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. 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 April 8,2004 and June 9,2004 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 CataIytic 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 second quarter, <br /> 2004: <br /> ■ SVE system was 96 percent operational <br /> ■ Average flow rate of 65.8 standard cubic feet per minute <br /> ■ Gasoline, benzene, and MtBE were not detected in influent soil vapor samples. The system was in <br /> compliance with the SJAPCD Air Permit's maximum allowable emissions for benzene of 0.15 lbs/day and <br /> TPHg as 10 lbs/day. SVE system performance data is included in Table A-1. <br /> ■ The SVE system was shut down permanently on 6/9104. <br /> Analytical Data Review <br /> ■ Based on the review of the electronic and hardcopy data (chain-of-custody records, blanks, dilutions, <br /> holding times, LCS/LCSD results, MS/MSD results, and surrogate recoveries), the data are acceptable as <br /> reported by the laboratory with no limitations. <br /> i <br /> I <br /> Attachments: Table A-I - 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 Influent Concentrations <br /> Figure A-2- Soil Vapor Extraction Mass Removal Trend <br /> I <br /> Attachment A-1--Remedial System Field Data Sheets,Analytical Reports,and Chain-of- <br /> I <br /> Custody Documentation <br /> I <br /> JABP-ARCOVern's Fiks)Station No.00548UQmr0410548-Sp performance Eval 2Q04.doc <br />