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PURPOSE AND SCOPE <br /> The following report documents the Third Quarter 200I groundwater motutornng Depth <br /> to water measurements and groundwater samples were obtained from the five monitoring <br /> wells (MWi, MW2, MW3, MW4 and MW5) and the newly installed groundwater <br /> recovery cluster well (Rl A & B) located at 1876 Country Club Blvd and the two newly <br /> installed cluster monitoring wells (MW6 A & B, MW7 A & B) located in the western <br /> curb area of Mission Road, 1904 Country Club Blvd , Stockton, CA <br /> SITE LOCATION AND DESCRIPTION <br /> The site address is 1876 Country Club Blvd , Stockton, CA It is located at the southeast <br /> corner of the intersection of Mission Street and Country Club Blvd (Figure 1) The <br /> property is located in projected Section 4, TIN, R6E of the MDB&M at approximately <br /> five feet above mean sea level On May 1, 2001 Land Surveyors Kjeldsen, Smnock & <br /> Neudeck, Inc surveyed the positions, top of casing and surface elevations of all wells <br /> associated with this site, see Appendix B Figures 3 has been revised to this new survey <br /> along with Table 1 All associated figures showing site conditions are based on the new <br /> Figure 3. <br /> • The property previously contained two 1000 gallon gasoline Underground Storage Tanks <br /> (UST's), product dispensers, and associated underground piping (Figure 3) The UST's, <br /> dispensers, and piping were removed from the site in 1989 <br /> The property owner originally installed five onsite monitoring wells With this report <br /> three additional cluster wells have been installed to and in the investigation of soil and <br /> groundwater conditions at the site <br /> LOCAL GEOLOGY AND HYDROGEOLOGY <br /> The site is located on surface soils belonging to the Stockton Adobe Clay and Honeycut <br /> Clay series They are derived from Recent alluvial fan and floodplain deposits The 40 <br /> feet of explored section consisted of clay and silt overlying interbedded lenses of silty <br /> and clayey sands below 12 feet This first sandy formation will be designated the A zone <br /> aquifer The base of the A zone is at approximately 17 - 18 feet below ground surface <br /> (bgs) An aquitard consisting of silty clay approximately 3 to 4 feet thick separates the <br /> silty clayey sand A zone aquifer from the B zone aquifer that is found at approximately <br /> 21 feet bgs and is approximately 6 to 7 feet thick The B zone aquifer consists of cleaner <br /> moderately sorted fine to coarse sand that shows graded bedding (fine to coarse with <br /> depth) Beneath the B zone aquifer is stiff clay that extends from approximately 27 feet <br /> bgs to 40 feet bgs The original five monitor wells did not encounter groundwater in the <br /> A zone aquifer when initially drilled and sampled Depth to water measurements taken <br /> 3 Sanchez 3rd QM 2001 <br />