Laserfiche WebLink
Mr Jeffrey Wong <br /> March 24, 2006 <br /> • Page 2 ' <br /> Number of Detections Minimum Maximum <br /> Constituents above the am le the 7 Concentration in 1L Well Ill Concentration in <br /> Total Samples N9 ( ) NgIL(well ID) <br /> TPHg 0 <50 <50 <br /> Benzene 0 <0 5 <0 5 <br /> MTBE 6 1 0(MW-4 MW-7) 150(MW-1) <br /> Definitions <br /> ID =Identification <br /> TPI-19=Total petroleum hydrocarbons as gasoline <br /> LRL = Laboratory reporting limit <br /> uglL = Micrograms per liter <br /> MTBE = Methyl tertiary butyl ether <br /> ND = Constituent reported below the laboratory reporting limits <br /> A groundwater elevation versus time composite hydrograph is presented in Attachment B as Figure 3 <br /> Groundwater elevations decreased approximately 15 feet from December 2000 to October 2002 <br /> Concentration and groundwater elevation versus time hydrographs are presented for monitoring wells <br /> • MW-1 through MW-7 (Attachment B, Figures 4 through 10) Included on the plots are bar diagrams <br /> representing monitoring well screened Intervals Concentrations reported below laboratory reporting <br /> limits are plotted at one half reporting limits per US Environmental Protection Agency (EPA) protocols <br /> Groundwater samples collected between 2Q1999 to 2Q2004 reported MTBE below laboratory reporting <br /> limits In MW-3 <br /> Please forward questions or concerns regarding these activities to Bob Jackson at (805) 546-0455 ext 41 <br /> Sincerely, <br /> SECOR International Incorporated <br /> Bob W Jac on Jr <br /> Project Manager <br /> Enclosures <br /> Attachment A March 1, 2006, Groundwater Monitoring & Sampling Report by Gettler-Ryan, <br /> Incorporated <br /> Attachment B Hydrocarbon Concentration and Groundwater Elevations versus Time Hydrographs <br /> Attachment C Groundwater Flow Directions and Gradients — Rose Diagram <br /> cc Mr Dana Thurman, ChevronTexaco Environmental Management Company 6001 Bollinger Canyon Road, <br /> San Ramon, CA 94583 <br /> . Mr Jim Barton, Regional Water Quality Control Board—Central Valley Region, 11020 Sun Center Drive <br /> #200, Rancho Cordova, CA 95670 <br /> Mr Joseph Budiselich,4514 Waterloo Road, Stockton, CA 95215 <br /> 1Q06MR 99840 SECOR International Incorporated <br />