ARCHIVED REPORTS_XR0008924 - Laserfiche WebLink

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I California Products Company nia Ceda o p y Additional Soil and Groundwater Investigation And Well Survey 1340 West Washington Street, Stockton, CA within a 2000' radius of the site The DWR located well drillers' reports for forty-eight wells in the general area A copy of the well drillers' reports is included in Appendix B r California Water Service notified RAB Consulting on September 22, 2003 that they reported no ` wells within a 2000' radius of the site Surface-water Bodies and Environmental Habitats The topography surrounding the subject site is generally flat to gently sloping westward In the site vicinity, the neighborhood is described as industrial, however, residential areas are south and west of the site within the survey area The nearest surface sensitive receptor appears to be north of the site is the Mormon Slough, located over a 1000 feet north of the former UST location, which in turn connects with the Port of Stockton/San Joaquin River approximately 0 5 males north of the site No other creeks or surface drainages were observed within the search area The area north of the site belongs to McCormack & Baxter and is currently under it's own environmental investigations 1 SUMMARY AND CONCLUSIONS Well Survey Conclusions • The results of the well survey appear to indicate that shallow wells in the area are monitoring wells only, properties with in the area served by the municipal water supply We did not discover venfiable domestic or municipal wells during our survey I The closest deeper water wells in the vicinity to the north belong to CH2M Hill/McCormick & p Y g Baxter and a Paper Company to the south of the subject property These wells are screened at much deeper zones and are operated under site-specific monitoring programs Soil and Groundwater Investigation The site investigations performed on September 12, 2002, and July 21, 2003, at the California Cedar Products Stockton facility have provided additional characterization of the soils beneath the site in the vicinity of the former USTs Analysis of soil samples collected from the vadose zone in the July 21, 2003 investigation indicate that soils impacted by diesel are localized in the area of the former UST excavation area E The clay aquitard originally identified in 2002, was confirmed to underlay the entire area explored The clay aquitard was encountered in all of the probes at depths as follows HP-1 @ 24ft, HP-2 @ 25ft, HP-3 @ 25 5ft, HP-4@24 5ft and HP-5 @ 25 5ft In the deeper probe (HP- 1) the clay aquitard was approximately nine feet in thickness When the depth to the top of the clay aquitard is plotted on the boring location map, the top of the clay defines a surface dipping gently to the southeast This is also the direction of the assumed gradient of the upper water- bearing zone Robert A Booher Consulting 5 November 6, 2003