Laserfiche WebLink
P.O. Box 576981 <br /> M.J. Kloberdanz & Associates Modesto California 95357-6981 <br /> Environmental Services Phone: (209) 577-8186 <br /> Fax: (209) 577-8158 <br /> Pombo Ranch Property, <br /> 24100 S. Lammers Road, Tracy, CaliforniMCMVED <br /> Quarterly Groundwater Sampling Report AUG 2 9 2003 <br /> July 2003 <br /> ENPERMIT/SERVICES <br /> ENT N <br /> NARRATIVE <br /> On July 18, 2003 M.J. Kloberdanz & Associates, in conjunction with GeoAnalytical <br /> Laboratories, Inc., conducted quarterly groundwater monitoring of the Pombo Ranch site <br /> at 24100 S. Lammers Road in Tracy, California. Quarterly monitoring activities <br /> consisted of depth to water and water characterization measurements, well purging, <br /> groundwater sample collection and laboratory analysis of water samples collected from <br /> the three groundwater-monitoring wells at this site. <br /> • Depths to groundwater measurements were obtained and the wells monitored for floating <br /> product before purging of the wells. Each well was evacuated of at least three well <br /> volumes by means of a steam-cleaned, stainless steel bladder-type pump. During the <br /> purging of the wells, field pH, electrical conductivity, and temperature measurements <br /> were monitored to verify well stability and to insure that representative groundwater <br /> samples were collected. Once well stability was achieved, groundwater samples were <br /> 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 and then 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 /> Shallow groundwater was measured at depths of 11.12 to 11.65 feet below grade during <br /> the July 18, 2003 groundwater monitoring event. Water levels were approximately 1.8 <br /> feet higher than levels recorded in the April 25, 2003 event. Shallow groundwater flow <br />