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r f ' Quarterly Report - First Quarter 2004 FERNANDO'S PLACE ' ' u 1201 South Center Street, Stockton, California 1.0. INTRODUCTION At the request of Mr Roger Huckins,'Advanced GeoEnvironmental, Inc (AGE) has prepared this- quarterly ground water monitoring report for the property located at 1201 South Center Street, Stockton,California(site),The scope ofwork included monitoring and sampling the nine monitoring ' wells on and off-site and preparation of this report The location'of the site is Illustrated in Figure 1 Locations of structures, bonngs and monitoring wells related to the site are Illustrated in Figure 2 Site background information is provided in Appendix A 2.0. PROCEDURES The February 2004 monitoring event was performed In accordance with Central Valley Regional Water Quality Control Board (CVRWQCB) and San Joaquin County Environmental Health ' Department (EHD) guidelines for investigation of underground storage tank (UST) sites and for sampling ground water monitoring wells, respectively 2 1 WELL MONITORING AND EVACUATION Between 14 and 27 February 2004, ground water monitoring and sampling was performed at one single-completed ground water monitoring well(MW-1),two cluster-type ground water monitoring wells(MW-2AB and MW-3AB)and six multi-chambered ground water monitoring wells(MW-4 , ' thrdugli MW-9) Depth to water data is Included in Table 1 Due to scheduling conflicts,the ground water monitoring could riot be completed concurrently with the neighboring Arc Pump and Weld ' site r On 24 February 2004, a Solinstwater level meter was used to measure the depth to water in all the ' wells to the nearest 0 01 foot, relative to the top of the well casing Between 25 and 27 February 2004, approximately 6 to 45 gallons of ground water(a minimum of three casing-water volumes per well) were,evacuated (purged) from single-level wells MW-1, MW-2A, MW-2B, MW-3A and ' MW-313 utilizing disposable polyethylene bailers or a Watera inertial pump equipped with 5/8-inch diameter polyethylene tubing and a check valve Multi-level monitoring wells MW-4 through MW-9 were purged utilizing a Watera inertial pump equipped�with 3/8-inch diameter polyethylene tubing ' and a check valve Approkimately 0 75 to 6 gallons of ground water (a minimum of three casing- i water volumes per well) were,purged from the multi-level monrtonng wells , ' Temperature,pH and conductivity were measured for stabilization at regular purge-volume intervals from each well using an Oakton water analyzer Field data and logs are provided in Appendix B ' Advanced GeoEnvironmental,Inc F i r } , I F