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Mr Harlin Knoll <br /> Page 3 of 3 <br /> • present at the site above laboratory detection linuts MTBE concentrations in wells MW 1, <br /> MW3, and MW4 continue to exceed the drinking water standard (13 ppb) established by the <br /> State of California <br /> 5.0 RECONIlVI ENDATIONS <br /> • Discontinue TPHd, TPHg, and BTEX analysis due to the continual non-detectable (ND) results in <br /> wells MW 1 through MW4 <br /> • Analyze wells MWl through MW4 exclusively for MTBE MTBE appears to be the only <br /> chemical of concern compromising the groundwater at the site <br /> Pursuant to a request by the San Joaquin County Environmental Health Department (EHD), three <br /> additional groundwater monitoring wells will be installed to further define the extern of MTBE <br /> contanunation in the groundwater A workplan for the well installation will be subnutted under <br /> separate cover We anticipate installing the additional wells and conducting the next round of <br /> groundwater sampling in June 2002 <br /> Please feel free to contact Ground Zero at your convenience (209-838-9888) if you have any questions <br /> or comments <br /> • Respectfully, RED GF <br /> Ground Zero Analysis, Inc <br /> JOHN P fel <br /> LANE o <br /> John P Lane CP <br /> No 6795 <br /> CA Registered Geologist No 6795 <br /> Attachments <br /> cc Mr Marty Hartzell, RWQCB <br /> Mr Patrick D Riddle, Attorney at Law <br /> Mr Art Wyatt, Barnyard Corporation <br /> harnYard/reporWgn rltQM2002 doc <br />