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• Page 2 of 3 <br /> MW-8, MW-102, OW-1, OW-2 and domestic well 1697 Durham Ferry Road (TPHg, BTEX, <br /> MTBE and 1,2-DCA by EPA method 8260B) <br /> Fourth Ouarter <br /> • Quarterly performance monitoring: MW-1, MW-2,MW-7, MW-101, OW-1 and OW-2 <br /> • Depth to water measurements only : MW-2X, MW-101, MW-102, MW-201, MW-202 <br /> • Groundwater analysis and DTW measurements: MW-1, MW-2, MW-7, MW-8, OW-1 and <br /> OW-2 (TPHg, BTEX, MTBE and 1,2-DCA by EPA method 826013) <br /> From: Vicki McCartney [EH] [mailto:vmccartney@sjcehd.com] <br /> Sent: Thursday, November 13, 2014 4:30 PM <br /> To: Eric Price <br /> Subject: RE: 1600 Durham Ferry Road <br /> Hi Eric, <br /> Thank you for informing me that AS-7 has not been installed. <br /> I still have questions about the wells that are being checked for depth-to-water. What is the rationale for <br /> choosing these wells each quarter? <br /> Vicki McCartney, Senior REHS <br /> San Joaquin County <br /> Environmental Health Department <br /> 1868 East Hazelton Avenue <br /> Stockton, California 95205 <br /> Phone: (209)468-9852 <br /> Email: vmccartney(asicehd.com <br /> From, Eric Price fmailto•EPrice2groundzeroanalysis.com] <br /> Sent: Thursday, November 13, 2014 3:31 PM <br /> To: Vicki McCartney [EH] <br /> Subject: RE: 1600 Durham Ferry Road <br /> Hello Vicki, <br /> 1. AS-7 was not installed.Andrew is preparing a brief well installation report.There were <br /> several complications in installing a well in that location:A rig could not be used because of <br /> the ceiling and an angle boring or hand auger could not be employed because the annulus <br /> would collapse once we were below the water table.Thinking of alternatives. <br /> 2. No changes to the standard monitoring procedure. I just wanted to formalize the routine <br /> that is currently be conducted.The Work Plan lists only the wells we have access to for <br /> monitoring. Domestic well 31448,SW-101, MW-6 and MW-106 are no longer monitored <br /> because of restricted access.We shut the air sparging system off about 7 to 10 days prior <br /> to monitoring the wells,so any mounding will rebalance with the natural water table. <br /> On a side note.The new extraction wells are really working well.We've collected two vapor <br /> samples to date with TPHg levels of 4.1 million ug/m3 and 1.1 million ug/m3, respectively. Reports <br /> to follow. <br /> 11/18/2014 <br />