Caption title. At head of title: Project summary. Distributed to depository libraries in microfiche. "Jan. 1986." "EPA/600-S2-85-132."

Four methods were examined for rehabilitating defective sanitary sewers with respect to (1) logistic problems, (2) equipment and labor required by each, (3) the environmental impact as related to noise, air, and water pollution, (4) the social impacts, including public inconveniences from traffic disruption, utility relocation, and the temporary disruption of sanitary service, (5) economic parameters, including adjusted cost comparisons and the cost effectiveness of each alternative, (6) the effectiveness of the technique in reducing mainline infiltration, (7) durability of the products, and (8) before-and-after flow properties of the rehabilitated sections. The four methods studied were Insituform lining, test-and-seal, point repair, and conventional sliplining. The study emphasizes lnsituform lining, especially as installed in Hagerstown, Maryland, and it includes discussion of installation procedures and problems, product limitations, spatial requirements of the equipment, and safety hazards and procedures.