Concrete Products

SEP 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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12 • September 2018 NEWS SCOPE PRECAST Oldcastle Infrastructure (formerly Oldcastle Precast, note companion item) recently announced that its BioMod System received Washing- ton State Department of Ecology equivalency approval as a stormwater bioretention planter or planter box. By granting "functional equiv- alency," the agency affirms that the BioMod Modular Bioretention System does not need to go through its Technology Assessment Pro- tocol — Ecology (TAPE) program for approval, and may be designed using the same standards and criteria as any non-proprietary bioret- ention planter or planter box. Project principals can work directly with Oldcastle Infrastructure to specify the system as a means of meeting Ecology or other agency requirements for bioretention in a complete and pre-assembled pre- cast system. A conventional, vegetated package, BioMod comprises a series of modular precast concrete sections bearing layers of mulch, bioretention media, and drain rock. Standard components include both trench and end modules as well as modules for various inlet configura- tions, pretreatment, and high-flow bypass. Module count and diameter, as well as each system's overall configuration, are determined on a site-specific basis. The BioMod system can also be configured as a stand-alone planter box consisting of a single concrete module. Trench modules can be provided with open bottoms to promote infiltration on site or with closed bottoms and underdrains to connect to downstream storm lines. The BioMod system typically incorporates non-proprietary, low flow rate media with components and thicknesses specified per local regulations. It can harbor a wide variety of plants or trees appropriate to local conditions. System approval in Washington state and other markets affords designers and engineers "a precast, prefabricated, modular option for stormwater bioretention. [They] can easily follow an agency's standard bioretention guidance to design a BioMod system to meet the stormwater treatment requirements for their site," says Old- castle Regulatory Engineer Joanna Ogintz. "[We] can provide the most cost-effective, complete bioretention system available on the market." Oldcastle retention system sees green light from key agency

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