ARCHIVED REPORTS_XR0008340 - Laserfiche WebLink

Home Browse Search

S EC ® R • Mr Michael Infurna—SJCEHD March 13, 2003 Page 6 Remediation System Performance Summary Soil vapor extraction was initiated at the site on September 26, 2002, under Authority to Construct number N-4613-1-0, issued by the San Joaquin Valley Air Pollution Control District (SJVAPCD) Ozone sparging was initiated at the site on November 20, 2002 Operation and maintenance (O&M) of the remediation system is performed on a weekly basis A brief description and performance evaluation of the remedial system between January 16 and February 5, 2003, is presented below SVE System The soil vapor extraction (SVE) system is comprised of ten SVE wells (VE-1 through VE-10) and utilizes a Solleco TCAT 500 scfm catalytic oxidizer as the abatement device During the first quarter 2003, the SVE system was approximately 100% operational, and the SVE system removed approximately 222 9 pounds of TPHg, 3 3 pounds of benzene, and 0 pounds of MtBE SVE system operational and analytical data including hours of operation, applied vacuum, flow rate, ambient dilution status, field FID, influent TPHg and benzene concentrations, and mass removal data are presented in Table 5 MtBE removal data is presented in Table 6 A summary of the emissions data is supplied in Table 7 SVE well data, including open/closed status, vacuum, flow, and FID data are presented in Table 8 Graphical presentation of TPHg and benzene mass removal and influent concentration data are shown on Figures 6 and 7 Copies of the O&M field notes are included in Attachment 1 Influent and effluent vapor sample laboratory analytical reports are included in Attachment 2 Ozone Spargeng System 3 An ozone generator, enclosed in a wooden shed, injects ozone into groundwater in 20 ozone sparge wells (S-1 through S-20) located onsite and offsite A ozone meter installed in the shed will shut down the remediation system if the sensor detects excessive ozone levels greater than 0 01 ppm within the shed The ozone injection manifold is set up to inject ozone for 10 minutes at a time into the sparge wells It can cycle through 10 wells at 100% the maximum injection rate, or all 20 wells (two wells at a tame) at 50% the maximum injection rate With either arrangement, approximately, 2 5 pounds of ozone (total for all wells) is injected into the subsurface each day After system startup on November 26, 2002, several ozone leaks were detected at the injection manifold and were repaired O&M has since been performed weekly to record ozone sparge operational data such as ozone concentrations and hours of operation, and to check for leaks at the ozone injection manifold and the ozone sparge wellheads During the first quarter 2003, ozone was not detected around any ozone sparge well boxes or inside the compound Historical operational data including well open/closed status, flow rate, and applied pressure data are presented in Table 9 Future Work Future work planned in the second quarter 2003 include the following tasks + Transfer site to new environmental consultant to perform future environmental work r Riverbank-03-10 doe SECOR lntematronal Incorporated 5