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Michael Kith [EH] <br /> From: Rick Day <day@geoconinc.com> <br /> Sent: Thursday, March 30, 2017 3:23 PM <br /> To: Michael Kith [EHJ <br /> Cc: Johanna Ferriera oferriera@ci.manteca.ca.us); Steve Walters <br /> (Stephen.Walters@nv5.com);Andy Mantell (andrew.mantell@nv5.com);Jennifer <br /> Williams (Jennifer.Williams@nv5.com); Greg Dickinson (grdickinson@pacificedge- <br /> eng.com); Logan Linderman; Lor Xiong [EH]; Linda Turkatte [EH] <br /> Subject: Manteca Firing Range Results and Additional Excavation Areas <br /> Attachments: E8857-02-02 Addtl Excavation Areas.pdf; E8857-02-02 Sample Locations.pdf, Geocon <br /> Tables.pdf, Geocon Lab.pdf, PacificEdge Lab.pdf; PacificEdge Tables.pdf <br /> Hi, Michael. <br /> See appended for the laboratory results and a map showing the sample locations based on the GPS coordinates. <br /> Based on the lead, CAM 17 metals,tin, and PAH results, lead is the remaining COPC at the site-we have 7 soil sample <br /> 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 proposed <br /> additional excavation limits. Based on the reported concentrations and excavation areas, I estimate one more load of <br /> 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 the week of April <br /> 10 and should be completed in one to two days—we will keep you posted once the 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 1 Principal /Senior Geologist <br /> GEOCON CONSULTANTS, INC. <br /> 6671 Brisa Street, Livermore, California 94550 <br /> P1925.371.5900 ext. 401 M1925.872.5860 <br /> day@geoconinc.com / www.eeoconinc.com / Facebook / Linkedin <br /> Bay Area - Sacramento - Fairfield- Los Angeles - Orange County- Riverside County - Palm Desert - San Diego <br /> Geotechnical Engineering Environmental Services Engineering Geoloey Construction Inspection <br /> Land Development Transportation Infrastructure Institutional Brownfields/Redevelopment Natural Resources <br /> 1 <br />