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Ms Lor] Duncan Project No 880-039 1A 01010000 <br /> May 12, 2004 <br /> Page 5 <br /> r <br /> Approximately 24 pounds of TPHg were removed during the first quarter 2004 The <br /> system performed in compliance with permit requirements Pulsed operation of the SVE <br /> system began in the second quarter 2002, and continued during the first quarter 2004 <br /> Shaw will continue to perform quarterly groundwater sampling The next sampling <br /> event is tentatively scheduled for May 2004 <br /> Please call Mr Herzog at (916) 565-4377, if you have questions regarding this report or <br /> any aspect of the project <br /> .4EPED GEp4O <br /> 11. <br /> Sincerely, ��,,%S @J�� HF,4�o���., <br /> SHAW ENVIRONMENTAL, INC <br /> a � <br /> � N0.7211 � <br /> 90D <br /> Benjamin Chevlen David W Herz <br /> Staff Geologist Project Manager <br /> Attachments Table 1 —Groundwater Monitoring Data <br /> Table 2 —Treatment System Performance Data <br /> Table 3 —Treatment System Emission Rates and Destruction Efficiencies <br /> Table 4— Soil Vapor Extraction System Well Data <br /> Figure 1 — Site Location Map <br /> Figure 2 —Groundwater Elevation Contour Map, First Quarter 2004 <br /> Figure 3 —TPHgBenzene Concentration Map, First Quarter 2004 <br /> Appendix A —Groundwater Monitoring Field Data Sheets <br /> Appendix B —Groundwater Sampling and Analysis Procedures <br /> Appendix C —Groundwater Chain-of-Custody Records and Laboratory <br /> Analysis Reports <br /> Appendix D —Treatment System O&M Field Sheets, Laboratory <br /> Analytical Reports, Cham-of-Custody Documentation <br /> Appendix E—TPHg, Benzene and MTBE Concentrations and <br /> Groundwater Elevations vs Time <br /> cc James Barton, California Regional Water Quality Control Board, Sacramento, CA <br /> Tom Busenbark, San Joaquin Valley Air Pollution Control Board, Modesto, CA <br /> Don Rodgers, 11190 S Union Road, Manteca, CA 95336 <br /> N 1sacDP120041Prj%88018800391 A 4ab doc SHAW ENVIRONMENTAL,INC <br />