Laserfiche WebLink
,tea <br /> rte, Quarterly Report - Second Quarter 2002 <br /> ENTERPRISE INVESTMENTS (Former J.B. Murphy Trucking) <br /> 355 Enterprise Place, Tracy, California <br /> s <br /> I .3 <br /> 1.0. INTRODUCTION <br /> `u At the request of Mr. Monty Warren of Enterprise Investments,Advanced GeoEnvironmental,Inc. <br /> (AGE) has prepared this quarterly report for the property located at 355 Enterprise Place, Tracy, <br /> California.The site and the surrounding area are illustrated on Figure 1 Structures,boring and well <br /> 'r locations are illustrated on Figure 2. Background information is summarized in the AGE-prepared <br /> Monitoring Well Installation Work Plan -November 2000, dated 27 November 2000. <br /> 2.0. PROCEDURES <br /> Five ground water monitoring wells (MW1 through MW5) and one ground water extraction well <br /> (EW1) were monitored and sampled in May 2002. Field work was performed in accordance with <br /> [7;j guidelines issued b the Central ValleyRegional Water Quality Control Board CVRW CB for the <br /> investigation of underground storage tanks (UST) sites. <br /> 2.1. WELL MONITORING AND EVACUATION <br /> Ground water sampling of wells MW 1 through MW5 and EW 1 was conducted on 13 May 2002.For <br /> the sampling event,a Solinst water level meter was used to measure the depth to ground water in the <br /> wells relative to the tops of the well casings. The ground water elevations and gradient were <br /> determined from these data(Table 1). <br /> After recording water level measurements,disposable plastic bailers were used to purge wells <br /> MWl through MW5 and EW1 of standing water. Approximately 5.5 gallons of water(a minimum <br /> of 3 casing water-volumes per well) were removed from MW1, MW3, MW4 and MW5; <br /> a approximately 12.5 gallons of water were removed from MW2; and approximately 55 gallons of <br /> water were removed from EWl Ground water temperature,pH and conductivity were measured at <br /> regular intervals during purging using an Oakton water analyzer. Purged ground water was <br /> containerized inproperly labeled DOT-approved model 17H 55-gallon drams and was stored on-site. <br /> ,1 Field sheets and data are included in Appendix A. <br /> 2.2. COLLECTION OF GROUND WATER SAMPLES <br /> Water samples were collected from the purged wells using new disposable plastic bailers after <br /> -' - allowing the wells to achieve a minimum 80%recovery of the pre-purge water volume. Each water <br /> sample was transferred into three 40-m1 VOA vials containing 0.5 ml 18%hydrochloric acid as a <br /> Advanced GeoEnvironmental,Inc. <br /> I <br /> _J <br />