Attachment 4 - North Central Lagoon O and M Manual.pdf

This document is an Operations and Maintenance Manual for the North Central Lagoon Wastewater Treatment Facility, located in the Allegheny National Forest in McKean County, Pennsylvania. The manual provides comprehensive details about the facility's operations, including its system components, which consist of a receiving pit, communitor, aeration lagoon, holding pond, chlorinator, and spray irrigation field. The facility was originally constructed in 1976 to treat sewage collected from vault toilets and holding tanks throughout the Allegheny National Forest recreation areas, with an average daily flow of 1,750 gallons and a peak daily flow of 2,544 gallons.

The manual outlines detailed procedures for normal operations, maintenance, seasonal startup and shutdown, sampling and testing, safety protocols, and emergency response. Key operational requirements include daily checks of pump stations and treatment components, bi-weekly effluent sampling, and adherence to NPDES discharge requirements, which mandate specific limits for Carbonaceous Biochemical Oxygen Demand (CBOD), Total Suspended Solids, Fecal Coliform Bacteria, and pH. The facility operates year-round, with spray irrigation permitted between April 15 and October 31, and acts as a large holding pond during winter months. The manual also includes extensive safety guidelines, emergency contact information, and protocols for handling potential natural and man-made disasters.