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Lisa Medina [EH] <br /> From: Nuel Henderson [EH] <br /> Sent: Wednesday,July 24, 2013 11:05 AM <br /> To: Lisa Medina [EH]. <br /> Subject: RE: 3978 S Hwy 99 - Domestic Well Analyses <br /> Lisa, <br /> I was not aware of the 2012 results, which are good as far as they go. The GW data for the wells shows TPHd and <br /> TPHmo, which cleans up fairly well with silica gel cleanup, but still had some response. Both constituents are typically less <br /> mobile than TPHg, but we should verify their absence in this drinking water well so close to the plume. Due diligence for <br /> everybody is served by testing the well. Based on the 2012 results, the samples only need to be analyzed for TPHd and <br /> TPHmo. <br /> Nuel <br /> From: Lisa Medina [EH] <br /> Sent: Wednesday, July 24, 2013 9:27 AM <br /> To: Nuel Henderson [EH] <br /> Subject: FW: 3978 S Hwy 99 - Domestic Well Analyses <br /> Nuel, <br /> The most recent sampling is attached above. Please advise.Thanks. <br /> Lisa <br /> From: Sobieraj, Justin [mailto•Justin.Sobieraparcadis-us.com] <br /> Sent: Wednesday, July 24, 2013 7:24 AM <br /> To: Lisa Medina [EH] <br /> Cc: Nickens, Amber; Brian A. Waite (BWaite(dchevron.com) <br /> Subject: RE: 3978 S Hwy 99 Domestic Well.Analyses <br /> Lisa- <br /> It is my understanding that domestic well DW-1 was sampled last year due to the property owner's concerns <br /> regarding the 'data gap' between 2006 and 2012. Analytical results from samples collected during 2005, 2006, <br /> and 2012 indicate that this well has not been impacted (all results are 'non-detect').The cross gradient location <br /> of this well to the site further indicates that the well will not be impacted by any of the former site activities. <br /> Could you please clarify why SJEHD would like to have DW-1 sampled again? <br /> Thank you, <br /> Justin Sobieraj,PG I Senior Geologist Ilustiri sobierajCc�arcadis-us.com <br /> ARCADIS U.S., Inc. 12000 Powell Street, 7th Floor l Emeryville, California 94608 <br /> T: 510.596.9684 1 M:415.858.8310 ` <br /> www.arcadis-us.com <br /> ARCADIS, Imagine the result <br /> Please consider the environment before printing this email. <br /> 1 <br />