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Mr Mike Infurna <br /> Page 3 <br /> SAMPLING AND ANALYSIS OF WATER SUPPLY WELLS AT PRECISION FENCE <br /> Two unregistered water supply wells were recently discovered at Precision Fence Co in close <br /> proximity to impacted monitoring well MW5 (Figure 2 and Figure 6) Water samples were <br /> collected from both supply wells on March 31, 2004 The samples were submitted to FGL <br /> Laboratories for analysis The suite of analyses consisted of BTEX, oxygenates, 1,2-DCA and <br /> EDB by EPA Methods 8260 and 524 2 No detectable concentration of any analyte was found by <br /> either method Field notes are included in Attachment A Analytical data are summarized in Tables <br /> 4 and 5 Laboratory reports and chain of custody documentation are included in Attachment C <br /> SUMMARY <br /> All site monitoring wells and two offsite supply wells were sampled Concentrations of <br /> petroleum hydrocarbons in the monitoring wells were similar to those recorded in the past 1,2- <br /> DCA was detected in all A and B Zone wells except for wells MW3 and MW7, which are both to <br /> the east of the former tankpit 1,2-DCA was not detected in deep well MW11) No analytes were <br /> detected in the samples from the two water supply wells at Precision Fence Co <br /> The next groundwater sampling event is scheduled for June, 2004 If you have any questions or <br /> comments please contact Ground Zero at your convenience <br /> . Respectfully, <br /> Ground Zero Analysis, nc <br /> Y I jjl <br /> —e;;Z — � D �O <br /> Sean Garvey, <br /> Staff Geologist <br /> GRs AHL <br /> ----� * f <br /> Gregory P Stahl, RG 5023 No. 5423 <br /> CA Certified Hydrogeologist No 264 <br /> OF CAl1F <br /> Attachments <br /> cc Mr and Mrs John Ferraiolo <br /> Mr Jeff Greenberg, Esq <br /> Mr James L L Barton, CA Regional Water Quality Control Board <br /> Ms Marla Nahorn, Environmental Closures <br /> Mr Steve Woodhull, Blaes Environmental <br /> • <br /> 11GZA—FSIVOL 11DATAIGROUNDZEIHARRYS1Reports\QMR11QM2004a doe <br />