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<Jennifer.Williamst@nvS com reg Dickinson (grdickinson(,Dpacificedee• Com) . <br /> <Frdickinson(Opacificedge eng com>; Logan Linderman <llinderman(@icsinc tv>; Lor Xiang <br /> (Ixiong(@sicehd com) <IxioneCa sicehd com>; Linda Turkatte [EH] (LTurkatte(@sicehd com) <br /> <LTurkattec@sicehd com> <br /> Subject: Manteca Firing Range Results and Additional Excavation Areas <br /> Hi, Michael. <br /> See appended for the laboratory results and a map showing the sample locations based on the GPS <br /> coordinates. <br /> Based on the lead, CAM 17 metals, tin, and PAH results, lead is the remaining COPC at the site-we have <br /> 7 soil sample results (out of 97) that have reported total lead greater than 80 mg/kg. <br /> The appended "Additional Excavation Areas" map shows the locations, reported concentrations, and <br /> proposed additional excavation limits. Based on the reported concentrations and excavation areas, I <br /> estimate one more load of RCRA material and four to five loads of non-RCRA material. <br /> Pending schedule confirmation from NV5 and ICS, I anticipate that the additional excavation will occur <br /> the week of April 10 and should be completed in one to two days—we will keep you posted once the <br /> schedule is confirmed. <br /> Welcome back from vacation and please let us know if you have questions. <br /> Thanks, <br /> Rick. <br /> Richard Day, CEG, CHG I Principal/Senior Geologist <br /> GEOCON CONSULTANTS, INC. <br /> 6671 Brisa Street, Livermore, California 94550 <br /> P1925.371.5900 ext. 401 M1925.872.5860 <br /> 45V)r <br /> daageoconinc com / www.eeoconinc.com / Facebook / Linkedin <br /> Bay Area - Sacramento - Fairfield- Los Angeles - Orange County - Riverside County - Palm <br /> Desert - San Diego <br /> Geotechnical Engineering Environmental Services Engineering Geoloey Construction <br /> Inspection <br /> Land Development Transportation Infrastructure Institutional Brovmfields/Redevelopment Natural Resources <br /> 4 <br />