Novato Sanitary District Wastewater Treatment Facility Master Plan

Novato Sanitary District Wastewater Treatment Facility Master Plan

The Novato Sanitary District (District) proposes improvements to their wastewater treatment plant facilities. Historically, the District has successfully managed its wastewater treatment plants in a fiscally conservative manner, allowing the District to extract maximum use out of its treatment facilities while keeping its wastewater rates among the lowest in the Bay Area. As a result, all of the treatment facilities are at least 20 years old, with the majority of facilities being 30 to 50 years old. The facilities are at the end of their life cycle, as demonstrated by increasing operational and compliance issues at the District. Additionally, the District must prepare for anticipated significant changes in regulatory requirements, and for a small increase in influent flow due to potential conversion of existing septic tanks to sewered connections and infill development identified in the City of Novato General Plan. This results in a need for expanded and improved treatment capabilities and process reliability. The proposed improvements to the District facilities would increase current permitted capacity from 6.55 to 7.0 million gallons per day using the following preferred alternative. Novato Consolidated WWTP Alternative: Under this alternative, improvements would be made at the Novato WWTP to consolidate treatment processes at this facility. The Ignacio WWTP would be converted to a pumping facility with flows into the Ignacio facility pumped to the Novato WWTP via a new force main approximately 24 inches in diameter installed primarily along Rowland Boulevard (approximately 12,700 total linear feet). The Novato Consolidated WWTP Alternative would include the following Force Main Alignment Segments: Force Main Alignment Segment C: The route of Segment C generally extends northwesterly from the Ignacio WWTP, crossing under SR-37, to Hanna Ranch Road. The total length of Alignment Segment C is approximately 1,100 feet. Force Main Alignment Segment E: Segment E would extend from Hanna Ranch Road to a point just north of the terminus of Rowland Boulevard. Segment E generally proceeds west across the NWPRR track from Hanna Ranch Road and through an undeveloped area in a southwesterly direction, then it proceeds northeasterly along an undeveloped roadway. The alignment then enters Rowland Boulevard at its junction with Vintage Way, and proceeds northwesterly along Rowland Boulevard between the NWPRR right-of-way and the Vintage Oaks Shopping Center. The alignment then follows Rowland Way through the Rowland Plaza retail-commercial and the Golden Gate Business Park. The alignment crosses under Novato Creek along Rowland Way where it then turns east-northeast just south of the Sutter Health Community Hospital. The alignment then turns northwesterly along the eastern property line of the hospital and a disused portion of Franklin Avenue to intersect with the existing inflow conveyance line to the Novato WWTP. The total length of Alignment Segment E is about 8,250 feet.

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