Storm Water Engineering And Bmp Design

Our team of civil and environmental engineers has extensive hands-on experience designing site-specific solutions to unique storm water quality challenges.

We have the technical background to provide turnkey solutions from the initial evaluation and feasibility analysis to bench-scale testing, engineering design, and implementation. We have applied a wide range of technologies to treat storm water runoff and have designed both passive and active storm water treatment systems to satisfy client needs and regulatory requirements. We have a high-level understanding of the compliance challenges our clients face and we can assess when active treatment controls are warranted or if other more passive compliance approaches are suitable to meet stringent discharge standards.

We have performed hydrologic calculations, analyses, and modeling to design storm water capture and conveyance systems including both large-scale watershed modeling and site-specific drainage systems.

We also have designed various storm water infiltration systems including infiltration galleries and drywells. In addition to in-situ infiltration testing, our team has expertise in evaluating site-specific pollutant sources as well as soil and groundwater conditions to assess facilities for infiltration suitability. We design appropriate water pretreatment facilities to minimize the risks associated with infiltrating storm water.

Related practice areas include:

FEATURED PROJECTS

Storm Water Treatment System Design for The Sherwin-Williams Company

San Diego, California

GSI designed and oversaw construction for a storm water capture and treatment system to comply with water quality requirements of the Industrial General Permit at a Paint Manufacturing Facility. The scope of work included developing a sampling and analysis plan to identify potential pollutant sources and bench-scale testing to evaluate and design treatment components. Hydrologic calculations and modeling were performed to design the storm water drainage modifications and size capture and treatment flow rates to satisfy the design storm standards. The treatment system includes a biopolymer injection system, settling tank, mechanical filtration, and advanced media filtration to remove dissolved metals including zinc.

Resort Construction

Northern, California

Increasingly stringent water quality requirements coupled with high demand on groundwater supply are motivating industrial facilities to consider infiltration using recharge basins, subsurface infiltration galleries and drywells. We performed in-situ percolation testing and vadose-zone modeling to design a subsurface rock-filled infiltration gallery to infiltrate treated storm water and eliminate offsite runoff. The scope of work included evaluating potential for natural and anthropogenic pollutants in underlying soils and mitigating risks to adversely impact soil and groundwater. Nested lysimeters were installed adjacent to the infiltration system to monitor pore water within the vadose zone.

Storm Water Treatment System Design for The Sherwin-Williams Company, San Diego, California

GSI designed and oversaw construction for a storm water capture and treatment system to comply with water quality requirements of the Industrial General Permit at a Paint Manufacturing Facility. The scope of work included developing a sampling and analysis plan to identify potential pollutant sources and bench-scale testing to evaluate and design treatment components. Hydrologic calculations and modeling were performed to design the storm water drainage modifications and size capture and treatment flow rates to satisfy the design storm standards. The treatment system includes a biopolymer injection system, settling tank, mechanical filtration, and advanced media filtration to remove dissolved metals including zinc.

Resort Construction, Northern, California

Increasingly stringent water quality requirements coupled with high demand on groundwater supply are motivating industrial facilities to consider infiltration using recharge basins, subsurface infiltration galleries and drywells. We performed in-situ percolation testing and vadose-zone modeling to design a subsurface rock-filled infiltration gallery to infiltrate treated storm water and eliminate offsite runoff. The scope of work included evaluating potential for natural and anthropogenic pollutants in underlying soils and mitigating risks to adversely impact soil and groundwater. Nested lysimeters were installed adjacent to the infiltration system to monitor pore water within the vadose zone.

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Matthew Hillyard,
PE

Senior Engineer

Mehran Ebrahimi,
PE

Senior Engineer

CONSTRUCTION

Engineering

INDUSTRIAL SUPPORT

CLEAN WATER ACT CITIZEN SUITS AND EXPERT SERVICES

Our team of civil and environmental engineers has extensive hands-on experience designing site-specific solutions to unique storm water quality challenges.

We have the technical background to provide turnkey solutions from the initial evaluation and feasibility analysis to bench-scale testing, engineering design, and implementation. We have applied a wide range of technologies to treat storm water runoff and have designed both passive and active storm water treatment systems to satisfy client needs and regulatory requirements. We have a high-level understanding of the compliance challenges our clients face and we can assess when active treatment controls are warranted or if other more passive compliance approaches are suitable to meet stringent discharge standards.

We have performed hydrologic calculations, analyses, and modeling to design storm water capture and conveyance systems including both large-scale watershed modeling and site-specific drainage systems.

We also have designed various storm water infiltration systems including infiltration galleries and drywells. In addition to in-situ infiltration testing, our team has expertise in evaluating site-specific pollutant sources as well as soil and groundwater conditions to assess facilities for infiltration suitability. We design appropriate water pretreatment facilities to minimize the risks associated with infiltrating storm water.

Related practice areas include:

FEATURED PROJECTS

Storm Water Treatment System Design for The Sherwin-Williams Company

San Diego, California

GSI designed and oversaw construction for a storm water capture and treatment system to comply with water quality requirements of the Industrial General Permit at a Paint Manufacturing Facility. The scope of work included developing a sampling and analysis plan to identify potential pollutant sources and bench-scale testing to evaluate and design treatment components. Hydrologic calculations and modeling were performed to design the storm water drainage modifications and size capture and treatment flow rates to satisfy the design storm standards. The treatment system includes a biopolymer injection system, settling tank, mechanical filtration, and advanced media filtration to remove dissolved metals including zinc.

Resort Construction

Northern, California

Increasingly stringent water quality requirements coupled with high demand on groundwater supply are motivating industrial facilities to consider infiltration using recharge basins, subsurface infiltration galleries and drywells. We performed in-situ percolation testing and vadose-zone modeling to design a subsurface rock-filled infiltration gallery to infiltrate treated storm water and eliminate offsite runoff. The scope of work included evaluating potential for natural and anthropogenic pollutants in underlying soils and mitigating risks to adversely impact soil and groundwater. Nested lysimeters were installed adjacent to the infiltration system to monitor pore water within the vadose zone.

Contact Us