��Ʒ���þø���һ������. celebrates another successful joint venture with AECOM and Veolia on the Rialto S1 WWTP Improvements Projects along with Veolia Water West Operating Services, Inc. The plant’s effluent comprises 100% of the City’s stream flow and this expansion project required maintenance of discharge flows for the existing plant at all times.

To make this feasible, the general strategy was to build the Plant No. 5 expansion, new disc filters and new CCT Disinfection and keep them “off -line” until startup and testing were complete. Then, the new facilities could be brought online. Critical path activities included construction of Plant No. 5 facilities. As such, the timing for construction of the other plant facilities had to be so that all new facilities were ready for performance testing at the same time.

Once the new Plant No. 5 facilities were online, a final live connection/tie-in was completed at the influent pipeline without disruption of flow. The final tie-in was completed successfully, this was completed with the use of Bypass systems installed by WML. The project was completed on budget and three months ahead of schedule.

Upgrade to the existing wastewater treatment plant from 4.9 MGD to 12.74 MGD. This was accomplished by in part by replacing aging systems, including the trickling filter treatment process with a biological nutrient removal (BNR) system. Other improvements included three new secondary clarifiers, headworks, DAFT facilities, operations, warehouse, cogeneration, and blower buildings, vehicle canopy, RAS pump station, WAS EQ tank, scum pump station, W-3 pump station, chemical feed facilities and effluent polishing earthen channel to discharge to the Salinas River. Efficiency upgrades included a cogeneration system to use digester bio-gas to generate heat and electricity. Listed construction improvements were coordinated with plant staff, and completed on this multiple phased construction project while the existing treatment process remained in operation.

Construction of a 6.0 MGD expansion to an existing conventional WWTP that increases the treatment capacity up to 14.0 MGD. Construction activities include headwork’s expansion with new bar screens, washer compacter, and grit classifier, two primary clarifiers, equalization basin, bioreactor, bio filter, secondary clarifier, cloth disc tertiary filters, chlorine contact basin, recycle water pump station, masonry digester building, solar drying beds and odor control system, five electrical buildings and associated site electrical, instrumentation, piping, paving, and fencing. Upgrades to the existing plant include new centrifuges, fixed steel digester covers, odor control facilities, masonry thickener building and chemical building upgrades.

The VVWRA Subregional Plants Project includes two individual 1 MGD scalping water reclamation plants (WRP), one located in the City of Hesperia and the other in the Town of Apple Valley. They treat a portion of the local wastewater, while all solids and the balance of the wastewater continues to the main treatment plant in Victorville. This scalping design provides needed reclaimed water to local agencies as well as reduce the impact of the wastewater flows on the existing pipeline system. The two facilities include odor control filters, storm water pump stations, reclaimed water pump stations, influent fine screens, two aeration basins, inline UV disinfection, Anaergia MBR including permeate and backwash pumping, RAS and WAS pumping station, percolation ponds, distribution piping, paving, and elaborate site fencing. In addition to the WRP sites there is also a Hesperia Lift Station site with a 40 foot deep pump station, odor control filter, masonry electrical building and associated site piping, paving, and fencing. In all, there are four (4) project site locations and 5 miles of pipeline traveling through the streets of Hesperia and the Town of Apple Valley.

This project constructed a new thickening and dewatering building and odor control system to replace the existing sludge handling systems for the 100 MGD plant. The construction included 14,000 CY of concrete, 32,000 SF of elevated deck shoring, 570 CIDH piles, approx. 85,000 LF of piping, multiple story structural steel, architectural, mechanical, fire control, plumbing, electrical and instrumentation and control systems for the new thickening and dewatering building, odor control system, two (2) new tunnels, valve vault, and a screen wall as well as rehabilitation of exiting silos and truck load-out facilities. Over $4 million of VE ideas were accepted by the client.

Work on the Visalia Water Conservation Plant Upgrades project involves the upgrade of the existing trickling filter/activated sludge wastewater treatment plant, to a 22 MGD water recycling treatment plant that will produce water in conformance with California Administrative Code Title 22.

Construction includes an odor control system for the existing headworks; modification of the existing primary sedimentations basins; a new septage receiving station; a new pump station with fine screens; modifications to the existing aeration system; replacement of the existing secondary and tertiary treatment process with a new GE supplied membrane bioreactor (MBR) system, and an Ozonia supplied ultra-violet light (UV) disinfection system; improvements of the sludge digester system including modifications of the existing mixing systems within the seven existing digesters, a new 110 foot diameter digester with associated transfer pump station, a new digester gas holding system, and a new TWAS disintegration system; a new sludge dewatering system with sixteen new sludge drying beds; a recycled water pump station along with recycled water reservoirs; a renewable power generation system; installation of over ten miles of various sized pipelines; various building structures including a new Administration Building; site grading and paving; and plant wide electrical and instrumentation work.

W. M Lyles Co. joint ventured with AECOM to design and build the STI Project for the City of Davis. The upgrades to the existing 8.4 MGD wastewater treatment plant provide compliance with Title 22 requirements. The project consisted of replacing the existing oxidation pond process with an activated sludge process which included four Aeration Tanks, four 75’ diameter Secondary Clarifiers, two RAS/WAS Pump Stations, and two Scum Pump Stations. A new Blower Building with three single-stage turbo blowers provides aeration air to the Aeration Tank. The old Chlorine Contact Basin was converted into a new Primary Effluent Pump Station with four new vertical turbine solids handling pumps to transfer primary effluent to the Aeration Tank. The new solids handling facilities consists of a Dewatering Building with two screw presses, two rotary drum thickeners, thickened sludge feed pumps, and a system of sludge conveyors, a canopy covered sludge storage area, and two above grade bolted steel digested sludge storage tanks. A new Boiler Building with hot water boilers provide heat for the existing Digesters hot water loop system. The new tertiary process facilities include a covered Filter Building with four cloth disc filters, a Chlorine Contact Basin and Aeration Tank with positive displacement blowers, a Chemical Disinfection Building and an Effluent Pump Station to discharge treated wastewater into the Willow Slough bypass. The project also included a new lab building also upgrade and expand the existing Administration, and Maintenance Buildings.