Laserfiche WebLink
Quarterly Report - November 1999 <br /> LARRY'S AUTO REPAIR <br /> 308 North Grant Street, Stockton, California <br /> 1 0 INTRODUCTION AND SCOPE OF WORK , <br /> At the request of Mr Charles Skobrak,Advanced GeoEnvironmental, Inc (AGE) has prepared this <br /> report summanzing ground water monitoring activities performed at 308 North Grant Street, <br /> Stockton, California Quarterly ground water monitoring was conducted on 22 November 1999 The <br /> I location of the site is illustrated in Figure 1 - Location Map Structures and well locations are <br /> illustrated on Figure 2 - Site Plan Background information was sumrnarzed in Quartet ly Report - <br /> August 1997 prepared by AGE <br /> I <br /> 20 PROCEDURES <br /> Field work was performed in accordance with San Joaquin County Public Health Services - <br /> Environmental Health Division (PHS-EHD) and Regional Water Quality Control Board - Central <br /> Valley Region (RWQCB-CVR) guidelines for the investigation of underground storage tank (UST) <br /> sites <br /> 2 1 MONITORING WELL PURGE PROCEDURES <br /> On 22 November 1999, a Solinst water meter was used to measure the depth to ground water in five <br /> monitoring wells and five vapor wells at the site relative to the tops of the well casings An Ullage <br /> interface probe was also used to check for the presence of free product in wells MW-2, MW-4, VW- <br /> 2B, VW-3, VW-4, VW-5B and VW-5C The ground water elevations, ground water flow direction <br /> and hydraulic gradient were detennined from these data (Table 1) <br /> After measuring ground water depths, monitoring wells MW-1, MW-2, MW-3, MW-4 and MW-7 <br /> were purged using a 2-stage submersible purge pump Vapor wells VW-2B, VW-3, VW-4, VW-5B <br /> and VW-5C were purged using PVC bailers The puige pwnp and bailees were decontaminated pnoi <br /> to purging each well using an Alconox solution and clean rinse water Approximately 6 to 21 gallons <br /> of water (minimum of 3 well -,olumes) were removed from each purged well Water was purged <br /> from near the top of the water surface to assure removal of stagnate water trapped within the non- <br /> screened section of the drown wells Temperature, pH and conductivity were measured at regular <br /> intervals during purging The measured properties of the purged water and the field sheets are <br /> included in Appendix A The purged water was stored on-site in 55-gallon DOT drums pending <br /> laboratory analyses <br /> Adianccd GioEmironnuntal ine <br /> I <br />