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. Navarra Site:Potable Water4upply Well Program Page 7 of 7 <br /> absent from groundwater at the Navarra Site. <br /> The lead scavengers EDB and 1,2 DCA were not included in the suite of analytes <br /> specified by the SJCEHD at the time groundwater quality-monitoring was initiated at this <br /> site in 2000. However, their inclusion was recommended by SJC as matter of good <br /> professional practice sites affected by releases of gasoline (The San Joaquin Company <br /> Inc. Memorandum from Dai Watkins to Bernie Dietz dated May 2, 2000, with copy to Ms <br /> Lori Duncan, REHS, San Joaquin County Public Health Services Environmental Health <br /> Division. May 2, 2000), and they were included in the first round of groundwater-quality <br /> monitoring that was conducted on May 11, 2000. Neither was detected. That finding <br /> permitted the SJCEHD, at that time, to approve elimination of analyses for 1,2 DCA and <br /> EDB from the suite of analytes included in the groundwater-quality monitoring program. <br /> When, in response to your request, EDB and 1,2 DCA were ;;again included in the <br /> analytical suite used in the most recent round of groundwater monitoring that <br /> encompassed a total of 27 groundwater-quality monitoring wells-and six potable water- <br /> quality monitoring wells,both were, as was expected by SJC, again entirely absent. <br /> As requested by that Agency, we have transmitted a copy of this letter to Mr. James <br /> Barton at the Regional Water Quality Control Board - Central Valley Region (RWQCB). <br /> If you can authorize our proposed revised program for the potable water supply wells, or <br /> if you have any questions, please call me at (510) 336-9118. <br /> Sincerely, <br /> D. J. Jatkins, PhD, PE �µOFEMS se <br /> Geotechnical Engineer WAT�� <br /> The San Joaquin Company Inc. O• �f, <br /> No. 882 <br /> cc: Mr. James Barton, RG, Central Valley RWQCB exp. <br /> 3/31106 <br /> Mr. Carl Navarra <br /> OfiCAL1 <br /> Attch.: Site Plan <br /> Tables 1 and 2 <br /> Well Completion Reports (3) <br />