15 - PLAN TO REDUCE SSOsCOSTA MESA SANITARY DISTRICT
Protecting our community's health and the environment by providing solid waste and sewer collection services. www.cmsdca.gov COSTA MESA SANITARY DISTRICT . . . an Independent Special
District Memorandum To: The Operations Committee From: Scott Carroll, General Manager Date: September 18, 2012 Subject: Plan to Reduce SSOs Summary The Board of Directors directed the
general manager to develop a plan to reducing SSOs in each of the following categories: Roots Pump Stations Grease The plan should include tactics and a plan for future efforts
with costs and schedules. Below is such a plan. Staff Recommendation That the Operations Committee recommends to the Board of Directors approval of the plan that is described below,
to reduce SSOs. Analysis Roots In 2011, staff conducted a pilot study on Golf Course Drive to determine if a top hat and short liner system, which is a no-dig technique that uses a polyester
impregnated corrosion resistant fiberglass insert, is effective to deterring roots from entering CMSD’s sewer mainline. Within six months after inserting top hats and short liners on
Golf Course Drive, staff did not see returning roots in the mainline. Staff determined that this action is an effective tool to combat roots in sewer pipeline. Later that year, staff
identified 18 hot spot locations with root infestation and conducted a cost and comparison analysis that looked at several options to mitigate roots found in the sewer mainline. The
options staff analyzed included 50 year
Operations Committee September 18, 2012 Page 2 of 5 maintenance cost, which is the life expectancy of polyester impregnated corrosion resistant fiberglass, top hat, short liner, CIPP
and remove and replace. The analysis concluded that top hats, at $1,425 per section, and short liners, at $1,375 per section, are the most cost effective methods to mitigate root infestation.
On July 2, 2012, Project #164 was completed that included installing short liners at 12 hot spot locations for a total cost of $93,030. In addition, the District’s system-wide sewer
rehabilitation project includes short lining to rehabilitate Grade 5 sewer sections. Installing top hats and short liners is now the standard operating procedure for eliminating roots
from the District’s sewer mainline. Pump Station Ensuring sewer pump stations are performing at their optimum level is the key to avoiding SSOs. To ensure pump stations are performing
at their optimum level, an annual preventative maintenance program has been implemented where a qualified contractor will perform the following functions at each station. Removing
the motors to examine the impellers for wear. Changing the oil, checking the motor windings and general condition of the pumps. Re-installing the pumps and testing the system.
Inspecting the general condition of the control panel and internal components. Recording the run time meters and comparing for correct run times and then entering into onsite log.
An amperage reading is taken on each motor for correct operating amperage under load and recorded in onsite log. Inspecting all electrical connections in panel, using a Thermal Imaging
Instrument. Inspecting the motor starter contact points, overloads for proper operation. Operating and conditioning the Circuit Breakers and Control Fuses. Testing alarm lights
and telemetry. Examining pump well for excessive debris and grease. An assessment and percentage of debris is indicated on the service report, recommending clean out if needed. The
pumps will be observed in normal (automatic) operation and in Hand operation. Check valves are visually inspected for operation, leaks and excessive corrosion. Gate/plug valves are
exercised.
Operations Committee September 18, 2012 Page 3 of 5 Station is observed in a normal working operation and with all control enclosures closed. Any potential problems or recommendations
are submitted in writing after each service. The total cost in 2012 for the PM program is $36,511, and it typically begins in March of every year. In addition, District staff will inspect
all twenty pumps five days a week. During their daily inspections, staff will check log pump times, visual inspection of wet wells, enclosures, security checks, and level controller.
The District’s maintenance staff will also make necessary repairs such as installing new starters, heaters, fuses, transducers, pumps, floats and relays. Staff also spends approximately
4 hours a month de-ragging pumps. Grease The District has a very successful FOG program for restaurants. There are over 500 restaurants within the District and the District requires
them to use best management practices and have a grease interceptor to prevent grease from entering the sewer system. EEC is the contactor that administers the District’s FOG program
and routinely inspects the restaurants to ensure compliance. EEC cost to the District is $100,000 annually. Last year, the District implemented the first of its kind Residential FOG
Recycling Program where residents can easily drop off their unwanted kitchen grease at the OCC Recycling Center free of charge. The only cost to the District is the purchasing of FOG
funnels that are available free for residents. The cost for the funnels is $1,376 for purchasing 500 funnels. A third method the District is utilizing to prevent grease from causing
an SSO is applying a chemical in the sewer main called “Grease-X.” There are two products of Grease X staff wants to test. The first one is called “Grease-X Jet.” Grease-X Jet is specially
formulated for use with jetter trucks that will unblock grease. Grease X Jet contains no halogenated or petroleum solvents. Unlike many solvent-based cleaners, Grease-X Jet breaks down
grease, oil and petroleum products without generating toxic flammable vapors. The second chemical is called “Grease-X Biozyme”, which is a preventative maintenance treatment that keeps
FOG from building up in the sewer system. The Biozyme is a highly concentrated microorganism that coat piplines and lift stations, digesting FOG and other organic matter as it flows
through the sewer system. It is applied by mixing the chemical with water and simply pouring it down a manhole and then jet the line. Staff is going to conduct a pilot program at several
hot spot locations to determine the effectiveness of this product. On August 29, 2012 a planning meeting was scheduled in which the following procedures will be followed:
Operations Committee September 18, 2012 Page 4 of 5 1. CCTV, using NPS, at the end of the frequency cycle. 2. Jet the half the lines using Grease X Jet formula. 3. CCTV, using NPS 4.
Apply Grease X Biozyme 5 days in a row for the first week. 5. Apply Grease X Biozyme once a week for the next 4 weeks 6. CCTV, using NPS 7. Three months later, CCTV using NPS 8. Review
the videos and assess the results. Staff will report back with the results and make a recommendation to continue using Grease-X on a regular basis or not. Strategic Plan Element & Goal
This item complies with the objective and strategy of Strategic Element 1.0, Sewer Infrastructure and the following Strategic Goals: 1.3 Hot Spot Abatement Program 1.5 Sewer Line Maintenance
Cleaning Program 1.8 Fats Oil Grease (FOG) Program Legal Review Not applicable Financial Review Roots Top hats will cost $1,425 per section, and short liners will cost $1,375 per section.
Pump Station A preventive maintenance program will cost $30,000 to $40,000 a year. Grease Enforcement of Best Management Practices for over 500 restaurants is costing $100,000 a year.
The Residential FOG Recycling Program is costing $1,000 to $1,500 a year. Cost for the Grease-X pilot program is not finalized, but projected to be $6,000. Public Notice Process Copies
of this report are on file and will be included with the entire agenda packet for the September 18, 2012 Operations Committee meeting at District Headquarters and on District website.
Operations Committee September 18, 2012 Page 5 of 5 Alternative Actions 1. Do not approve the second amendment and direct staff for more information. Attachment A: Grease X