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Project 162 - Proposal - Hamers - 1999-11-01 ROBIN B HAMERS 224 E. 17TH ST SUITE 205 & ASSOCIATES, INC COSTA MESA.CA 92627 CIVIL ENGINEERS • PLANNERS • SURVEYORS (949) 549-1192 FAX(949)54S-651 S 7 November 1, 1999 Board of Directors Costa Mesa Sanitary District P 0 Box 1200 Costa Mesa, CA 92628 RE. PROPOSAL TO BEGIN PROJECT PROJECT 1112100-162 PILOT PROGRAM USE OF ENZYMES FOR GREASE AND ODOR CONTROL Dear Board of Directors: As outlined in the attached excerpt from the 1998-99 Capital Improvement Program report, the project will test the effectiveness of various enzymes and other compounds that represent the latest advancements in grease and odor control. The program goal is to reduce the Districts yearly costs of approximately$60 000 for grease and odor control. Attached for review are the 1998-99 Capital Improvement Program excerpt along with the Boyle Engineering independent review of the project. It is recommended the Board approve completion of the project at an hourly engineering fee of$63.00 per hour not to exceed$5 000 and program testing costs of$55,000 Si cerely Robin B. Ranters End. Printed on Recycled Paper �4'�ITA,* P$AN % COSTA MESA litietArclt_.,,, DISTRICT Costa Mesa Recycles �y �� � �° DIRECTORS CO'��'OR P/C James Ferryma $, = Arthu Perry Arlene Schafer Dan Worthington Nate Reath REVIEW OF PROPOSED CAPITAL IMPROVEMENT PROJECTS FISCAL YEAR 1998-99 CO 2 4r0�. N Z . C'3 It CC `S1T ChM- , • C.' OF CA\- •0P Prepared by Robin B. Hamers Manager/District Engineer FAX(714)432-1436 P.O. BOX 1200, COSTA MESA, CALIFORNIA 92628-1200 77 FAIR DRIVE (714) 754-5043 PROJECT 1112100-162 PILOT PROGRAM USE OF ENZYMES FOR GREASE & ODOR CONTROL In 1990 the District began experiencing odor problems at various pumping stations caused by hydrogen sulfides. In addition to causing odors the hydrogen sulfides combined with the moist atmosphere to form sulfuric acids which rapidly deteriorated the station equipment. Additionally field crews were constantly battling the buildup of grease which clogs lines and has an odor of its own upon coagulation in the stations. After lengthy research, the District considered various solutions to the problem including blocking agents, masking agents, air filtering, shocking agents,and chemical neutralization. Chemical neutralization was selected since the other methods treated the end result of the problem while the peroxide treated the problem closer to its cause. Chemical neutralization is achieved by the introduction of hydrogen peroxide and is currently in use at 5 pumping stations. A de-greaser is also injected at various locations as a means to fight grease. The hydrogen peroxide and de-greaser compound work independently and when added simultaneously sometimes counteract each other The District budgets approximately$60,000 per year for odor and grease control. Recently various manufacturers began promoting the use of enzymes which when introduced into the system fight both hydrogen sulfides and grease. Enzymes act like yeast and multiply and attach themselves to the molecules. Whereas hydrogen peroxide neutralizes hydrogen sulfides, enzymes introduced upstream in the system prevent the initial formation of hydrogen sulfides, thereby preventing the problem from occurring. The use of enzymes represents the state-of-the-art approach of handling the problem at its source. Since hydrogen sulfides are formed in long, flat sloping, sewer lines, enzymes are most effectively introduced regularly in the upstream portion of the sewer line. District Staff and operations crews have met with various manufacturers and are anticipating positive results when using this approach. It is proposed to sample various enzymes and chemicals and then prepare a report detailing the results. Optimistically the end result will be upgrading the effectiveness of the District's program while decreasing its cost. Engineering Meetings with manufacturers, reviewing proposals, monitoring programs, preparing final report with recommendations for the future. $ 5,000. Program Costs 55 000 TOTAL $60,000 0 BOYLE E/7S1/7EER/170" CORr=0/?13Y7O/7 1501 Quail Street P.O. Box 3030 949 / 476 3300 Newport Beach, CA 92658-9020 FAX 949 / 721 7142 Mr Robin B. I-Lamers, PE Manager/District Engineer July 30 1998 COSTA MESA SANITARY DISTRICT P O Box 1200 Costa Mesa, CA 92628-1200 Capital Improvement Program Review (1998-99) Dear Rob: I have completed my review of the District s 1998-99 Capital Improvement Program (CIP) that you sent me on Jude 17 1998. I have enclosed my independent review report as you requested. As usual, I found the CIP report to be very complete, containing adequate information for me to make my review The use of letters, vicinity maps, and recap sheets was beneficial, it made my review easier Overall, I found the CIP report to be very concise, well defined, and complete. I applaud you and the District for continuing the funding for future sewer replacement and funding for earthquake and major emergency sewer repairs. The District s management and financial ability to provide these services without increasing fees should be promoted to the end users, the residents, and businesses of Costa Mesa. Projects No. 161 and No. 163 will not only provide a safer working environment but should help the efficiency of handling a major power failure; I'm sure the field crews will appreciate the District s expenditure for these two projects. I look forward to seeing your research results on sewer age and the use of enzymes for odor and grease control. 1 would hope that you and the District would consider publishing the results of your investigations; this could go a long way in showing the end user that the District is a forward thinking agency I appreciate the opportunity to continue to work with you and serve the District. Best wishes to you, the Directors, and the District staff Boyle Engineering Corporation Bruce D Mattern, PE Assistant Managing Engineer Enclosure CIP Review Report 0C-C62-100-08/bd,dG d1198 do The reviewer recognizes that the District Engineer prepares a report which defines the results of this project; however it might be beneficial for future years to provide a very brief summary of the value of this type of work. A brief indication of percentage of pipeline unchanged versus continued deterioration, versus actual repairs would provide support for funding continuation. • Project 1112100-160 /Fairview Park Sewer Line This project will provide a gravity sewer through a portion of Fairview Regional Park and will initially provide rest room service for the Orange County Model Engineers (OCME), with future service for other rest room facilities. This will also allow the OCME to expand its facilities and to add a snack bar The District Engineer s letter of May 15 1998 to the City Manager was provided as supporting information. It is understood that this is a capital improvement project (as compared to a capital replacement project) and that the City and OCME will contribute to the construction fund. It is also understood that this project will only proceed subject to a final agreement between the City and the District. The design and inspection costs appear to be high (30 percent of estimated construction costs) unless these costs also include surveying and geotechnical services. • Project 1112100-161 / Construct Water Service to Pumping Stations Throughout the years, the District has conducted various safety type projects, i.e. converting climb- in wet well-dry pump stations to submersible where checking could be done from above ground. Also, staff has gone through training and are certified by OSHA for entering into the remaining wet well-dry well stations. This project will add a potable water supply to each of the 11 largest pump stations, thus allowing for immediate wash down in the event of chemical and/or hazardous material contact. Considering the number of locations and two different Water Districts to deal with, the proposed budget appears reasonable. ♦ Project 1112100-162 /Enzymes for Grease/Odor Control (Pilot Program) This pilot project will initiate the use of enzymes to control odor and grease. The present use of hydrogen peroxide for odor and a de-greaser sometimes counteract each other when used together The District is presently spending $60,000 per year for odor and grease control and this may not be the best use-of the District's funds. The reviewer understands that CSDOC and the Rossmoor/Los Alamitos Area Sewer District may also be experimenting with the use of enzymes and is investigating its use. The District may want to contact these other agencies to share and compare notes. The budget appears reasonable. ♦ Project 1112100-163 / Upgrade Lmergency Response Equipment The reviewer is very familiar with the effects of a power outage or electrical failure on a sewer pump station. The reviewer is also familiar with the use of by-pass pumps in the event of a power failure or break in the main line This project will purchase generators and will modify the electrical system at 11 of the most critical pump stations. This will allow for the generators to be connected directly OC-052-100-OB/gw/CMSDRPT DOC 2 f30YLE