Concrete Products

AUG 2018

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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www.concreteproducts.com August 2018 • 49 FEATURE CATALINA PACIFIC CRITICAL SUPPLY LINES Pivotal to any ready mixed producer's adoption of natural gas-fueled truck power is investment in internal fueling infrastructure or plant proximity to fleet-friendly commercial CNG fueling stations. Gas is measured in diesel gallon equivalents (DGE) as a reflection of initial and post-duty cycle(s) fuel tank psi levels. To keep natural gas compressors below power consumption peaks affect- ing electricity rates, a plant-based fueling system typically is designed as "time fill," with trucks a) clustered around gas line- and port-bearing island; and, b) refueling overnight to tank psi targets. Catalina Pacific has internal and commercial CNG fuel supplies. It contracted with an engineering, construction and service specialist, Ozinga Energy, to build fueling infrastructure and stations at its Alameda and Normandie plants, serving downtown Los Angeles and the Long Beach area. Ozinga Energy emerged from a seven-year program in which Ozinga Ready Mix Concrete built CNG supply, compressor and fueling infrastructure at five plants in northern Illinois and Indiana, including its largest sites, Mokena, Ill. (headquarters) and Chinatown (downtown Chicago). The Alameda and Normandie plants are respectively equipped with compres- sor capacity and fueling islands for 40 and 23 mixers. They refuel off hours in time fill mode. The remaining CNG mixers are based at Catalina Pacific's Canoga Park, El Segundo, LAX (Los Angeles International Airport) and Sun Valley plants. They refuel in "fast fill" mode—five gallons or DGE per minute—at Clean Energy public stations located one to five miles from the plants. The McNeilus NGEN fuel system has 75 DGE capacity, although drivers fill to 30 gallons for a typical day and routing. The new Catalina Pacific mixers are projected to consume an average of 75,000 gallons of Redeem monthly, displacing upwards of 8,400 metric tons of greenhouse gas emissions annually. "CalPortland has been a trailblazer in sustainable initiatives, and to date has made the largest investment in natural gas vehicles within the concrete industry in the western United States," notes Clean Energy Vice President of Sales Chad Lindholm. "By converting its fleet to the new clean natural gas engine technol- ogy and Redeem, CalPortland will dramatically reduce the amount of smog and greenhouse gases it produces." "Switching to zero emission engines fueled by renewable natural gas instead of diesel has been a real game changer," affirms Allen Hamblen. "We look forward to continued exploration of clean alternatives that will make a positive impact on the environment and demonstrate our commitment to the community." A natural gas fueling infrastructure business grown in-house at Illinois-based Ozinga Bros. Inc., Ozinga Energy designed the Normandie plant cabinet with twin compressors, each driven by 125-hp motors. They operate on alternating days and yield 2.2 gallons per minute, based on a Catalina Pacific-prescribed cycle. In addition to main time fill/mixer truck island lines (note page 47), the Normandie com- pressors also charge a spherical tank supplying an adjacent, single-vehicle fast fill station—available for mixer trucks running low on fuel during normal operating hours, or smaller vehicles with CNG power. Redeem renewable natural gas, supplied by Clean Energy through Southern California Gas Co. lines, is piped to a dryer (above, right) at the Normandie station, then enters a chamber at 30 psi for compression. Compressed gas is fed to the time fill station lines. The McNeilus NGEN tanks are full when pressure reaches 3,600 psi.

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