ARCHIVED REPORTS_XR0007068 - Laserfiche WebLink

Home Browse Search

' Quarterly Report - Second Quarter 2005 • COMFORT AIR, INC. 1607 Turnpike Road, Stockton, California ' 1.0. INTRODUCTION At the request of Mr Greg Gaut, Advanced GeoEnvironmental, Inc (AGE) has prepared this ' quarterly report of environmental activities conducted at Comfort Air, Inc , 1607 Turnpike Road, Stockton, California (site) The scope of work included performance of a quarterly ground water monitoring event and preparation of this report The objective of the work was to charactenze ground ' water flow direction and gradient on the site and monitor dissolved petroleum hydrocarbon and fuel additive concentrations from monitoring well samples The location of the site is illustrated in Figure 1 A plan of the site is illustrated in Figure 2 ' This report i r p s prepared in accordance with guidelines issued by the Central Valley Regional Water ' Quality Control Board(CVRWQCB)for investigation of underground storage tank (UST) sites A summary of previous environmental assessment activities are included in Appendix A Historical ground water monitoring results are summarized on Tables 1 and 2 2.0. PROCEDURES ' . Field activities were performed in accordance with guidelines for investigation of underground storage tank(UST)sites and sampling groundwater monitoring wells issued by the CVRWQCB and ' by the San Joaquin County Environmental Health Department (EHD), respectively ' 21 QUARTERLY WELL MONITORING On 05 May 2005,a ground water monitoring event was conducted at the site A total of sixteen wells were monitored and sampled I2 1 1 Well Monitoring and Evacuation A Solinst water level meter was used to measure the depth to ground water in wells MW-3, MW-5, MW-6, MW-7, MW-8A/B through MW-12A/B, MW-13 and EX-1 relative to the tops of the well casings(Table 1) After the depth-to-ground-water measurements,a minimum of three casing-water volumes of water were purged from each well using Watera Hydro-Lift II pump for wells MW-3, MW-5, MW-7 and MW-8A through MW-13 Approximately 5 5 to 15 gallons of water were removed from shallow-screened wells MW-3, MW-5, MW-7 and MW-8A through MW-12A, approximately 2 i to 30 gallons of water were removed from deep-screened wells MW-813,MW-I 1 B, MW-12B and EX-1 and 48 gallons of water were removed from well MW-13 Wells MW-6,MW- 9B and MW-10B were purged dry prior to the removal of three casing volumes, the wells were IAdvanced GeoEnvironmental,Inc