Laserfiche WebLink
I <br />' i Quarterly Report - Second Quarter 2003 <br />' LANGSTON'S MARKET <br /> 15615 South 7" Street, Lathrop, California <br />' 1.0. INTRODUCTION <br />' At the request of Mr James Langston of Langston's Market, Advanced GeoEnvironmental, Inc <br /> (AGE)has prepared this quarterly report for the property located at 15615 South 7`h Street,Lathrop, <br /> California The scope of work included quarterly ground water monitoring and preparation of this <br />' report The location of the site and the immediately surrounding area are illustrated on Figure 1 <br /> Structures and monitoring well locations on the site are illustrated on Figure 2 Background <br /> information and details of previous investigation at the site are summarized in Appendix A <br /> 2.0. PROCEDURES <br />' On 18 June 2003, a quarterly ground water monitoring event was performed at the site Field work <br /> was performed in accordance with California Regional Water Quality Control Board-Central Valley <br />' Region (RWQCB) and San Joaquin County Environmental Health Department (EHD) guidelines <br /> for investigating underground storage tank(UST)sites and sampling ground water monitoring wells, <br /> respectively <br />' 2 1 WELL MONITORING AND PURGING <br /> A Solinst water level meter was used to measure the depth to ground water in eight ground water <br />' monitoring wells relative to the tops of the well casings The ground water elevations and gradient <br /> were determined from this data(Table 1) <br />' After recording water level measurements, a disposable bailer or a Waters inertial pump was used <br /> to purge each monitoring well of standing water(Appendix A) Monitoring well MW-1 was pumped <br /> dry after removing approximately 10 gallons of water Approximately 20 5gallons from well MW-2 <br />' and approximately 5 to 6 75 gallons were removed from the remaining wells Ground water <br /> temperature,pH and conductivity were measured at regular intervals during the purge process using <br /> an Oakton water analyzer Field data sheets are included in Appendix B Purged water was stored <br />' on-site in labeled, 55-gallon DOT-approved drums <br /> Following purging,the depth to ground water was measured to ensure that a minimum of 80%well- <br /> volume recharge had been achieved prior to sampling <br /> 1 <br />' Advanced GeoEnviranrnentai,Inc <br /> I <br />