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I <br /> I • Quarterly Report - Second and Third Q y p Quarters 2003 <br /> LODITHEATER <br /> 107 North School Street, Lodi, California <br /> I1.0. INTRODUCTION <br /> At the request of Mr Edward Barkett of Lodi City Center 12 LLC,Advanced GeoEnvironmental, <br /> Inc (AGE) has prepared this report of environmental activities at 107 North School Street, Lodi, <br /> California Soil vapor extraction/in-situ air sparging (SVE/IAS) monitoring and sampling events <br /> were performed between March and September 2003 and a ground water monitoring event was <br /> conducted on 28 August 2003 The location of the site and its surroundings are illustrated in Figure <br /> 1 Structures and well locations associated with the site are depicted in Figure 2 <br /> Background information and previous site investigation activities were described in the AGE- <br /> prepared Corrective Action Plan, dated 10 June 1999 <br /> I <br /> 2.0. PROCEDURES <br /> IField procedures for ground water monitoring and sampling, and soil vapor extraction monitoring <br /> are described below All field work was performed in accordance with Central Valley Regional <br /> IWater Quality Control Board(CVRWQCB)guidelines for investigation ofunderground storage tank <br /> (UST)sites,ground water sampling was conducted in accordance with guideline for monitoring well <br /> sampling issued by the San Joaquin County Environmental Health Department (EHD) <br /> I <br /> I2 1 WELL MONITORING AND EVACUATION <br /> On 28 August 2003, a Solmst water level meter was used to measure the depth to ground water in <br /> I monitoring wells MW-2 and MW-4 through MW-8 relative to the tops of the well casings The <br /> ground water elevations and gradient were determined from these data (Table 1) <br /> After recording water level measurements, a dedicated disposable bailer was used to purge each <br /> monitoring well of standing water Between 2 and 4 5 gallons of water(a minimum of 3 casing-well <br /> water volumes)were removed from each well Groundwater temperature,pH and conductivity were <br /> I measured at regular intervals during purging using an Oakton water analyzer Field sheets and data <br /> are included in Appendix A Purged water was stored on-site in labeled, 55-gallon,DOT-approved <br /> drums <br /> I <br /> 2 2 COLLECTION OF GROUND WATER SAMPLES <br /> IWater samples were collected from the monitoring wells using the dedicated disposable plastic <br /> . bailers after allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume <br /> IAdvanced GeoEnvironmento,Inc <br /> I <br />