Stell scientists and engineers have nationwide experience in Clean Water Act (CWA) Sections 401 and 404 compliance and the National Pollutant Discharge Elimination System permits under CWA Section 402. We stay current with the continuing changes in jurisdictional determinations, nationwide permits, mitigation rules, and storm water permit requirements and follow these changes as they proceed through the interagency coordination, court cases, and rule-making process. Our staff can assist you in meeting pollution control programs and water quality standards.

Successful Projects:

Stormwater / Sanitary Drain Surveys, 99th Regional Support Center-East; PA, NY, MA, WV (U.S. Army Reserve)

Stell conducted storm water and sanitary drain surveys for 16 U.S. Army Reserve Center facilities facilities to determine the discharge locations of on-site sources of process wastewater, including oil/water separators, wash racks, and boiler room discharges and ensure there were no cross connections (i.e., that storm water is not being discharged into sanitary sewers and process wastewater is not being discharged into storm sewers or surface waters). Our engineers injected non-toxic dye into the source locations and monitored down-gradient manholes, outfalls, and drainage swales for the presence of the dye. We used a closed-circuit television to identify blockages in subsurface utility lines and inspected storm water drainage structures for structural damage, clogging, erosion, and maintenance needs. Our reports documented all field activities and recommended corrective actions to repair or improve operation of the storm water drainage systems, thereby ensuring environmental compliance.


You guys did such a stellar job on the last round of drain surveys, and we have a few more that need to get done…” 99th Regional Support Center Project Manager

Drainage Utility Evaluation, U.S. Army Reserve Center Locations, Puerto Rico (U.S. Army Reserve)

Stell conducted comprehensive evaluations of facility engineering (utility) plans associated with storm water and sanitary infrastructure at 10 U.S. Army Reserve facilities in Puerto Rico. Where needed, we field-verified all storm water and sanitary drainage utility connections. Our engineers identified illicit connections and activities that were contrary to storm water regulations and facility best management practices that could negatively impact storm water and surface water quality. Each site was subject to varying local and U.S. Environmental Protection Agency environmental compliance policy issues and regulations depending on the activities at the site. We prepared a Drainage Utility Evaluation Report for each site and provided site-specific recommendations based on findings and applicable regulations. Results from this evaluation were used in making permitting decisions and prioritizing future facility drainage utility needs.