ARCHIVED REPORTS XR0003057 - Laserfiche WebLink

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6ETTLER-RYAN INC. July 19, 2000 Mr Richard C Prima, Jr r City of Lodi Public Works Director '--' c� 221 W Pine Street Lodi, CA 95240 Subject Accidental Discharge Report, Wastewater Discharge Permit #295, Former Chevron Station #9-5775,301 West Kettleman Lane, Lodi, CA Mr Prima Gettler-Ryan Inc (GR) has been contracted by Chevron Products Company (Chevron) to operate and maintain the groundwater system installed at the subject site GR prepared tills report to document an unintentional discharge of hydrocarbon -impacted water from the groundwater system (GWS) to the City of Lodi industrial sewer Extraction and treatment of groundwater at the subject site was initiated on July 3, 2000 The GWS extracts impacted groundwater from well EX -1 Extracted groundwater is routed through a particulate filter, then three 2,000 -pound liquid phase activated carbon vessels plumbed in series Locations of the treatment system compound and well EX -1 are shown on Figure 2 A treatment system schematic is shown on Figure 3 Operation of the GWS was initiated on July 3, 2000 Prior to GWS start-up the system had been charged with potable tap water Therefore, samples were not collected from the GWS until July 6, 2000, to allow the tap water to be discharged At that time approximately 560 gallons had been pumped through the system. Analytical results were received on the afternoon of July 7, 2000 Very low concentrations of Total Petroleum Hydrocarbons reported as gasoline (TPHg), toluene or xylenes were detected in the mid -point samples and the effluent TPHg, xylene and total BTEX concentrations in the effluent sample exceeded permit conditions, and the GWS was immediately shut down A GR returned to the site on July 10, 2000, to clean and re -sample the system All system hoses, fittings, and sampling ports were steam -cleaned, then the GWS re -started while discharging to a holding tank Sample,, were collected from each of the sampling ports Then approximately 1,200 gallons of potable tap water were. pumped through the GWS, and a second set of samples collected Analytical data from the first set of samples were received on the morning of July 11, 2000, and indicated that hydrocarbons were present only in the influent sample These results were discussed with Mr Frank Beeler of the City of Lodi Public Work,, Department, who authorized re -starting the GWE GR re -started the GWS on July 11, 2000, discharging to the industrial sewer Analytical data from the second set of samples were received late in the afternoon of July l 1, 2000 Hydrocarbons were only detected in the influent sample The analytical data are summarized on Table 1 Copies of the analytical reports are attached Is 346408 07 6747 Sierra Court, Suite J - Dublin, California 94568 - (925) 551-7555