ARCHIVED REPORTS_XR0005069 - Laserfiche WebLink

Home Browse Search

Quarterly Report'.- First Quarter 2001 . BOB'S MUFFLER SHOP 466 Moffat Boulevard,Manteca, California ' 1.0. INTRODUCTION In accordance with the request of Mr. Tom Barbour of Bob's Muffler Shop, Advanced GeoEnvironmental, Inc. (AGE) has prepared this quarterly report for the property located at 466 ' Moffat Boulevard, Manteca, California. The scope of work included quarterly ground water monitoring and preparation of this report.The location of the site and the immediately surrounding ' area-are illustrated on Figure 1; structures,former UST locations and monitoring well locations are illustrated on Figure 2. Background information is summarized in the Preliminary Site Assessment WorkPlan dated 30 November 1998 and Preliminary Investigation and Evaluation Report dated 10 August 1999, both prepared by AGE. 2.0. PROCEDURES Quarterly ground water monitoring was performed on monitoring wells MW-1 through MW-5 on ' 16 March 2001. The work was performed in accordance with PHS-EHD and California Regional Water Quality Control Board -. Central Valley Region guidelines for sampling ground water monitoring wells and investigating underground storage tank (UST) sites.' 2.1., MONITORING WELL PURGE PROCEDURES. On 16 March2001, a Solinst water level meter was used to measure the depth to ground water in the five wells relative to.the tops of the well casings. Ground water elevations, flow.direction.and 1 gradient were determined from this data(Table 1). After recording water level measurements, a two-stage submersible pump was used to purge each ' monitoring well of standing water. Approximately 9 gallons of water were removed from each well (approximately 3 well casing water volumes).Ground water temperature,pH and conductivity were, measured at 1-gallon intervals during the purge process using a Oakton water analyzer..Field data ' sheets are included in Appendix A. Purged water was stored on site in labeled, 55-gallon DOT-approved drums. 2.2. COLLECTION OF GROUND WATER SAMPLES were collected from each purged well with disposable bailers.Each water sample was Water samples p g transferred into laboratory-supplied 40-ml VOA vials containing 0.5 ml 18%hydrochloric acid as ' a sample.preservative. After collection, the samples were properly labeled, placed in a chilled Advanced GeoEnvironmental,Inc.