Laserfiche WebLink
N lr: <br /> 2 <br /> Chevron Products Company <br /> Chevron Service Station#9-4275,2905 Ben armn Hott Drive Stockton,CA May 18,1999 <br /> i Air Sparging System <br /> The AS system is comprised of nine AS wells (GM-1 through GM-9) and a 1 5-hp rotary <br /> vane compressor The AS system alternately injects air into wells GM-1 through GM-5 <br /> and wells GM-6 through GM-9 <br /> During the reporting period, the AS system was 100 percent operational The AS system <br /> operated at an average flow rate of 13 3 cfin at an average injection pressure of 10 0 <br /> pounds per square inch Air sparge operational data, including flow rate and applied <br /> pressure data, are presented in Table 1 <br /> Dissolved oxygen (DO) concentrations were measured in site monitoring wells on March T <br /> 10, 1999 and averaged 2 1 mgll-, a slight increase from the previous quarterly data <br /> Current and historical DO concentrations are summarized in Table 2 <br /> Conclusions <br /> The SVE system will remain shutdown until water levels have dropped and exposed a <br /> sufficient length of screen in the SVE wells The AS system will continue to be operated <br /> to inject air into the groundwater and provide oxygen for biodegradation <br /> If you have any questions or require additional information, please do not hesitate to call <br /> ® me at (916) 364-1880 <br /> Sincerely, <br /> SECOR International Incorporated <br /> Rusty E Benkosky, P E <br /> - ` Project Engineer - <br /> Attachments Table 1 - Air 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—Remedial System Field Data Sheets <br /> cc Ms Lon Duncan, San Joaquin Environmental Health Department <br /> Mr Paul Supple, ARCO Products Company <br /> Mr Mark List, Regional Water Quality Control Board <br /> 76007-032-0119-4275 O&M 1 Q99 Report doc <br />