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Date: May 17,2004 <br /> Quarter: 1s`Quarter,2004 <br /> APPENDIX A <br /> STATION 0548 REMEDIAL SYSTEM PERFORMANCE EVALUATION <br /> A soil vapor extraction (SVE) system was initiated on September 2000. A brief description and performance <br /> evaluation of the remedial systems between January 13,2004 and March 11,2004 are presented below. <br /> Soil Vapor Extraction System <br /> The SVE system is comprised of 5 SVE wells (VW-1 through VW-5, where VW-5 is a dual completion well with <br /> shallow and deep screen intervals), a King Buck MMC-5A Catalytic Oxidizer (Cat-Ox), and a vacuum extraction <br /> blower as the primary treatment process for the SVE system. The catalytic oxidizer(Cat-Ox)for the SVE system is <br /> currently operating under San Joaquin Valley Unified Air Pollution Control District (SJAPCD) Permit to Operate <br /> #4124 through September 30,2005. SVE system influent data is presented in Tables A-1 and a plot of SVE system <br /> influent soil vapor concentrations is shown as Figure A-2. The following data are the results for the first quarter, <br /> 2004: <br /> • SVE system was 100 percent operational <br /> ■ Average flow rate of 53.2 standard cubic feet per minute <br /> • Removed 14.54 lbs of gasoline, 0.11 lbs of benzene, and 0.25 lbs of MtRE. This complies with the <br /> SJAPCD Air Permit's maximum allowable emissions for benzene of 0.15 lbs/day and TPHg as 10 lbs/day. <br /> 1 SVE system performance data is included in Table A-1. <br /> Analytical Data Review <br /> Based on the review of the electronic and hardcopy data(chain-of-custody records,blanks,dilutions, holding times, <br /> LCS/LCSD results,MS/MSD results,and surrogate recoveries),the data are acceptable as reported by the laboratory <br /> with the following limitations: <br /> • No limitations. <br /> Attachments: Table A-1 - Soil Vapor Extraction System Performance Data <br /> Table A-2 - Soil Vapor Extraction Emission Data <br /> Table A-3 - Operational Uptime of Soil Vapor Extraction System <br /> Table A-4 - Soil Vapor Extraction Wells Status Data Table <br /> Figure A-1 - Soil Vapor Extraction Mass Removal Trend <br /> Figure A-2- Soil Vapor Extraction Influent Concentrations <br /> Attachment A-1--Remedial System Field Data Sheets,Analytical Reports,and Chain-of- <br /> Custody Documentation <br /> K:MproeessW BP ARC0=548\Qaaner1yl1 QTR 0410548-Sys Perforni n Eval EQ04,dm Page A-1 <br />