Laserfiche WebLink
rAMBRIA <br /> 0 <br /> MASS REMOVAL BY GROUNDWATER EXTRACTION <br /> Constituent Total Removed <br /> Total Hydrocarbons 1.8 pounds <br /> MTBE 15.2 pounds <br /> Water 2,295,500 gallons <br /> ANTICIPATED FIRST QUARTER 2005 ACTIVITIES <br /> E Blaine will gauge and sample the site wells according to the existing sampling schedule and <br /> tabulate the data. Cambria will prepare a groundwater monitoring report. Groundwater samples <br /> will be collected monthly from well MW-6A and these data will be reported via facsimile as we <br /> receive them from the lab. <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> The concentration of gasoline constituents in groundwater beneath the site continue to remain low <br /> l <br /> or below detection limits. Cambria will be preparing a closure request for this site and will <br /> submit this request to the San Joaquin County Environmental Health Department (SJCEHD) for <br /> I review. In the mean time we have the following recommendations for this site. <br /> Remediation System Dismantlement: Cambria,on behalf of Shell,is requesting permission from <br /> SJCEHD to dismantle and remove the groundwater extraction and treatment system at this site. o <br /> This remediation system has been shut off for more than three years and we have not seen any <br /> rebound in groundwater concentrations. We believe there is no reason to keep the remediation <br /> system in.place at this site. <br /> Discontinue Monthly Groundwater Sampling: Well MW-6A has been sampled on a monthly <br /> basis for more than two years to monitor sporadic detections of methyl tertiary butyl ether <br /> (MTBE). Over the past two years MTBE has been below the detection limit more often than it <br /> has been detected. None of the detections of MTBE over the past two years have been over the <br /> California Maximum Contaminant Level (MCL) for MTBE. We recommend discontinuing i< <br /> E monthly sampling of MW-6A. J u <br /> f <br /> Sample Frequency Reduction: Due to the continued pattern of low to non-detect levels of <br /> 0324 2 <br />