Laserfiche WebLink
3.2.1 Soil Sampling <br /> Phase II drilling was conducted by RESNA Industries (C57 622930) utilizing a hollow stem auger dnlI <br /> ng A field geologist continuously logged all drill cuttings and cored soil samples utilizing the Unified <br /> P g <br /> Soil Classification System Descriptions of soil types encountered and sample collection intervals are <br /> included on the well log (Appendix I) Cored soil samples were collected at five foot intervals using <br /> a 2-inch diameter split-spoon sampler containing three brass tubes The cored samples and dnll <br /> cuttings were characterized for soil type, moisture content, and evidence of petroleum contamination <br /> A PID was used as a screening device for the detection of petroleum hydrocarbon vapors in drill <br /> cuttings and cored samples The soil sample collected at the water table interface (capillary zone) and <br /> three others with high PID readings were submitted for laboratory analysis <br /> 3.2.2 Monitoring Well Construction <br /> Soil boring MWI was completed as a groundwater monitoring well to assess the extent of groundwater <br /> ' contamination beneath the site The Iocation of this monitoring well is shown on Figure 4 <br /> The well was constructed of 2-inch diameter F480 PVC well screen/casing and completed as shown <br /> on the well log (Appendix I) A well screen slot size of 0 010 inch and a Lone Star 2/12 sand filter <br /> ' pack was used Neat cement was used to seal the well in accordance with San Joaquin County and <br /> California Department of Water Resources guidelines A locking, water tight well box was concreted <br /> ' in place at ground surface <br /> 3.2.3 Groundwater Sampling <br /> On March 4, 1992, the well was monitored and developed in accordance with RESNA's QAIQC <br /> Protocol (Appendix II) The field purge log is included in Appendix III A water sample was then <br /> collected from the well, placed on chemical ice, and transported under chain-of-custody protocol to <br /> RESNA Environmental Laboratories The sample was analyzed for BTEX and TPHG utilizing EPA <br /> methods 8020 and 8015, respectively <br /> R 042992 TJL 5 <br />