Laserfiche WebLink
I <br /> Quarterly Report - First Quarter 2004 <br /> • PREM DOR <br />' 433 West Scotts Avenue, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request of Dr Olbrantz of Masonite International,Advanced GeoEnv>ronmental,Inc (AGE) <br />' has prepared this quarterly report for the property located at 433 West Scotts Avenue, Stockton, <br /> California(site) The site and the surrounding area are illustrated on Figure I Structures and boring <br /> and well locations are illustrated on Figure 2 Additional site background information is summarized <br />' in Appendix A <br />' 2.0. PROCEDURES <br />' On 21 January 2003, ground water monitoring was performed on monitoring wells MW-I through <br /> MW-3 Field work was performed in accordance with guidelines issued by San Joaquin County <br /> Environmental Health Department (EHD) for the sampling of ground water monitoring wells and <br /> I Central Valley Regional Water Quality Control Board(CVRWQCB)guidelines for investigation of <br /> underground storage tank (UST) sites <br /> 2 1 WELL MONITORING AND EVACUATION <br /> The depth to ground water in each monitoring well was measured from the top of the well casing to <br /> the nearest 0 01-foot utilizing a Sohnst water level meter Ground water elevation in each well was <br /> calculated by subtracting the measured depth to ground water from the surveyed casing elevation <br /> (Table 3) <br /> After water levels were measured,approximately 8 0 gallons of water(a minimum of 3 casing-water <br />' volumes per well) were purged from monitoring wells MW-1 through MW-3 using a dedicated <br /> Waterra hose bailer MW-I drew down slightly during purging but rebounded for sampling within <br />' 15 minutes Ground water temperature, pH and conductivity were measured at regular intervals <br /> during purging using an Oakton water analyzer Field sheets and data are included in Appendix B <br /> Purged water was stored on-site mproperly labeled,55-gallon Department of Transportation(DOT)- <br /> approved drums <br />' 2 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES <br /> Water samples were collected from each purged well using a dedicated inertia pump hose after <br />' allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume Each water <br /> sample was transferred into laboratory-supplied 40-m1 volatile organic analysis (VOA) vials <br />' Advanced Geo E nvi ron mental,Inc <br /> 1 <br />