Laserfiche WebLink
GROUND ZERO ANALYSIS, INC. <br /> 1714 Main Street <br /> Escalon,California 95320-1927 <br /> Telephone (209)838-9888 <br /> Facsimile (209)838-9883g? IV <br /> ED <br /> I L <br /> August 18, 2004 auc <br /> EWPONWNT P�RM�/S�liylCEg TH <br /> Ms Lori Duncan <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Subject Second Quarter 2004 Groundwater Monitoring Report <br /> 640 N El Dorado Street, Stockton, California <br /> Dear Ms Duncan <br /> This letter report presents the results of second quarter 2004 groundwater monitoring and sampling <br /> activities at the subject site (Figure 1) <br /> 1.0 SITE ACTIVITIES <br /> Activities at the site included <br /> Removing free product from well MW3, <br /> Monitoring water level elevations in all site wells, <br /> Purging groundwater from wells MW1 through MW7 and monitoring pH, temperature and <br /> electrical conductivity, <br /> Collecting groundwater samples from wells MW1 through MW7, <br /> Analyzing groundwater samples volatile organic compounds (VOCs), including oxygenated <br /> gasoline additives <br /> 2.0 FIELD WORK <br /> 2.1 Free Product Measurement and Recovery <br /> A Ground Zero technician measured and removed free product from well MW3 periodically during <br /> the reporting period The thickness of measured product during the reporting period ranged from a <br /> high of 0 11 feet on April 26 and June 21, 2004 to 0 03 ft on April 14, 2004 The average thickness <br /> of measured product during the reporting period was 0 08 feet Approximately 7 5 gallons of <br /> product and product/water mixture (including 4 gallons purged prior to sampling) was removed <br /> from well MW3 during the reporting period utilizing a passive skimmer and by manually bailing the <br /> G 1GRQUNDZEIGABBARDIreportsVQMRU004%2QM2004 doe <br />