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. v o <br /> • A S S O C I A T E S I N C <br /> collected from monitoring well MW-7 These observations should be bourne out by the continued <br /> monitoring and sampling of groundwater at the site <br /> Despite the properties of the materials beneath the site being favorable to retarding the spread of the <br /> MTBE plume In groundwater, it Is ATC's opinion that the elevated concentrations of MTBE detected in <br /> water samples collected from monitoring well MW-7 (over 120,000 ug/1) and the existence of on-site and <br /> off-site sensitive receptors (domestic well and waterway) are a matter that should require further <br /> response Therefore, ATC Associates recommends the following <br /> • Preparation of a Problem Assessment Report (PAR) for this site that includes an evaluation of <br /> the remedial alternatives, including a no further action alternative <br /> • Continue quarterly groundwater monitoring and sampling, Including the on-site domestic well <br /> and adjacent waterway <br /> If you have any questions or require additional information regarding this report, please contact us at <br /> (209) 579-2221 <br /> Respectfully submitted, <br /> ATC Associates Inc <br /> Y V <br /> William G Shipp, RG No 6115, CHG No 537 <br /> Senior Project Manager <br /> J nne Hornsey, P E <br /> Registered Engineer No C47410 <br /> Attachments <br /> cc Mr James "J"Mills, Westrec Marinas <br /> Mr Marty Hartzell, RWQCB <br /> w 1625141reponslstatusreport doe <br />