Laserfiche WebLink
Chevron Products Company 2 <br /> Chevron Service Station 49-4275 2905 Ben anon Holt Dnve Stockton,CA November 5 2002 <br /> Air Sparge System <br /> The AS system includes nine AS wells (GM-1 through GM-9), underground piping, and <br /> a 1 5-hp rotary vane air compressor The AS system infects air into wells GM-1 through <br /> GM-9 <br /> During the reporting period, the AS system was 91% operational The AS system <br /> operated at an average flow rate of 217 standard cubic feet per nunute (scfm) and an <br /> average infection pressure of 9 5 pounds per square inch gauge (psig) Remediation <br /> system field data sheets are presented in Attachment A Air sparge operational data, <br /> including flow rate and applied pressure data, are presented in Table 1 Dissolved <br /> oxygen concentrations for wells MW-1 through MW-4 and MW-6 through MW-9 are <br /> presented in Table 2 <br /> Conclusions <br /> • The SVE system remains inactive pending a determination from Chevron to <br /> reactivate or modify the existing system <br /> • The AS system continues to operate, infecting air into the groundwater, which <br /> provides oxygen for in-situ bioremediation <br /> If you have any questions or require additional information, please contact Bob Jackson <br /> at (916) 861-0400 x 283 or Greg McIver at (916) 861-0400 x 279 <br /> Sincerely, <br /> SECOR International Incorporated <br /> Bob W Jackson Jr G clver <br /> Staff Geologist Project Manager <br /> Attachments Table 1 - Ayr Sparge System Operational Data <br /> Table 2 - Dissolved Oxygen Well Concentrations (mg/L) <br /> Figure 1 - Site Location Map <br /> Figure 2 - Site Plan <br /> Attachment A— Remediation System Field Data Sheets <br /> cc Ms Lori Duncan, San Joaquin Environmental Health Department <br /> Mr Marty Hartzell, California Regional Water Quality Control Board <br /> 1\Chevron1942751Penod1c Monitonng12002 O&W3Qi12 O&M Report doc <br />