left on-site pending laboratory analyses for <br /> disposal characterization.Borings will be backfilled with type I or 11 neat cement grout upon completion in <br /> accordance with SJEHD Guidelines and restore the surface to match surrounding conditions. <br /> 4.0 FIELD PROCEDURES <br /> 4.1 SITE PREPARATION <br /> Condor will obtain the necessary drilling permits from the San Joaquin County Environmental Health <br /> Department (SJCEHD) prior to scheduling field activities with the sub-contractors and notifying <br /> CONDOR <br />