Laserfiche WebLink
ra <br /> 5 <br /> AT C <br /> ; ter-a ASSOCIATES I N C . <br /> i <br /> concentrations of petroleum hydrocarbons and was discharged to the ground surface. <br /> Groundwater well purge and sample logs are provided in Appendix A. <br /> The groundwater samples collected from each well were submitted with Chain of Custody Record <br /> to Sequoia Analytical in Redwood City, California, ELAP Certification No. 1210. The samples <br /> were analyzed for TPHg and BTEXIMTBE by EPA methods 8015 and 8020, respectively. <br /> E, <br /> Groundwater analytical results are summarized in Table 2. The laboratory analytical reports are <br /> included in Appendix B. <br /> RESULTS OF LABORATORY ANALYSES k <br /> i? <br /> Results of the laboratory analysis of groundwater samples from monitoring wells MW-1, MW-2 <br /> and MW-3 indicate the presence of petroleum hydrocarbons in groundwater in monitoring wells <br /> MW-2 and MW-3. TPHg and BTEX concentrations in wells MW-2 and MW-3 increased since <br /> last quarter. No petroleum hydrocarbons were detected in monitoring well MW-1. The analytical <br /> results are summarized in Table 2. <br /> If you have any questions or comments regarding this matter please contact our office at (209) r <br /> 579-2221. <br /> Respectfully submitted, <br /> ATC Associates Inc. <br /> f <br /> Drew Van Allen r <br /> Staff Scientist Iggiv 'vp <br /> tiaC4�Pity <br /> Jeanne Hornsey, P.E. <br /> CA Registered Civil Engineer No. 47410 I <br /> �, CIVIC. <br /> cc: Dr. A.R. Glover .°:'� <br /> Mark List, RWQCB <br /> Attachments: Table 1, Summary of Groundwater Monitoring Data <br /> Table 2, Summary of Analytical Results-Groundwater <br /> Figure 1, Site Vicinity Map <br /> Figure 2, Groundwater Gradient Map <br /> Appendix A, Groundwater Well Purge and Sample Logs <br /> Appendix B, Laboratory Analytical Results <br /> Y <br /> wA178611repor1s\3gmr1998.doc 3 <br />