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APRIL-JUNE 1998 QUARTERLY GROUNDWATER MONITORING REPORT FOR SANCHEZ PROPERTY, 1876 COUNTRY CLUB BL VD., STOCKTON, CA SEPTEMBER 10, 1998 PURPOSE AND SCOPE The following report documents the Second Quarter 1998 collection and certified laboratory analysis of groundwater samples from five monitoring wells located at 1876 Country Club Blvd Stockton, CA SITE LOCATION ANIS DESCRIPTION The site address is 1876 Country Club Blvd , Stockton, CA It is located at the southeast coiner of the intersection of Mission Stieet and Countty Club Blvd (Figure 1) The property is located in piolected Section 4, TIN, R6E of the MDB&M at approximately five feet above mean sea level The property previously contained two 1000 gallon gasoline Underground Storage Tanks (UST's), product dispensers, and associated underground piping (Figure 3) The UST's, dispenseis, and piping were removed from the site in 1989 The property owner has installed five monitoring wells in the course of investigating the soil and broundwater conditions at the site .LOCAL GEOLOGY ANIS HYDROGE®LOGY 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 26 feet of explored section consisted of clay and silt overlying interbedded lenses of silty and clayey sands below 20 feet The groundwater in the vicinity of the site is unconfined Groundwater elevation at the site varies fionn a wet year high of 7 feet bgs to about 35-40 feet bgs during the previous drought period Gioundwatei flow direction at the site has genei ally been to the northeast QUARTERLY GROUNDWATER MONITORING JUNE 2 1998 WEGE and Lawrence Tank Testing (LTT) personnel collected quarterly groundwater samples frons the five monitor wells at the site on June 2, 1998 See Appendix A for QA/QC, details, methods, procedures, abbreviations, and acronyms used in sampling and analysis 1 Sanchez QM 6-98