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Robert Evans <br /> January 21, 1992 <br /> Page 2 <br /> Surface water results from the stream and the basin indicated low <br /> levels of Total Dissolved Solids and Electrical Conductance, and <br /> Settleable Solids were not detected in either sample. Turbidity <br /> was 454 mg/l in the detention basin and 122 mg/l in South Paddy <br /> Creek. <br /> GROG WATER MONITORING <br /> All four monitoring wells were sampled during the fourth quarter <br /> and tested for quarterly parameters. The results of the testing <br /> indicate that the groundwater is still of good quality. The <br /> results of the chemical analysis and chain of custody are attached. <br /> The sampling was performed by EMCON Associates of Sacramento. <br /> Hydraulic gradient and direction of groundwater flow have not <br /> changed appreciably from the third quarter monitoring event, as <br /> shown on the attached groundwater contour map. <br /> If you have any questions regarding this report, please contact me <br /> at (209) 468-3066. <br /> Sincerely, <br /> WES 2 WV7� <br /> SON <br /> Junior Engineer <br /> WJ:vj <br /> R: \VIRGINIA\LETTERS\4THQU'91.RE1 <br /> Enclosures <br /> c: Ed Padilla, Senior Registered Environmental <br /> Health Specialist <br /> LA 11204A <br />