ARCHIVED REPORTS XR0003064 - Laserfiche WebLink

Home Browse Search

4ZI GE TTL ER - RYAN • October 12, 2000 Mr Bob Cochran Chevron Products Company P O Box 6004 San Ramon, CA 94583 INC. Subject: Third Quarter 2000 Site Update for Former Chevron Station #9-5775, 301 West Kettleman Lane, Lodi, CA (Cleanup and Abatement Order #5-00-704) Mr Cochran This site summary report has been prepared Gettler-Ryan Inc (GR) at the request of Chevron Products Company (Chevron) as required in the subject Cleanup and Abatement Order (CAO) During the third quarter 2000, the soil vapor and groundwater treatment system installed at the site during the second quarter became operational This report documents the startup of the treatment system, and operation and maintenance of the treatment system during the third quarter 2000 The subject site is a former Chevron service station situated on the northwest corner of S Pleasant Avenue and W Kettleman Lane (Figure 1) Former station facilities consisted of a station building, two dispenser islands, three 10,000 -gallon fuel underground storage tanks (USTs) and one 550 -gallon waste oil UST During station demolition in 1998, impacted soil was identified beneath the former fuel USTs Prior to the third quarter 2000, a total of 11 onsite and 8 offsite groundwater monitoring wells, one onsite groundwater extraction well, and four on-site soil vapor extraction wells were installed in the study area Locations of pertinent site features are shown on Figure 2 The site is currently being redeveloped into a automotive service business including carwash and oil change facilities Installation of the remedial systems and associated piping was conducted concurrently with site redevelopment Remedial efforts at the site consist of removal and treatment of hydrocarbon -impacted groundwater and soil vapor as required under Central Valley Regional Water Quality Control Board (CVRWQCB) Cleanup and Abatement Order (CAO) #5-00-704 Currently, the groundwater system (GWS) extracts impacted groundwater from wells EX -1 and MW -14 Extracted groundwater is routed through a particulate filter, then three 2,000 -pound liquid phase activated carbon vessels plumbed in series Chevron discharges treated groundwater to the industrial sewer under City of Lodi Wastewater Discharge Permit 9295 Locations of the treatment system compound and wells EX -1 and MW -14 are shown on Figure 2 A GWS schematic is shown on Figure 3 The soil vapor extraction system (VES) consists of a catalytic oxidizer Soil vapors are extracted from wells VE -1 through VE -4 Treated vapor stream effluent is discharged to the atmosphere under San Joaquin 346408 07 6747 Sierra Court, Suite J - Dublin, California 94568 - (925) 551-7555