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Mr Martin Hams <br /> Page 3 of 3 <br /> • Methyl tert butyl ether (MTBE) was detected in wells MW1 and MW3 at concentrations of 26 ppb <br /> and 7 5 ppb, respectively No MTBE was detected in well MW2 or well MW4 No other oxygenated <br /> gasoline additives or lead scavengers were detected in any site well <br /> Analytical results are summarized in Table 2 Attachment B contains laboratory reports and chain of <br /> custody documentation <br /> Summary <br /> Groundwater levels beneath the site fell approximately one foot between March 22, 2002 and March 7, <br /> 2003 Shallow groundwater flow in March 2003 was toward the west-northwest Low levels of <br /> benzene, ethylbenzene, and xylenes were detected in well MW 1 Low levels of TPHg were detected in <br /> wells MW 1 and MW2 Low levels of MTBE were detected in wells MW 1 and MW3 <br /> Recommendations <br /> Ground Zero recommends that groundwater samples be collected from the site facility well and the <br /> nearest domestic well for analysis of gasoline constituents including TPHg, BTEX, and MTBE <br /> Copies of this report should be forwarded to Ms Lon Duncan of EHD and Mr James L L Barton of <br /> the California Regional Water Quality Control Board, Central Valley Region(RWQCB) <br /> r• <br /> Please feel free to contact Ground Zero at {209} $3$-9888 should you have any questions regarding <br /> this submittal <br /> Respectfully, ��AED GFO <br /> Ground Zero Analysis, Inc �O <br /> JOHN P <br /> LANc" <br /> No 6795 <br /> John P Lane <br /> CA Registered Geologist No 6795F OF CA <br /> A�,FO <br /> Attachments <br /> JL/bv <br /> • <br /> 0 IGROUNDZF,\TWMoy\Reports\QMRXIQM2003 doc <br />