Industrial Facilities Research and MS4 Review

Date / Time:
Wednesday, Sep 16 3:05pm to 3:35pm
Track / Session:
Track: Industrial / Session 8

This presentation will provide an overview of the methods and results of ongoing research, review, and tracking of Industrial General Permit (IGP) facilities within the unincorporated areas of the County of San Diego.  IGP facilities are identified via the State Water Resources Control Board’s Stormwater Multiple Application and Report Tracking System (SMARTS) database that are within the Regional Water Quality Control Board’s (RWQCB) Region 9 (project area). The list of industrial facilities in the SMARTS database for the project area is compared to the list of industrial facilities in the County’s inventory. Industrial facilities in the SMARTS database that have water quality objective exceedances are reviewed and evaluated on their Exceedance Response Actions and whether their Stormwater Pollution Prevention Plan is currently up to date. Facilities with exceedances are also evaluated for their potential to discharge to the County’s MS4 system or receiving waters.


This year, the County added an additional research task in response to California Senate Bill 205 (2019).   SB205 ensures industrial businesses obtain coverage when subject to regulation under the IGP.  It does so by requiring an entity applying to a city or county for a new or renewed business license to demonstrate enrollment in the IGP, if it is required per their Standard Industrial Classification (SIC) code.  Identifying these qualifying industrial businesses can present a challenge in jurisdictions where business licenses are not required.  Therefore, a comparison through the Dun & Bradstreet business SIC code registry and those listed in the County’s and Regional Water Quality Control Board’s databases were reviewed to help identify possible non-filers.


This annual research helps the County of San Diego meet MS4 permit compliance by updating their industrial inventory every year and by identifying potential IGP non-filers.  The presentation will discuss how the County further uses this data to ensure businesses are in compliance with the County’s Watershed Protection Ordinance and how the County helps navigate industrial businesses through complicated State and local regulations.  Furthermore, the research using Dun & Bradstreet data may offer a tool to other jurisdictions on how to identify potential IGP non-filers.

Primary Speaker:
Christine Tolchin, County of San Diego

Christine Tolchin is a Program Coordinator for the County of San Diego’s Watershed Protection Program. She oversees the Existing Development Group and helps to ensure municipal, industrial, commercial, and residential compliance with stormwater regulations.  Christine has been with the County for 15 years, with over 13 years in resource management and watershed protection.  She has a bachelor’s and master’s in Biological Sciences and is a certified project manager, QISP, CPESC, and QSD. 

Supporting Speaker 1:
Jesse Scolavino, Brown and Caldwell

Born  and raised in the Bay Area, Jesse went to San Diego State University and majored in Environmental Engineering with a minor in Geological Sciences. Since she started her career at Brown and Caldwell in late 2016, she has been focusing on stormwater, groundwater and environmental compliance projects and is excited to possibly attend her first ever virtual conference at CASQA 2020! In her spare time, she is an avid runner has run dozens of half marathons and marathons and also a 100k!

Supporting Speaker 2:
Laura Carpenter, Brown and Caldwell