ARCHIVED REPORTS XR0000936 - Laserfiche WebLink

Home Browse Search

Quarterly Report - Fourth Quarter 2002 STRONG PROPERTY , 5157 Wesi B , usmess Loop 245, Tracy, Calyfornia •. .. 1.0. INTRODUCTION At the request of Messrs. Robert and Mike Strong,Advanced GeoEnvironmental Inc. (AGE) has . prepared this,quarterly report for the property located at 5,157 West Business Loop 205, Tracy, California. The scope of work included installation, development and survey of four ground water ' monitoring wells(MW7 through MW 10),ground water sampling ofmonitoring wells MW 1 through MW10 and preparation of this report. . The site and the surrounding area are illustrated in Figure 1. Structures and monitoring well locations are illustrated on Figures 2 and 3. Background information for the site is summarized in the AGE-prepared document titled Additional Site Assessment Work Plan Addendum, dated 01 July 1999. Quarterly monitoring data from ' July 1998 to the present.is summarized in Tables 1 and 2 of this report. 2.0. PROCEDURES , • Four ground water monitoring wells(MW7 through MW 10)were installed in October 2002,and ten monitoring wells were purged and sampled on.12 December 2002. All field workp rocedures and " reporting requirements are in accordance with guidelines issued by.the Central Valley Regional Water Quality Control Board (CVRWQCB) for subsurface investigations of underground storage tank(UST) sites and guidelines issued by San Joaquin County Environmental Health Departrnent (EHD) for sampling of ground water monitoring wells. 2.1. DRILLING AND SAMPLING In'October 2002,pilot'borings MW7 through MW:10 were advanced at the site using aCME-75HT drill rig,equipped with 8.25-inch diameter hollow-stem augers. The drill rig and two-man crew were supplied by Mitchell Drilling Environmental.Auger returns generated by drilling were stored on-site in labeled, 55-gallon Department of Transportation (DOT)-approved'drums r Soil samples were collected ahead of the drill bit using a California modifiedsplit- oon sampler loade&with:thrde pre-cleaned 2-inch by'6-inch brass sleeves. The samples were collected from monitoring well pilot borings MW7 through MW 10 at five-foot intervals, beginning-at,5 feet bsg I using a I40-pound hammer to advance the sampler.•The number of blows required to advance the sampler over each 6-inch increment of the 18-inch sampling interval was recorded on the boring ' logs. 1 Ad.ced GwEnvkmi Intal,Inc.