Laserfiche WebLink
n <br /> 7-Eleven/Stockton <br /> May 1990 <br /> o Developed and sampled the newly-installed monitoring- <br /> well cluster (MW-17) . <br /> MONITORING WELL INSTALLATION <br /> During this reporting period, one on-site monitoring-well <br /> cluster MW-17) consisting of three 2-inch-diameter wells of <br /> varying depths and screened intervals was installed. All work <br /> steps were conducted in accordance with the California Regional <br /> Water Quality Control Board (RWQCB) and San Joaquin County Local <br /> Health District (SJCLHD) regulations. <br /> On January 30 and 31, 1990, a three-well monitoring well <br /> cluster (MW-17, A, B, C) was installed in the location shown on <br /> the Site Plan (Figure 2) . The well-cluster location was selected <br /> "1 to further define the horizontal and vertical extent of dissolved <br /> hydrocarbons on site. Boreholes were drilled using a truck- <br /> mounted 8-1/4-inch-diameter, hollow-stem auger drill rig fol- <br /> lowing Groundwater Technology's Standard Operating Procedures <br /> (SOPS) (Appendix D) . Continuous cores were collected to obtain <br /> an accurate subsurface profile and to determine completion depths <br /> for each well of the cluster. <br /> The initial boring in the well cluster was drilled to a <br /> depth of 79-feet. Based on field observation of the continuous <br /> core, the total depth and screened intervals for each well in the <br /> well cluster was determined. The second boring was drilled to a <br /> depth of 73-feet and the third boring drilled to a depth of <br /> 63-feet. During drilling, continuous logs of lithologies <br /> encountered was prepared by an on-site geologist in accordance <br /> with the Unified Soil Classification System. The boring logs are <br /> included in Appendix F. <br /> ` 1A GROUNDWATER <br /> TECIiN01.01jY.INC. <br />