Final Draft - Infiltration and Inflow Report June 1998

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• Lift Station Pump Testing. • Survey location of approximately 400 manholes for the Hydraulic Model. • Hydraulic Modeling of the collection system with HYDRA'. • Provide recommendations for rehabilitation of Infiltration/Inflow (I/I) source defects in the sanitary collection system in an effort to reduce overflows and bypasses into surrounding receiving waters. • Provide information for use in addressing Administrative Order pocket No. VI-97-1208 issued by the EPA on March 5, 1997. C. Location The City of Paris, which is the seat of Lamar County, is located in northeastern Texas at the intersection of Highway 82 (East-West) and Highway 271 (North- South), between the north and south forks of the Sulphur River. Longitude and latitude are 33.667 north and 95.548 west, respectively. D. Climate The climate in the Lamar County area can be characterized by relatively mild winters and hot summers. Tropical maritime air masses flow through the area in late spring, summer and early fall, and polar air masses frequent the area in winter. Rainfall is abundant and is distributed throughout the year. The mean annual precipitation is approximately 45.32 inches. E. Topography The elevation in Lamar County and it neighboring Delta County range from about 335 feet above sea level in the southeastern part of the area to about 620 feet on the highest watershed divides. In the City of Paris specifically, 80% of the terrain is nearly level to strongly sloping, while the remaining 20% is nearly level to gently sloping. The area is dissected by many well-defined drainage ways. The area to the ADS Environmental Services, Inc. II-2