Precast Solutions - March/April 2008 - (Page 8)

UNDERGROUND RIDING PROJECT PROFILE Project: Malibu Creek Plaza, Malibu, Calif. Description: A shopping plaza located in an environmentally sensitive area near Surfrider Beach. Owner: Malibu Creek Preservation Co. Engineer: Lombardo Associates Inc., Newton, Mass., and Malibu, Calif. Contractors: BioSolutions, Agora Hills, Calif.; and Integrated Water Services Inc., Pleasanton, Calif. Precaster: Jensen Precast, Fontana, Calif. THE NEAR FAMOUS WAVES SURFRIDER BEACH IN PHOTOS COURTESY JENSEN PRECAST AND LOMBARDO ASSOCIATES INC. Lombardo Associates Inc. of Newton, Mass., was retained to engineer a compliant wastewater management system to protect the lagoon and beach. The previous system was a conventional one consisting of grease interceptors, septic tanks and gravel drainfields, which provided insufficient nitrogen and bacteria removal. According to Pio Lombardo, company president, the firm designed a cost-effective wastewater management system that employs a septic tank effluent pump (STEP) collection and treatment system. It consists of the Nitrex nitrogen removal technology, Advantex recirculating media pretreatment of septic tank effluent and an ozone-UV disinfection system for bacteria removal. Integrated Water Services Inc. of Pleasanton, Calif., DEVELOPMENT CALIFORNIA BENEFITS FROM PRECAST CONCRETE. BY BRIDGET MCCREA W hen they’re shooting tubes, hanging ten and carving up the waves, the last thing surfers want to worry about is whether the water they’re immersed in is clean. Thanks to a project involving precast concrete, the beach boys and girls hanging out at the famed Surfrider Beach in Malibu, Calif., can rest easy knowing that the water they’ve chosen to swim in is indeed safe. That wasn’t the case until recently, however, as an inefficient wastewater management system from nearby Malibu Creek Plaza had been muddying the waters. Effluent had been entering Malibu Creek, which empties into Malibu Lagoon and is adjacent to Surfrider Beach, recalls Steve Braband, owner of Agora Hills, Calif.-based BioSolutions Inc. CLEAN BEACHES constructed the system, relocated the utilities and handled the dewatering aspect of the project. IWS performed all construction activities for the project, which included piping, excavation, concrete, electrical, setting tanks and other miscellaneous site work. The scope of work for construction included modifications to the collection system, installation of a new treatment system and retrofitting of the existing dispersal fields. Once the water was pumped down, it was stored, tested and treated using an on-site treatment system provided by Pure Effect Inc. of Orange, Calif. Then it was time for precast concrete to make its grand entry. Specified by the engineer, the precast treatment tanks were used to satisfy requirements to minimize the depth of the excavation and accommodate Nine years ago the California Regional Water Quality Control Board (CRWQCB) and the City of Malibu conducted groundwater and surface water samplings at Malibu Creek Plaza and the nearby area and determined that the wastewater discharge was causing groundwater pollution and adversely impacting Malibu Creek and Malibu Lagoon. “Surfers were complaining about getting sick and were pointing their fingers at the commercial entities and a treatment plant situated about three and a half miles upstream,” says Braband, whose firm worked with several “very stringent” waste discharge permits designed to meet present standards while warding off potential issues in the future. 8 PRECAST SOLUTIONS | MARCH/APRIL 2008 http://maps.google.com/maps?client=safari&rls=en&q=surfrider+Beach+California&ie=UTF-8&oe=UTF-8&um=1&sa=N&tab=wl

Table of Contents Feed for the Digital Edition of Precast Solutions - March/April 2008

Precast Solutions - March/April 2008 Contents Smooth Move Riding the Waves Comparing RCP With Plastic Pipe Cost-Value Analysis of Storm Sewer Pipe Concrete Testing On a Grand Scale Building Confidence

Precast Solutions - March/April 2008

For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.