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Mr Harlin Knoll <br /> Page 3 of 3 <br /> • • MTBE concentrations in groundwater exceeded the pnmary MCL of 13 ppb in wells MW3 and <br /> MW4 MTBE exceeded the secondary MCL of 5 0 ppb in wells MW3, MW4, and MW5 <br /> 5.0 RECOMMENDATIONS <br /> The MTBE plume beneath the site has been generally defined, and is decreasing in size and <br /> concentration Ground Zero recommends that San Joaquin County Environmental Health Department <br /> (EHD) consider closing this site as a low-risk groundwater contamination case <br /> Please feel free to contact Ground Zero at your convenience (209-838-9888) if you have any questions <br /> or comments <br /> Respectfully, <br /> Ground Zero Analysis, Inc <br /> ED G <br /> Sean Lkeyy J0 'u, <br /> Staff Geologist o �r4`� <br /> !10 6795 <br /> John P Lane <br /> • CA Registered Geologist No 6795 <br /> Attachments <br /> cc Mr James L L Barton, RWQCB <br /> Mr Patrick D Riddle, Attorney at Law <br /> Mr Art Wyatt, Barnyard Corporation <br /> I <br /> • <br /> G 1GROUNDZEIBarnyard-Mamer\ReportslQMR1200311 QM2003 doc <br />