PR0535342 - Laserfiche WebLink

Home Browse Search

LFR Levine-Fricke 3.3 Production Well Installation One production well (PW-1) was installed on April 15, 2003 to provide water for dust control during remediation activities. Soil boring logs and well construction information for the monitoring well is included in Appendix A. The borehole for the well was advanced to a depth of approximately 216 feet bgs using a mud rotary drilling rig. After the borehole was advanced to the desired total depth, the well was constructed using 6-inch-diameter, schedule 80 PVC casing with 0.02- inch factory-cut slots. The screened interval of the well extends from 150 to 215 feet bgs with the remainder of the well constructed with 6-inch-diameter PVC blank casing. r installation, the well was developed by surging and bailing, and then sampled on April 14 2003, with a clean, unused, disposable bailer. A summary of the laboratory analytical results is provided in Table 2. Well development and sampling field data sheets are included in Appendix B. 3.4 Groundwater Monitoring Quarterly groundwater samples were collected from wells MW-1 through MW-5 on May 20, 2003. Prior to purging and sampling activities, depth-to-groundwater was measured using an electronic water-level meter. Groundwater elevations are summarized in Table 1., Groundwater elevation contours are shown on Figure 3. Each well was purged prior to sampling by removing at least 3 well casing volumes of water. The specific conductance, pH, dissolved oxygen, turbidity, and temperature of the removed water was measured and observed during well purging. The water-quality parameters and other pertinent information were recorded on field water sampling data sheets (Appendix B). Groundwater samples were collected after water parameters stabilized using a clean, unused, disposable bailer at each well. The water was poured into laboratory-supplied containers. Each container was capped, labeled with the well identification, time and date of sample collection, and analysis requested, and placed into an ice-chilled cooler for transport to the laboratory. Standard chain-of-custody protocol was followed during the sample handling process. Water generated during sampling activities was transferred into properly labeled 55- gallon drums. The water in the drums will be sampled and analyzed for appropriate disposal. 3.5 Chemical Analyses Collected groundwater samples were submitted to Severn Trent Laboratory, Inc. (STL) (a state-certified analytical laboratory) located in West Sacramento, California, on a Page 4 TTF QMR Q2-03-FINAL(7-2M3):JEE