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Page 1 of 3 <br /> Vicki McCartney [EH] <br /> From: Vicki McCartney [EH] <br /> Sent: Tuesday, May 20, 2014 4:18 PM <br /> To: 'Javad Masoudi' <br /> Subject: RE: Groundwater Monitoring at 425 Larch Road in Tracy <br /> Good afternoon Javad, <br /> You were very kind to include what was already in the work plan. I just wanted to confirm what wells will be <br /> sampled. <br /> plan to come to the site next week for the sampling event. It sounds like only the depth-to-water measurements <br /> will be done on Tuesday, May 27, and the sampling of wells will take place Wednesday through Friday. <br /> I plan to bring two or three staff with me. They are being trained in my unit and want to observe low-flow/micro- <br /> purge method. <br /> I hope the sampling technician is ready to explain everything because I know that there will be questions. <br /> Thank you, Javad. <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(asjcehd.com <br /> ,,.1 i•[�N.N. <br /> From: Javad Masoudi [mailto:jmasoudi@emscorp.us] <br /> Sent: Tuesday, May 20, 2014 9:48 AM <br /> To: Vicki McCartney [EH] <br /> Subject: RE: Groundwater Monitoring at 425 Larch Road in Tracy <br /> Dear Vicki, <br /> There are 28 groundwater monitoring wells and 11 dual-phase extraction wells at this site. It is <br /> planned to abandon 14 un-necessary wells. EMS has scheduled monitoring and sampling the <br /> remaining 25 wells in order to update the groundwater data and conditions. These wells are MW- <br /> 1, MW-2, MW-4, MW-5, MW-8, MW-9, MW-13, and MW-17 through MW-28, DPEI, DPE2, <br /> DPE3, DPE6, DPE8, and DPEI 1. <br /> EMS proposes to purge and sample the wells following Low-Flow/Micro-Purge Method. A <br /> pneumatic pump will be used for purging and sampling the wells. The pump intake for the <br /> shallow wells will be set at about 13 feet+/- bgs. The pump intake for the deep wells (MW-13 and <br /> MW-18) will be set at 35 feet bgs. In addition, three MTBE-impacted wells (DPE3, MW-17, and <br /> MW-19) will be purged and sampled following 3- to 5-well-water-volume method. One <br /> equipment blank per each sampling day and one duplicate sample per every 10 samples will be <br /> collected for QA/QC purposes. <br /> The water samples will be analyzed for TPH-g and VOCs including fuel oxygenates. The <br /> laboratory analysis of water samples will be performed by a laboratory licensed by the State of <br /> 5/20/2014 <br />