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CIO logteaI ToChnics Inc Page 6 ' Groundwater Monitoring Report Project No 425 2 November 8,2005 the well Groundwater parameter stabilization was characterized by three successive readings ' within 10% Before a sample was collected, the well's water level was allowed to recharge to at least 80% ' of its initial level MW-8 and MW-106 showed slow recharge and were sampled after returning to at least 65% of their initial level All the water removed from the monitoring wells and not used as a sample was placed in a properly labeled 55 gallon DOT (Department ' of Transportation 17-H) approved container and temporarily stored on-site A Waterra® pump with dedicated tubing was used to collect each sample Extreme care was exercised while collecting samples to prevent agitation of the water contained in the bailer Water samples were transferred from the bailer into 40-m1 VOA vials preserved with hydrochloric acid using a bottom-emptying device that minimizes sample aeration during transfer of the sample All samples were checked for headspace bubbles, labeled, inserted into foam holders and placed into a cooled ice chest for transport to the laboratory The sampling technician wore disposable gloves while collecting all samples ' A chain of custody document, listing all samples collected and their intended analyses, accompanied the samples from field to the laboratory, thereby providing a means to track the movement and insure the integrity of the samples 2.2 Laboratory Analysis—Monitoring Wells Thesam les roundwater collected on Jul 20, 2005 were delivered to Excelchem g p Y Environmental Labs (California Certification # 2119), of Roseville, California, for analysis ' The samples were analyzed using the following methods • BTEX--EPA method 8260B ' • TPH-Gasoline—EPA method 8260B • MTBE—EPA method 8260B ' The lab results for the above analysis are summarized in Tables 7 through 9 of Appendix A, and the laboratory data are presented in Appendix B Analytical results are discussed in ' Section 3 0 As required under AB2886, the laboratory data were submitted electronically to GeoTracker ' on November 7, 2005 and the confirmation number is 7441491246 2.3 Groundwater Sampling Procedure—Domestic Wells On July 20, 2005, Del-Tech personnel arrived on site, purged and sampled three domestic wells within a 500-foot radius of the site The hose bib closest to each of the domestic wells