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1 <br /> Quarterly Report - Second Quarter 1999 <br /> Shockey and Sons Trucking <br /> 850 Milgeo Avenue, Ripon, California <br /> ' 1.0. INTRODUCTION <br /> ' At the request of Mr. Lee Shockey, Advanced GeoEnvironmental, Inc. (AGE) has prepared this <br /> Quarterly Report for the site located at 850 Milgeo Avenue, Ripon, California(the site). The scope <br /> of work included installation of six soil probe borings and monitoring four ground water monitoring <br /> t wells. The location of the site and its surroundings are depicted in Figure 1. Monitoring wells,probe <br /> boring locations and structures on the site are shown in Figure 2. <br /> Site history and findings from previous investigations and previous monitoring events at the site are <br /> detailed in the Preliminary Investigation and Evaluation Report dated 15 August 1996,prepared by <br /> AGE. <br /> 2.0. PROCEDURES <br /> Ground water samples were collected from monitoring wells, soil borings for the collection of soil <br /> and ground water samples were advanced at the site during the seconds quarter of 1999. All work <br /> was conducted in accordance with InvestigationlRemedial Feasibility Study Work Plan, dated 30 <br /> June 1999 prepared by AGE and approved by the PHS-EHD on 08 July 1999. <br />' <br /> 2.1. MONITORING WELL PURGE PROCEDURES <br />' On 25 June 1999, the water level in each monitoring well was measured relative to the tops of the <br />' well casings using a Solinst water level meter. The depths to ground water and relative ground water <br /> elevations are given in Table 1. <br /> After depth to water measurements, a two-stage submersible pump was used to purge each well. <br />' Eight gallons of water were removed from MW-1, MW-2 and MW-3 and fifteen gallons of water <br /> were removed from MW-4 (minimum of three saturated well casing-volumes per well). The ground <br />' water parameters of temperature,pH and conductivity were measured at regular intervals, using an <br /> ICM water analyzer. The ground water parameters stabilized during purging (Appendix A). Purged <br /> water was stored.on-site in 55-gallon Department of Transportation(DOT)-approved drums. <br /> 2.2. COLLECTION OF GROUND WATER SAMPLES <br />' A water sample was collected from each well, using a new disposable plastic bailer, and was <br /> . g p <br /> transferred into three 40-milliliter (ml) volatile organic analysis (VOA) vials containing 0.5ml'of <br />' Advanced GeoEnvironmental,Inc. - <br />