Stormwater Compliance

Overview

HMH’s Stormwater Compliance division brings together the talents of our in-house civil engineers, land planners, landscape architects and certified stormwater professionals to create designs that address our clients’ needs. By maintaining interactive relationships with local and regional regulatory agencies, we are able to respond effectively to the increasingly stringent NPDES Permit requirements and provide the most comprehensive array of stormwater management services.

Erosion Control, SWPPP And NOI Preparation

HMH prepares the necessary documents for compliance with the State Water Board’s NPDES General Permit for Storm Water Discharges Associated with Construction Activity (General Permit). Our civil engineers and stormwater experts have considerable experience in the preparation of grading and erosion control plans, and are well trained in the design and application of construction-level erosion and sediment control BMPs. This allows us to efficiently produce Storm Water Pollution Prevention Plans (SWPPPs) and Notices of Intent (NOIs) for submittal to local agencies and the State Water Board.

BMP Design / LID Concepts

Best Management Practices (BMPs) include a variety of runoff treatment controls to reduce the volume, velocity, and pollutant load of stormwater runoff from a development project site. HMH utilizes landscape-based BMPs such as swales, bioretention and permeable paving to accomplish these objectives. These and other Low Impact Development (LID) techniques and concepts, which emphasize the capture, detention and infiltration of stormwater on the project site, are featured elements of the Stormwater Control and Management Plans.
In addition to designing runoff treatment controls for development projects, HMH also designs facilities that provide hydromodification management, in conformance with local NPDES Permit requirements.

Field Observation

In order to function as designed, and in compliance with stormwater management permit conditions approved by the local agency, BMPs must be properly installed and maintained. That’s why the experienced staff at HMH make regular field visits to their projects during the construction and post-construction phases. Clear communication and consultation with on-site construction supervisors minimizes liability risks for our clients, and ensures that stormwater BMPs perform as they should.

NPDES Permit Compliance

HMH is recognized throughout the Bay Area as a leader in NPDES-compliant stormwater management. In addition to project experience in multiple South Bay cities, our on-going participation in such regional agencies as the Santa Clara Valley Urban Runoff Pollution Prevention Program (SCVURPPP) gives us a broad base of knowledge of the San Francisco Bay Regional Water Quality Control Board, and local NPDES Permit regulations. HMH is included on lists of Qualified Consultants for preparation of stormwater documents maintained by the Bay Area Stormwater Management Agencies Association, the City of San Jose, and SCVURPPP.

Stormwater Control Plans / Stormwater Management Plans

HMH prepares Stormwater Control Plans and Stormwater Management Plans in conformance with local jurisdictions’ permit application requirements. The Plans are designed to integrate grading and landscape architecture with land planning, to tailor site design, pollutant source and runoff treatment control concepts to the project. All Stormwater Control and Management Plans include numeric sizing calculations, details, and operation and maintenance programs for selected Best Management Practices.