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I I ( 3) Costs. Capital costs of the collection subolan and treatment subplan are presented below. The" trunk- line additions will serve the expected population growth through the year 1983. The interim plant improvements will serve through 1982, and the ex- panded plant should treat the projected year 2000 flows. Collection System Rehabilitation Trunkline Additions Interim Treatment Plant Expansion $ 996,000 2,780,000 127,000 813,300 $4,716,300 Total Cost (4) Impacts. No major adverse social or environmental impacts are anticipated due to the plans proposed for San Marcos. The effects of construction are outweighed by the benefits of better wastewater treatment and collection. (5) Water Rights. The City of San Marcos obtains its water from wells and sells water to others, in- cluding Camp Gary. Estimated water use in 1977 was 5.768 MGD, while sewage flows averaged 3.224 MGD. Under the proposed plan, 3.07 MGD of waste- water will be discharged to the San Marcos River in the year 1983. e. Segment~810 (1) City of Kyle. (a) Structural Requirements. No changes or addi- tions are required at the Kyle wastewater treat- ment plant in this subplan. A change is needed, however, in the current permit requirement for TSS. Studies by the Texas Department of Water Resources have revealed that due to the growth of algae in the ponds, higher TSS limits are reasonable for plants usir.g stabilization ponds. (b) Management Requirements. The City of Kyle has been chosen as the management agency to con- tinue to own and operate the sewerage system. The City possesses all the necessary powers for meeting the requirements of section 208 (c) (2) of P.L. 92-500 for a local management agency. (c) Costs. No capital expenditures are required for treatment facilities in Kyle, if a permit revi- sion for a higher effluent TSS value is approved by the Texas Department of Water Resources. II-C-IO