ARCHIVED REPORTS XR0006102 - Laserfiche WebLink

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i s PURPOSE AND SCOPE The following report documents the Fourth Quarter 2001 and First Quarter 2002 groundwater monitoring Depth to water measurements and groundwater sampling was coordinated with the adjacent property (Country Club Food and Fuel, 1856 Country Club Boulevard) On January 15, 2002, depth to water measurements and groundwater sampling were obtained from all wells associated with both sites Western Geo- Engineers (WEGE) sampled and monitored the webs associated with the Sanchez Property (1876 Country Club Blvd) and Advanced GeoEnvironmental, Inc (AGE) sampled and monitored the wells associated with Country Club Food and Fuel WEGE and AGE exchanged depth to water and well survey information SITE LOCATION AND DESCRIPTION The site address is 1876 Country Club Blvd , Stockton, CA It is located at the southeast corner of the intersection of Mission Street and Country Club Blvd (Figure 1) The property is located in projected Section 4, TIN, R6E of the MDB&M at approximately five feet above mean sea level On May 1, 2001 Land Surveyors Kjeldsen, Sinnock & Neudeck, Inc surveyed the positions, top of casing and surface elevations of all wells associated with this site, see Appendix B Figures 3 has been revised to this new survey along with Table 1 All associated figures showing site conditions are based on the new Figure 3 The property previously contained two 1000 gallon gasoline Underground Storage Tanks (UST's), product dispensers, and associated underground piping (Figure 3) The UST's, dispensers, and piping were removed from the site in 1989 The property owner originally installed five onsite monitoring wells Three additional cluster wells have been installed to aid in the investigation of soil and groundwater conditions at the site LOCAL GEOLOGY AND HYDROGEOLOGY The site is located on surface soils belonging to the Stockton Adobe Clay and Honeycut Clay series They are derived from Recent alluvial fan and floodplain deposits The 40 feet of explored section consisted of clay and silt overlying interbedded lenses of silty and clayey sands below 12 feet This first sandy formation will be designated the A zone aquifer The base of the A zone is at approximately 17 - 18 feet below ground surface (bgs) An aquitard consisting of silty clay approximately 3 to 4 feet thick separates the silty clayey sand A zone aquifer from the B zone aquifer that is found at approximately . 21 feet bgs and is approximately 6 to 7 feet thick The B zone aquifer consists of cleaner moderately sorted fine to coarse sand that shows graded bedding (fine to coarse with 3 QM 4h 2001&1 S` 2002