Stormwater and Surface Water Quality Services

ADH designs, installs and operates remote automated stormwater monitoring stations that are custom-tailored to address site-specific challenges while meeting our client’s monitoring requirements.
High-flow stream gauging with ADCP raft for safe and accurate development of head to flow rating curves.
ADH staff are comprehensively trained and experienced with proper sampling protocols required with ultra low-level constituent detection limits.

ADH’s experience covers a wide range of expertise related to storm water and surface water quality management including, but not limited to, the following:

  • Implementation of Clean Water Act Section 401 water quality certification projects
  • Implementation of U.S. Army Corps of Engineers Section 404 permitted projects
  • Implementation of NPDES permitted sampling and analysis plans (SAPs)
  • Implementation of Quality Assurance Project Plans (QAPPs) and preparation of monitoring reports
  • Draft, evaluate and update Storm Water Pollution Prevention Plans (SWPPPs)
  • Municipal Separate Stormwater Sewer System (MS4) Permit SWPPP facilities inspections
  • Design, installation, maintenance and operation of flow-weighted and time-based remote monitoring and sampling stations
  • Health and Safety Plans
  • Acquisition of site access permits and encroachment permits
  • Municipal separate storm sewer system (MS4) and combined sewer overflow (CSO) monitoring
  • NPDES ocean-outfall receiving waters monitoring
  • Innovative sampling techniques for dry weather flow, illicit discharge detection, special runoff studies, and tidally influenced outfall sampling programs
  • Ultra low level constituent (e.g., mercury and pyrethroids) sampling
  • Wet weather and dry season observations and reporting
  • Stream ratings in accordance with U.S. Geological Survey methods using electromagnetically-based hand-held flow meters and Acoustic Doppler Current Profiler (ADCP) flow measurement devices
  • Creek Status Bioassessment Monitoring including Benthic Macroinvertibate and physical habitat assessments
  • Pilot scale studies to determine effectiveness and technical feasibility for reducing the discharge of TMDL parameters such as PCBs and mercury
  • Preparation of training manuals and classroom and in-the-field storm/surface water quality sampling and monitoring training
  • Establishment and evaluation of project specific Quality Assurance and Quality Control (QA/QC) programs and data validation
  • Research and preparation of literature reviews and feasibility studies
  • Participation in expert advisory panels and discussion groups
  • Data management and statistical analysis
  • Wet weather and dry season observations and reporting
  • Preparation of monitoring reports of physical, chemical, microbiological and toxicological data respectively compared to representative NPDES permit and/or receiving water quality criteria

For such studies, ADH has guided governmental agencies, municipalities and commercial clients including: the U.S Air Force, California Department of Transportation (Caltrans), utility providers, public works, Native American Tribes, commercial developers and industrial concerns through their respective waste discharge and/or NPDES Phase I and II permitting requirements. Our extensive experience with municipal separate storm sewer system (MS4), combined sewer overflow (CSO) and industrial clients has helped to identify and implement cost effective solutions for a wide range of receiving water quality and NPDES mandated compliance requirements. ADH has considerable experience working with the EPA, State Water Resources Control Board (SWRCB) and respective Regional Water Quality Control Boards (RWQCB) to successfully implement and carry out our clients monitoring programs. ADH is currently participating in ongoing multi-year regional municipal monitoring programs that are being funded by and/or involve collaboration with the California Stormwater Quality Association (CASQA), the Bay Area Stormwater Management Agencies Association (BASMAA), research institutions and other environmental consulting firms to address evolving San Francisco Bay Area water quality issues.

Automated stormwater sampling station