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Third Quarter 1992 Groundwater Monitoring Report <br />Comgan Property, Stockton, California <br />October 15, 1992 <br />Page 2 <br />All purged water was contained in DOT approved drums and left on site pending laboratory <br />analyses Water containing nondetectable concentrations of BTEX and TPHG will be disposed <br />of at the site by dumping the water within the planters <br />Laboratory analysis determined that no petroleum hydrocarbon constituents were present in the <br />samples from wells MW1 and MW3 Monitoring well MW2 contained nondetectable analytes <br />except for xylenes at 0 6 parts per billion (ppb), which is lust above the method detection limit <br />of 0 5 ppb The primary maximum contaminant level (MCL) for xylene is 1750 ppb <br />Laboratory reports with chain -of -custody documents are presented In Attachment 2 Table 2 <br />summarizes laboratory results since March 1991 <br />If you have any questions or need any additional information regarding this project, please <br />contact me at (209) 838-3507 <br />Respectfully, <br />RESNA Industries <br />• <br />A-- <br />Jo PLane <br />Project Geologist <br />Gregory P Stahl <br />CA Registered Geologist No 5023 <br />Attachments <br />PC Ms Zona Corrigan <br />Mr Lee Helms, Cyr Realtors <br />Mr G L Boggs, CA RWQCB <br />OR101292 MRM <br />