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r <br /> P.O. Box 576981 <br /> MA Kloberdanz &_ Associates Modesto, California 95357-6981 <br /> Environmental Assessment Phone: (209) 577-8186 <br /> . Fax: (209) 577-8158 <br /> RIPONA MARKET <br /> 223 W. Washington Street, Pipon, California�� <br /> r--r-F3 2 8 7005 <br /> First Quarter Groundwater Sampling Report <br /> February 2005 E�tiV1P�0N�4IENT HEALTHY PEW,,ITISERVICES <br /> NARRATIVE <br /> On February 3, 2005 M J Kloberdanz & Associates, in conjunction with GeoAnalytical <br /> Laboratories, Inc , conducted quarterly groundwater monitoring of the Ripona Market site <br /> at 223 W Washington Street, Ripon, California Quarterly monitoring activities <br /> consisted of depth to water measurement, well purging and water characterization, <br /> groundwater sample collection and laboratory analysis on four groundwater-monitoring <br /> wells located at this site <br /> r <br /> The four groundwater-monitoring wells were monitored for floating product and depth to <br /> groundwater measurements obtained before purging the wells Each well was evacuated <br /> of at least three well volumes by means of a steam-cleaned, stainless steel bladder-type <br /> pump During the purging of the wells, field pH, electrical conductivity, and temperature <br /> measurements were monitored to verify well stability and to insure that representative <br /> groundwater samples were collected Once well stability was achieved, groundwater <br /> samples were collected Field data sheets are presented in appendix B <br /> The groundwater samples were labeled and placed in an ice chest cooled with blue ice or <br /> crushed ice, logged on a Chain of Custody form, and delivered to GeoAnalytical <br /> Laboratories, Inc , a state certified laboratory, located in Modesto, California The water <br /> samples were analyzed for BTEX, MTBE and the Oxygenated Compounds including <br /> EDB and 1, 2 DCA (EPA Method 8260B) and gasoline range petroleum hydrocarbons <br /> (EPA Method 5030, GCFID) All of the water samples were checked in the laboratory <br /> for dissolved oxygen concentrations by Method SM4500-0 G <br /> SUMMARY FINDINGS <br /> Groundwater was present as an unconfined state at depths of approximately 27 2 to 27 7 <br /> feet below ground surface at the Ripona Market site on February 3, 2005 The unconfined <br /> water table was present approximately 1 7 feet higher than in the November 1, 2004 <br /> monitoring event A hydrograph of the groundwater elevations at the Ripona Market site <br /> is presented in Figure 6 <br />