Wastewater Infrastructure


RMC employs recognized industry experts for all aspects of wastewater planning and design projects—including master planning and modeling, infiltration/inflow analysis, condition assessment, O&M assessment, capital project planning and prioritization, pipeline design, trenchless construction technology, and asset management.

Montclair lift station

Montclair Lift Station Upgrades Design

Inland Empire Utilities Agency

Inland Empire Utilities Agency’s (IEUA) Montclair Lift Station, constructed in the mid-1970s, had experienced pump ragging problems and associated maintenance and operational difficulties. RMC investigated solutions to solve the ragging issues, evaluating grinders, screens, and several pump/impeller styles. We then designed the upgrades to replace pumps, electrical and controls, HVAC, piping, and valves. Work on the site also accommodated addition of a communications tower, and included re-grading and improved access for equipment.

Pier in San Clemente

Sewer Master Plan

City of San Clemente

RMC is updating San Clemente’s Sewer Master Plan, analyzing five specific areas of the City’s wastewater collection and treatment facilities. Services include evaluating capacity and identifying improvements needed for sewer lines to meet future flows. At the city’s wastewater treatment plant, RMC is identifying new technologies for processing biosolids and recommending improvement projects. We are also looking at treatment options that would allow urban runoff to be introduced directly in the city’s recycled water system and evaluating the potential for recycled water seasonal storage in conjunction with Santa Margarita Water District.

Trenchless pipe rehabilitation

Pipeline Rehabilitation

City of Santa Rosa

RMC provided technical peer review and construction assistance for the design of cured-in-place lining of sewers at seven locations throughout Santa Rosa. The sewers ranged in size from 6-inch to 18-inches in diameter. Locations included street alignments in residential neighborhoods, several creek crossings, a Highway 101 crossing, a commercial parking area, a residential easement area, and heavily forested area with limited access. Due to multiple locations, project challenges varied widely and included public notification, bypass pumping, site access, and traffic control.

Manhole along the San Leandro shoreline

Sanitary Sewer Capacity Study and Master Plan

City of San Leandro

The City of San Leandro operates a sanitary sewer collection system that includes over 120 miles of collection pipe in diameters from 4-inches to 42-inches and 13 lift stations. RMC was selected to prepare a Sanitary Sewer Capacity Study and Master Plan to address changes in development, planning, and existing conditions of the wastewater collection system since the last full capacity study in 1993. The city is also seeking to enhance its programs and decision making processes for maintenance, inspection, and rehabilitation of its collection system assets with the goal of developing programs that optimize the effective use of city resources.

Illustration of trenchless pipeline rehabilitation

Trenchless Rehabilitation On-Call Services

Napa Sanitation District

RMC is currently providing on-call trenchless technology training, design, and construction services for the Napa Sanitation District. Our team provides design training and design work on an as-needed basis and makes staff available to the district to answer technical questions regarding other consultant’s designs, and to help solve construction issues in the field. RMC is currently training the district staff on cured-in-place pipe (CIPP) design, as well as assisting the district with five different CIPP lining design projects.