PROJECT PRI | COLT, CA Stormwater Treatment Train Rolls

PROJECT PROFILE | COLTON, CA

Stormwater Treatment Train Rolls Into Hub City

UrbanPond®, Modular Wetlands® & DSBB

IntroductionNicknamed “Hub City,” Colton, California is home to the Colton Crossing, which was built in 1833 and was one of the busiest at-grade railroad crossings in the United States. Fast forward to the modern-day. Less than two miles south of the original Colton Crossing, on the Santa Ana River bank, are two developing industrial buildings. Strategically placed between the I-10 and I-215 freeways, these buildings offer direct access to San Diego and Los Angeles Counties, and the site is directly adjacent to the Santa Ana River. The proximity to one of the largest rivers in Southern California poses the undeniable need to treat stormwater from the 16-acre site, which will house over 200,000 square feet of warehouse space.

ChallengesCommerce and traffic will dominate this new development’s surface, leaving limited space for large-scale stormwater systems. Furthermore, Colton’s land premiums are a driving force to obtain proven stormwater solutions within a minimal footprint. Tricky soil conditions and the need to address pollutants of concern, such as oil, grease, total suspended solids (TSS), trash, debris, metals, and pathogens, along with meeting the regulations of the Santa Ana Regional Water Quality Board NPDES Permit and County of San Bernardino Water Quality Management Plan, are not easy feats.

Colton Distribution Center, Colton California

5796 Armada Drive #250, Carlsbad, CA | 855.566.3938 | [email protected] | www.biocleanenvironmental.com

Stormwater Challenges: • Limited Footprint• Local Stormwater Regulations• Wide Ranging Pollutants• Complicated Soil Conditions

Site Location

Colton Crossing

Santa Ana River





Solution, Part 1Thienes Engineering (Engineer of Record) elected to partner with Bio Clean to engineer the site and provide the most efficient solutions. This involves a treatment train of three Bio Clean devices: the Debris Separating Baffle Box (DSBB Separator), UrbanPond® stormwater storage system, and Modular Wetlands® Linear.

The UrbanPond, a traffic-rated underground stormwater storage system, was designed and produced with considerations such as height of cover, live and dead loads, proximity to adjacent structures, and required detention volume. This land-saving precast storage system allows for development above grade while providing stormwater storage below grade. UrbanPond Modules are quick and easy to install, and in this project UrbanPond LinkUP slabs were used, reducing the number of precast modules needed without compromising storage. These LinkUP slabs replace a complete module, roofing the gap when surrounded by four other UrbanPond Modules. Ultimately resulting in a traffic-rated configuration within a minimal surface footprint, saving land, money and time.

Solution, Part 2In addition, upstream of the 156 UrbanPond Modules and 37 LinkUP slabs is a hydrodynamic separator, which spearheads this treatment train design. The 5’x’10’ DSBB Separator reduces flow velocity and separates floatables like trash, debris, and oil; and settleable particles such as sediment. This pretreats the stormwater and supports the entire connected systems’ efficiency and long-term maintenance costs. The DSBB Separator is verified by NJCAT, NJDEP certified, and Full Capture approved by the California State Water Resources Control Board.

Downstream of the UrbanPond System are three 10’x20’ Modular Wetland Linear units. The Modular Wetlands provides the highest level of stormwater treatment and is the only* biofiltration product that can be placed downstream of a detention system.

The Modular Wetlands is TAPE GULD approved by Washington Department of Ecology and a CA Full Capture device known for its superior pollutant removal. The Modular Wetlands will treat downstream flows from the UrbanPond for TSS, heavy metals, hydrocarbons, and more. These units were engineered and sized for the required treatment flow rates, working together as a treatment train to address the pollutants of concern, and meet local regulations.

LinkUP Slab Installation

Downstream: Modular Wetlands (3 In-Line Units)

UrbanPond

LinkUP Slabs

*The Modular Wetlands Linear (MWS Linear) is the only biofilter utilizing horizontal flow. This proprietary design gives the Modular Wetlands Linear the unique ability to accommodate and adjust to the necessary depth of an outflow pipe on a detention system, and it is approved under Washington State Ecology, without plants (for underground or traffic rated designs).

Upstream: DSBB Separator




ConclusionThis stormwater project in Colton represents the ability to engineer a creative treatment train system that satisfies local regulations while meeting unique challenges and site constraints. A city with a once historical train crossing now features a cutting-edge stormwater treatment train. Bio Clean is always eager to build partnerships with our clients, delivering efficient treatment and storage configurations, and offering an in-house engineering team to create the best solutions for their sites.


UrbanPondTreatment Train

UrbanPond

DSBB Separator

Three Modular Wetlands Linears

Commercial Buildings

Colton Distribution Center, Site Diagram

Santa Ana River





EACH SYSTEM’S ADVANTAGES

CONTACT INFORMATIONRegional Stormwater Consultant for San Bernardino

Hal SchillingerOrange & San Bernardino Counties | Phone: (951) 348-8173 | Email: [email protected]

DSBB SeparatorSTORMWATER SEPARATOR

• Dual-stage treatment (screening and separation)

• Enhanced 3-chambered separation

• Separates trash and debris from sediment and water

• Easily installed in-line (low head loss)

UrbanPondSTORMWATER STORAGE

• The square tessellation provides superior strength and load capacity

• Designed to meet H-20 loading requirements • Can be installed deeper without the need to increase wall

thickness or add additional rebar• Every module drains down fully

• Higher void percentages and increased material efficiency for best-in-class cost per cubic foot storage

• Lighter weight and easier to install• LinkUP slab allows elimination of some modules, further

decreasing cost and installation time

UrbanPondSTORMWATER STORAGE

DSBB SeparatorSTORMWATER SEPARATOR

Modular Wetlands LinearSTORMWATER BIOFILTRATION

Modular Wetlands LinearSTORMWATER BIOFILTRATION

• Horizontal flow biofiltration• Greater filter surface area• Pretreatment chamber• Patented perimeter void area

• Flow control• No depressed planter area• Auto draindown means no

mosquito vector

Documents

PROJECT PRI | COLT, CA Stormwater Treatment Train Rolls