Central Marin Sanitation Agency

Below is a historical recap of major upgrade and improvement contracts completed since 2005.

PROJECT NAME
EFFLUENT STORAGE POND GRADING 

DESCRIPTION

Construction of a temporary access road to the effluent storage pond bottom, dust control, stripping of vegetated areas, scarifying of entire existing pond bottom, disposal of vegetative material at a legal disposal site, furnishing and testing of imported fill material, grading and compaction of imported fill material, removal of temporary access road and site restoration.

COST
$78,400
DURATION
2014
PROJECT NAME
COGENERATION COOLING SYSTEM IMPROVEMENTS

DESCRIPTION

Installation of new glycol make-up units, valves, piping and conduits, and connection to the replacement cogeneration system cooling expansion tank on the roof of the Solids Handling Building. CMSA supplied materials to contractor.

COST
$67,750
DURATION
2014
PROJECT NAME
INDUSTRIAL COATINGS – PRIMARY CLARIFIER NO. 2 

DESCRIPTION

Preparation and coating of steel surfaces, including carbon steel pipes, skimmer drive and idler axels, skimmer bearing housings, the inside and outside of water launder troughs with associated hangers, supports, and lateral braces, and other components inside Primary Clarifier No. 2.

COST
$47,400
DURATION
2013
PROJECT NAME
DIGESTER IMPROVEMENTS AND FATS, OILS, AND GREASE (FOG) / FOOD-TO-ENERGY (F2E) FACILITY (CONSTRUCTION)

DESCRIPTION

Replace each digester's floating steel cover with a membrane cover, replace the digester's gas mixing system with a more efficient pump mixing system, replace the biogas filtration equipment with a more effective system, and construct a new FOG/F2E receiving facility.

BOARD REPORT

COST
$5,787,000
DURATION
2006 - 2013 
PROJECT NAME
AERATION BLOWER REPLACEMENT PROJECT

DESCRIPTION

Demolition of two existing aeration blowers and appurtenances, installation of two new aeration blowers and appurtenances, and construction improvements to existing structural, mechanical, electrical, and control systems to support the new blowers.

BOARD REPORT

COST
$537,836
DURATION
2012
PROJECT NAME
AERATION TANK IMPROVEMENTS

DESCRIPTION

Remove and replace existing slide gates from one aeration basin; remove and replace Return Activated Sludge (RAS) piping and install PVC replacement pipe, stainless steel pipe supports. CMSA supplied materials to contractor.

COST
$35,552
DURATION
2012
PROJECT NAME
ADMINISTRATION BUILDING MODIFICATIONS

DESCRIPTION

Design elements for this project included remodeling and expanding the women’s locker room, enclosing the carport, building a shed to accommodate relocation of the bioassay lab and material storage rooms, and remodeling the vacated space to provide more office space for Environmental Services staff.

Other work included upgrading the building’s HVAC controls and equipment, fire alarm system, electrical and plumbing systems to support the remodeled areas, remodeling of the men's room for ADA compliance, and replacing the rest room fixtures throughout the plant in accordance with MMWD’s 2010 Water Use Audit Report.

COST
$1,217,705
DURATION
2008 - 2012
PROJECT NAME
OUTFALL IMPROVEMENTS

DESCRIPTION

This project included solids removal and sidecast disposal of interior solids from the marine outfall diffuser section.

COST
$1,309,419
DURATION
2008 - 2009
PROJECT NAME
EMERGENCY GENERATOR AND DECHLORINATION

DESCRIPTION

This project included installation of electrical, instrumentation, and mechanical systems to improve the reliability of the Agency’s emergency generator and dechlorination systems during a power outage.

Project elements included construction of a backup eductor-based sodium hypochlorite distribution system, installation of an emergency lighting system for the power generation facility, construction of a back-up cooling water system for the emergency generator, and installation of instrumentation to increase monitoring of the emergency generator’s operating conditions.

COST
$207,583
DURATION
2008 - 2010
PROJECT NAME
BARSCREEN AND WASHER COMPACTOR

DESCRIPTION

The barscreens are critical process equipment that remove plastic, wood, metal and other debris from the wastewater influent flow prior to it entering the grit tanks.

This project included replacement of the aging barscreens, replacement of the headworks roof access plates with skylights, installation of a washer/compactor for each barscreen, coating the headworks facility walls and ceiling with protective paint, and making necessary electrical, instrumentation, and mechanical system improvements to support the new equipment.

COST
$1,537,920
DURATION
2008 - 2010
PROJECT NAME
WET WEATHER IMPROVEMENT PROJECT

DESCRIPTION

The WWIP was upgraded to accommodate a 5-year design flow event by increasing the hydraulic and process capacity of the treatment plant to 125 MGD and expanding the storage capacity of the plant's effluent storage pond to 7 million gallons. Facilities construction included a retaining wall, a chemically-enhanced primary treatment facility, two new primary clarifiers, two new chlorine contact station tanks, and an effluent pump station. Also included was installation of new punch plate filter screens in the headworks and various process improvements.

COST
$48,627,796
DURATION
2006 - 2010
PROJECT NAME
EFFLUENT STORAGE POND DRAIN IMPROVEMENTS

DESCRIPTION

This project consisted of design and construction of drainage improvements for the Effluent Storage Pond which is used for storing flows during planned diversions and maintenance processes. Project elements included demolishing and disposing of existing pond liner, inlet and outlet structures and access ramp pavement improvements, excavation down to and modification of the inlet and outlet pipelines, restoration of the impermeable core at the pipeline excavations, grubbing and benching both sides of existing embankment, recompacting benches and building up new embankments, excavation and contouring of the pond bottom and installing new impermeable fabric liner, grading and compacting of the new crest road and access ramps, paving of exterior ramps, and landscape restoration.

COST
$1,623,116
DURATION
2006 - 2009
PROJECT NAME
POND DRAIN PUMP REPLACEMENT

DESCRIPTION

This project’s scope of work included replacement of the 6” pond drain pump with a larger 8” Fairbanks Morse pump to double the pumping rate, upsize the downstream piping and check valve from 8” to 10” to accommodate more flow, and modify the motor control center to power the larger pump and control the ramp-up and ramp-down time of the pump motor.

COST
$190,972
DURATION
2006 - 2008
PROJECT NAME
HEADWORKS: VACTOR STATION

DESCRIPTION

This project included demolition of the existing recreational vehicle and vactor truck receiving stations, construction of a combined recreational vehicle and septage receiving station, construction of a separate vactor truck receiving station, along with grading and paving for the new vactor station access road.

COST
$673,896
DURATION
2006 - 2007

PROJECT NAME
DEWATERING IMPROVEMENT PHASE 4: POLYMER STATION

DESCRIPTION

Project work included installing the pre-purchased Centrisys centrifuges, control panels, diverter gates and ancillary equipment in the solids handling building, and installing the piping, conduit, and other equipment needed to complete the improvements at the dewatering facility.

COST
$852,044
DURATION
2006 - 2007
CMSA