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HomeMy WebLinkAboutAgenda Packet - Engineering & Operations Committee - 07/23/2018EN G IN EERIN G A N D O P ERAT IO N S C O MMIT T EE J uly 23, 2018 - 2:30 PM 31111 Greenspot Road Highland C A 92346 AG E N D A C A LL TO O RD ER PLED G E O F A LLEG IA N C E PUBLIC C O MMEN T S 1.Approve the May 29, 2018 Engineering & Operations C ommittee meeting minutes 2.Plant 28 Rehabilitation Project 3.Engineering Updates for J uly 2018 AD J O U RN P LEAS E NO T E: P urs uant to G overnment C ode S ec tion 54954.2(a), any reques t for a dis ability-related modific ation or acc ommodation, inc luding auxiliary aids or s ervic es , that is sought in order to participate in the above-agendized public meeting should be direc ted to the District C lerk at (909) 885-4900 at least 72 hours prior to s aid meeting. Subject to Approval 1 Minutes 5/29/2018 bvm EAST VALLEY WATER DISRICT MAY 29, 2018 ENGINEERING AND OPERATIONS COMMITTEE MEETING MINUTES Ms. Duran called the meeting to order at 2:30 p.m. Mr. Morales led the flag salute. PRESENT: Directors: Morales, Goodrich ABSENT: None STAFF: Jeff Noelte, Director of Engineering & Operations Patrick Milroy, Operations Manager; Martha Duran, Senior Administrative Assistant; Brenda Van Meter, Administrative Assistant GUEST(s): Wayne Brown PUBLIC COMMENTS Ms. Duran declared the public participation section of the meeting open at 2:30 p.m. There being no written or verbal comments, the public participation section was closed. APPROVE THE NOVEMBER 27, 2017 ENGINEERING AND OPERATIONS COMMITTEE MEETING MINUTES Director Morales asked for a clarification on whether a motion and second was required as there are only two Directors present for these meetings. Ms. Duran will inquire with the District Clerk and provide an answer to the Directors. Both Directors motioned to approve as submitted. The minutes were approved. SET THE DAY AND TIME TO HOLD RECURRING COMMITTEE MEETINGS Mr. Noelte stated that in the past the meetings were held on the 4th Monday every other month and recommended that the committee continue the course of that schedule. The committee agreed. Ms. Duran will ensure the committee calendar is updated to reflect this schedule. OPERATIONS AND MAINTENANCE UPDATE Mr. Milroy presented the Operations and Maintenance Update. He explained that this report is also provided monthly with the General Manager’s report, but wanted to provide some explanation in more detail. He stated that there are approximately 8,000 valves in our system that staff rotates exercising throughout the years, and reviewed the various section Subject to Approval 2 Minutes 5/29/2018 bvm of the maintenance and operations reports in detail. When asked about where we find out about leaks, he responded that our best information about leaks typically comes from customer reports. ENGINEERING OVERVIEW FOR MAY 2018 Mr. Noelte presented plant 134’s hydro-electric completion. He stated that a high-pressure turnout was built to provide high-pressure imported water (State Water Project) to the hydro-electric generating equipment. The commissioning of this project took two weeks. It will be important to watch water quality going forward since the organic of the imported water varies, which impacts the formation of disinfection by-products like TTHM. Only imported water can be used to generate electricity due to the high pressures needed. The committee discussed the interconnection agreement with Southern California Edison as it applies to the hydro-electric generators and the benefits of the cost savings involved. State Water has a set price, but the availability can potentially change based on drought conditions. ADJOURN The meeting adjourned at 3:14 p.m. James Morales Phillip Goodrich Governing Board Member Governing Board Member S TAF F R E P ORT Agenda Item #2. Meeting Date: July 23, 2018 Dis c ussion Item To: ENG I NEE R I NG AND O P ER AT I O NS C O MMI T T E E F rom: O p erations Manager Subject: P lant 28 R ehabilitatio n P ro ject R E C O MME N D AT IO N: T his rep ort is p ro vided to the Engineering and O perations C ommittee for its info rmation only. B AC KGR O UN D / AN ALYS IS : T he O perations Dep artment regularly inspec ts wells, res ervo irs and pump sites to determine what maintenance is req uired to ensure maximum water produc tion and s torage capabilities. S taff bud gets nec essary fund s every year fo r P lant rehab ilitation and maintenanc e. P lant 28 was identified in fis cal year 2017-18 in need of maintenanc e and up grad es . P lant 28 is lo cated at 25385 C ourt street, the s o uth s id e o f C o urt s treet just wes t o f Del R o s a Ave. in S an Bernard ino . T his site contains a ground water well that p ro duces approximately 1500 gallo ns per minute in the lo wer zo ne. Do wns tream of the well there are four granular ac tivated c arb o n (G AC ) pressure vessels with 20,000 pound s of G AC mad e fro m c o conut s hell that remo ve Tetrac hloroethylene (P C E) b y adsorptio n. T he vessels were ins talled in 1998 and were identified in need o f maintenance. S taff inspec ted the vessels and d etermined the following defic iencies. T he internal coating s howed c o rro s io n and rust, s o they were s andblasted and rec oated with NS F ap p ro ved epoxy. Exis ting internal filter nozzles were p las tic and brittle; therefo re, they were rep lac ed with s tainless s teel nozzles . Due to the failing external o p erating valves and the vario us op erating modes , all 28 exterior valves were rep lac ed with uniform operation. Exterior coating was p rep p ed and p ainted with Dis trict S tandard G ro use Tan. Las tly, the ves s els eac h rec eived 20,000 p o und s of fresh G AC . T he ves s els were then sampled to ens ure the water meets all water quality s tand ard s and placed b ac k into servic e. T he p ro jec t d uration o f P lant 28 rehab ilitatio n was 3 months and a total cos t o f $96,000. T he new plant has an anticipated life exp ec tancy of ano ther 20 years . R espectfully submitted: P atrick Milroy O perations M anager AG E N C Y G O ALS AN D OB J E C T IVE S : G o al and O bjec tives I V - P romo te P lanning, Maintenanc e and P res ervatio n o f Dis tric t R esources b ) Enhanc e P lanning Efforts that R es p o nd to F uture Demands c) Ded ic ate Effo rts To ward S ys tem Maintenance and Mo d ernization R E VIE W B Y O T HE R S : T his agenda item has been reviewed by the executive management team. F IS C AL IMPAC T T he fis c al impac t as soc iated with this agenda item was listed in O p erating Budget F isc al Year 2017-18. ATTACH M E N TS: Description Type P lant 2 8 Rehabilitation P resentation P resentation PLANT 28A GAC VESSEL REHAB July 23, 2018 •Groundwater Well-Lower Zone 25385 Court St, San Bernardino (South Side of Court St, just west of Del Rosa Ave.) •Contaminant -PCE (Tetrachloroethylene) •Treatment Process -Activated Carbon Adsorption •Installed in 1998 •4 Low Pressure Vessels •20,000 lbs. Coconut Shell Activated Carbon/Vessel PLANT 28A KEY POINTS EAST VALLEY WATER DISTRICT Internal Vessel Inspection was Performed Equipment deficiencies were observed and analyzed •Internal Coating •Filter Nozzles •Operating Valves •Exterior Coating Each deficiency was evaluated, and budgeted for repair Repairs were scheduled to maximize existing carbon life, manage temporary production loss EAST VALLEY WATER DISTRICT Rehab Project Overview •Each Vessel was inspected and photographed during carbon exchanges •The underdrain area showed excessive corrosion •Upper chamber showed most rust accumulating in weld joints •Research was conducted to identify coating type EAST VALLEY WATER DISTRICT Internal Coating •Vessels had original coating striped •Surfaces were prepped via •Sandblast •Grinding EAST VALLEY WATER DISTRICT Internal Coating •Replacement Epoxy Based Coating was applied •NSF approved Tnemec 22 series Epoxy EAST VALLEY WATER DISTRICT Internal Coating •Existing filter nozzles were original plastic •Over time the plastic nozzles became brittle •Susceptible to breakage during carbon exchanges EAST VALLEY WATER DISTRICT Filter Nozzles •Filter Nozzles were replaced •New Nozzles-316 Stainless Steel •122 Nozzles/Vessel EAST VALLEY WATER DISTRICT Filter Nozzles •Existing valves were failing •Limited operational abilities (Series, Parallel) •Various operating modes (Reverse) •28 valves EAST VALLEY WATER DISTRICT Operating Valves •Replacement Valves were installed •Valves are uniform in operation EAST VALLEY WATER DISTRICT Operating Valves EAST VALLEY WATER DISTRICT Plant 28 GAC Water Flow Diagram Well 28 Effluent Influent Carbon Carbon Effluent •Vessel and Piping was showing primer and rust •Additional on-site equipment paint was deteriorating EAST VALLEY WATER DISTRICT Exterior Coating •Vessel Exteriors were prepped •Standard District color (Grouse Tan) and product were chosen EAST VALLEY WATER DISTRICT Exterior Coating •The vessels each received 20,000 lbs. of fresh Carbon •12 X 30 Mesh Size Coconut Shell Carbon •Sampling was completed •Vessels were placed back in service EAST VALLEY WATER DISTRICT Rehab Wrap Up •Preliminary numbers were created via informal bids •Funds were budgeted in treatment •Total Project Cost $96,300 •Project duration-3 months •Anticipated life expectancy -20 years EAST VALLEY WATER DISTRICT Funding the Rehab EAST VALLEY WATER DISTRICT Questions? S TAF F R E P ORT Agenda Item #3. Meeting Date: July 23, 2018 Dis c ussion Item To: ENG I NEE R I NG AND O P ER AT I O NS C O MMI T T E E F rom: Direc tor of Engineering & O p eratio ns Subject: Engineering Up d ates for July 2018 R E C O MME N D AT IO N: T his rep ort is p ro vided to the Engineering and O perations C ommittee for its info rmation only. B AC KGR O UN D / AN ALYS IS : Up d ates are p ro vided below for two items that involve Engineering staff. P lant 134 Hydroelec tric S ystem: T he s ystem has b een o p erating sinc e Ap ril. A web p o rtal is available to view energy generatio n data Two sc reen sho ts of this web portal are s hown in (Exhibit 1). Development Ac tivity: T he Engineering Dep artment maintains a map o f d evelo p ment ac tivity within the Dis trict’s s ervice area (s ee Exhib it 2). T his up d ate o n development activity will also be p ro vided at the regular meeting o f the Bo ard o f Direc tors o n August 8, 2018. AG E N C Y G O ALS AN D OB J E C T IVE S : G oal and O b jectives I - Implement Effec tive S o lutio ns T hrough Visionary Leadership a) Identify O pportunities to O p timize Natural R esourc es G o al and O bjec tives I V - P romo te P lanning, Maintenanc e and P res ervatio n o f Dis tric t R esources a) Develop P ro jec ts and P ro grams to Ens ure S afe and R eliable S ervices c) Ded ic ate Effo rts To ward S ys tem Maintenance and Mo d ernization R es p ec tfully s ubmitted : Jeff Noelte Directo r o f Engineering & O perations R E VIE W B Y O T HE R S : T his agenda item has been reviewed by the executive management team. F IS C AL IMPAC T T here is no fis cal impac t as s o c iated with this agend a item. ATTACH M E N TS: Description Type Attachment 1 Backup Material Attachment 2 Backup Material Exhibit 1: Screen shots of the web portal for the hydroelectric generation system at Plant 134 Exhibit 2: Development activity in EVWD service area.