VIDEO. From the Sewer Authority Mid-Coastside (SAM) Directors meeting on Monday, November 8th, 2021 at 7:00pm by Zoom.
The purpose of this report is for the Board of Directors to discuss and authorize the General Manager to issue a Purchase Order to Vapex Environmental Technologies for supply of odor control unit for Pump stations.
The cost is $149,940 (taxes excluded) for two units and $86,700 for one unit. Included in the FY 20-21 budget. is $125,000.
Strategic Plan Compliance
The recommendation complies with the SAM Strategic Plan’s Vision: “Utilize state of the art technologies and management practices to advance public health and environmental protection.” It also complies with the Strategic Plan’s Goal 5: Infrastructure, Operations and Maintenance: “The goals are no spills, safety, environmental protection, reliability, and long-term cost effectiveness.”
Background and Discussion/Report
Over approximately the past twenty years SAM has injected Sodium Hypochlorite (high concentration liquid bleach) into the wet well at both the Montara and Princeton Pump Stations to control corrosion and odors at the Portola Pump Station. The Portola Pump Station is equipped with an odor control biofilter which is not very effective. There has been constant complaints from people in the neighborhood of the Portola Pump Station of the odors.
Staff considered various options including changing to feed Calcium Nitrate and control the dose rate. This option was not very cost effective and required use of tanks and chemicals which is not a very favorable environmentally friendly solution.
Staff checked out the Vapex Odor Control unit and carried out pilot trials at the Portola Pump station for a period of almost 2 months from 7/19/21 to 9/8/21. The results were encouraging and there were no complaints of odor during that period. Also, staff carried out pilot trials at Princeton Pump Station for a period of almost 1 month from 9/13/21 to 10/21/21. Princeton PS has a history of collection of Fats, Oils and Greases (FOG) and this unit proved to be very effective in breaking down the FOG and has showed good results. No bleach will be required to be injected at the Princeton Pump Station if this unit is installed at Princeton PS.
The Vapex Odor Control Technology is a vapor phase treatment that treats odors, remediates surface fats, oils, and grease, and mitigates microbial induced corrosion. A three fluid nozzle produces less than 5-micron sized water particles. The water particles combine with Ozone, a strong oxidant, to produce a powerful oxidant known as hydroxyl radical.
The unit treats odors in the space where the odors are generated. It only requires air, electricity, and water to generate the oxidants. There is no need to add any chemicals.
The average annual maintenance costs are approximately $3,000.
Staff has received a proposal from Vapex for the following:
1. Odor Control Unit for Portola PS- $86,700
2. Odor Control Unit for Princeton PS- $85,680
3. Odor Control Unit for both Portola and Princeton PS- $149,940 (saving of approximately $22,440 if we do a combined purchase now)
The Board has the following options:
Option1- Authorize to purchase one unit for Portola for $86,700
Option2- Authorize to purchase two units for $149,940
Staff Recommendation Staff recommends the Board authorize General Manager to issue a Purchase order to Vapex Environmental Technologies for supply of Odor Control unit for Portola PS and Princeton PS in an amount not to exceed $149,940 (taxes excluded).
Full Staff ReportPaperlessPacket211108 (1)
SAM TOUR of PORTOLA PUMP STATION.
Many have complained, over the years, about a vague sewer smell at the SAM Portola Pump Station. SAM has just installed a Vapex Unit. This is what it will do:
Vapex Environmental Technologies “Odor Control System” uses air atomizing nozzles (designed by NASA) to combine water, oxygen and ozone to create Hydroxyl Radicals anti-oxidants which attacks odorous compounds, such as Hydrogen Sulphide.
Did you know there are approximately 5,000 different species of the sea sponge? Each sea sponge feeds off bacteria, carbon, nitrogen, and other toxic elements in the ocean. They protect the ocean from harmful elements within the water. Like the sea sponge, Vapex “radically” removes odors in the air that emanates from wastewater. Some sea sponges are more like Vapex than others as they like to attach themselves to debris in the water. Vapex’s hydroxyl radicals attaches itself to the odorous compounds and oxidizes them eliminating odor almost immediately. Most sea sponges also feed off organic debris within the water. Vapex’s mist can also “feed” off organic debris that collect above the wastewater like Fats, Oils & Grease (FOG). This helps to control FOG, if not eliminate FOG issues all together creating a cleaner safer wastewater. Do you have odor or FOG problems in your area?
Everyone on the Coast should know where their poop goes!
Sewer Authority Mid-Coastside (SAM) Meetings ~ 2nd & 4th Mondays @ 7:00pm
Watch remotely. Comments and questions by email.
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Our regular office hours are 7:00 a.m. through 4:00 p.m., Monday through Friday, excluding holidays.The Authority can be reached 24-hours a day at:
Our Mailing Address is:
Sewer Authority Mid-Coastside
1000 Cabrillo Hwy N.
Half Moon Bay, CA 94019
(650) 726-7833 (fax)
Regular Board Meetings are on the 2nd and 4th Mondays of each month at 7:00pm.
From time to time a meeting date may be changed, cancelled or relocated. Check the posted agenda for any changes to the normal schedule (click on links below).
The Sewer Authority Mid-Coastside (SAM) provides wastewater treatment services and contract collection maintenance services for a population of approximately 27,000 in the following areas:
- City of Half Moon Bay
- El Granada
- Moss Beach
- Princeton by the Sea
Chair, Representing Granada Community Services District
Vice-Chair, Representing the City of Half Moon Bay
Secretary/Treasurer, Representing Montara Water and Sanitary District
Director, Representing the City of Half Moon Bay
Director, Representing Montara Water & Sanitary District
Director, Representing Granada Community Services District