Who We Are

M. S. Hatch Consulting, LLC (MSHC) specializes in air quality permitting and compliance; stormwater management and training; strategic regulatory planning; sustainability management and plans; California and federal greenhouse gas (GHG) inventory, reporting, and assessments; and California Air Resources Board (ARB) Diesel Program compliance. MSHC has a professional, full-time staff of 11 engineers and scientists, supported by two part-time employees in offices in Irvine, Los Angeles, San Diego, Long Beach, and Santa Barbara, CA. Our senior staff has an average of 25 years of experience performing air quality projects in Southern California.

MSHC’s staff mix offers a range of experience, qualifications, and expertise, which, coupled with our business size, allows us to be nimble and cost-effective.



Woman-Owned Small Business

California Unified Certification Program - Certified Disadvantaged Business Enterprise

SBE certified by the Coalition of Southern California Public Agencies

Certified Small Business Enterprise and VSBE – Port of Long Beach

DUNS: 969023139


TIN: 45-3085034

Our Services

Air Quality Permitting – NSR and Title V +

MSHC’s staff has New Source Review (NSR) and Title V permitting experience at several California Air Districts (see Agency Relationships). We have an outstanding reputation with the regulatory agency staff, which directly benefits our clients in negotiating favorable permit conditions. We have performed numerous Best Available Control Technology (BACT) evaluations and cost-effectiveness calculations for industrial equipment and processes, including internal combustion engines, gas turbines, engine test cells, and spray booths.

Compliance Audits and Plans +

MSHC provides compliance audits, as well as applicability assessments, compliance plans, and implementation assistance for compliance with federal, state, and local air quality regulations. For nearly two decades, MSHC staff has supported the military and private industry with detailed National Emission Standards for Hazardous Air Pollutants (NESHAP and New Source Performance Standards (NSPS) assessments, including:

Our staff is also experienced in determining applicability and planning for compliance with rules and regulations promulgated by the California Air Resources Board (CARB) and local California Districts (see Agency Relationships). We proactively participate in the rule development process, often on behalf of our clients, to provide input during the process and prepare our clients for compliance.

AB 2588 Inventory, Risk Assessment, and Risk Reduction +

MSHC provides Assembly Bill (AB) 2588 Air Toxics "Hot Spots" Program support to facilities in California. Our services include:

  • Air Toxics Emission Inventories, including plan and report preparation
  • Screening and detailed Health Risk Assessments (HRAs)
  • Public notification support
  • Risk Reduction Plan preparation

MSHC has provided a detailed analysis of prioritization scores to eliminate the requirement to complete a full HRA and save the client both time and money. MSHC staff have also managed HRA projects that drastically reduced public notification requirements by negotiating representative emission factors with the regulatory agency.

CARB Diesel Program Compliance +

CARB has identified particulate emissions from diesel engines as toxic air contaminants based on their potential to cause cancer and other adverse health effects. To reduce these emissions, CARB developed diesel PM targeted Airborne Toxics Control Measures (ATCMs) and vehicle fleet regulations to regulate emissions from diesel engines and large spark-ignition (LSI) off-road engines. These include the following regulations:

MSHC provides inventory, emission calculations, compliance plan development, and reporting services for compliance with these regulations. MSHC is currently providing ARB Diesel Program support to the City of San Diego, and Navy Region Southwest (NRSW). Previously, MSHC staff managed region-wide ATCM, ARB Diesel Program, and LSI compliance projects for Marine Corps Installations West (MCIWEST) and NRSW installations.

GHG Management, Inventories, and Verification +

MSHC staff has considerable experience in performing GHG emissions inventories for various protocols and programs, including both California AB 32 and U.S. Environmental Protection Agency (EPA) Mandatory Reporting for various reporting categories/industries. Since the inception of the state and federal GHG regulations, MSHC staff has actively participated in the regulation development process and supported clients with applicability analyses. For example, MSHC supports the Region 9 DoD Air Quality Task Force in tracking and preparing for compliance with California AB 32 and federal GHG regulations.

MSHC staff has assisted many clients in their initial GHG emissions reporting, including creating a GHG emissions management program and training sessions, GHG Monitoring Plans, and Cap-and-Trade strategies; preparing e-GGRT submissions; and providing support during 3rd party verification. MSHC staff also has extensive knowledge and experience in completing applicability assessments and compliance plans with the numerous AB 32 GHG regulations, such as those regarding landfill methane, refrigerants, SF6, commercial recycling, and other developing early action measures.

Previously, MSHC staff completed a comprehensive fenceline-to-fenceline GHG assessment for eight MCIWEST installations and Edwards AFB. The projects included the preparation of a GHG assessment report that comprised:

  • A complete GHG inventory;
  • A review of potential carbon credits from Base projects;
  • Analysis of AB 32 compliance requirements;
  • EPA GHG Mandatory Reporting Rule assessment and reporting;
  • GHG Tailoring Rule for Title V and PSD Permitting assessment; and
  • GHG inventories based on the Federal GHG Accounting and Reporting Guidance for EO 13514.

MSHC staff calculated GHG emissions from Scope 3 and mobile sources and an inventory of water/energy conservation projects and vehicle fleet management requirements throughout MCIWEST.

Sustainability Management and Plans +

MSHC staff has extensive experience in federal sustainability requirements, most notably Executive Order (EO) 13514. MSHC staff has worked on developing regional sustainability programs and strategic sustainability performance plans, including:

  • Sustainability metric tracking for GHG management;
  • Energy and water usage and conservation;
  • LEED certification;
  • Fleet management;
  • Sustainable acquisition (green procurement);
  • Pollution prevention;
  • Electronics stewardship;
  • Sustainable planning; and
  • Waste diversion.

Previously, MSHC staff managed and executed a project to understand and evaluate MCIWEST’s business processes to help develop the MCIWEST Sustainability Management Program and Draft MCIWEST Order 5090.3. MSHC staff also mapped the Environmental Management System (EMS) business process (e.g., Goals, Objectives, Targets, and Actions) to meet the EMS implementation requirements for EOs 13423 and 13514, DoD SSPP, and USMC SSPP with a SQL-based web application called the Sustainability Management Tool (SMT). The SMT is an enterprise-wide tool to centralize and standardize sustainability mandates and projects planned in order to meet those mandates. The SMT collects sustainability metrics across each facility in the region and provides real-time analysis on the facility's progress towards meeting the mandates. The SMT includes features that roll up facility sustainability metrics to be viewed at the regional level, as well as reporting functionality to access specific sustainability metrics. The SMT gives managers and key decision-makers the information needed to prioritize resources in order to achieve the maximum sustainability benefits.

MSHC staff supported NAVFAC SW and MCIWEST in presenting the SMT to the Assistant Secretary of the Navy for Energy and Environment and Commanding Officers and Leadership staff at Marine Corps Air Station Yuma and Marine Corps Base Camp Pendleton. MSHC continues to provide user support to the SMT, as well as conducts training for MCIWEST users, both in-person and via webinar.

MSHC staff also prepared Installation Sustainability Performance Plans for several MCIWEST installations to track compliance and recommend projects to meet the sustainability metrics outlined in the MCIWEST Order 5090.3. The Installation Sustainability Performance Plans provide the sustainability metrics and projects that is to be loaded on the SMT.

MSHC staff also compiled global Department of Navy sustainability requirements in order to assess their status with meeting the metrics laid out in various sustainability mandates for NAVFAC Headquarters.

Stormwater +

MSHC staff has experience and familiarity with the NPDES General Permits for Stormwater Discharge from Industrial Activity (IGP), Construction Activity (CGP), and the Municipal Separate Storm Sewer System (MS4). Our staff has experience with permitting from Notice of Intent (NOI) through Notice of Termination (NOT). This includes SWPPP preparation, amendment, and implementation. Our staff includes QSDs/QSPs, QISP, and a trainer of record. We provide inspectors and samplers to meet the permit requirements. We have prepared exceedance response action (ERA) documents, rain event action plans (REAPs), and have trained and worked with clients to maintain SMARTS, including uploading annual reports, NOI, and NOT. We help our clients with no exposure certification (NEC), notice of non-applicability (NONA), reduced sampling frequency, and pride ourselves on providing cost-effective solutions for compliance. Our trainer of record provides training for all general NPDES permits and has acted as compliance group leader for over twenty industrial transportation facilities. Due to the recent stormwater discharge standards, some facilities are required to implement advanced BMPs including treatment systems that meet numeric effluent standards. MSHC works with vendors to warranty treatment systems that meet the stringent discharge standards or assist with alternative compliance options. When needed, we assist with NOV response and work with clients to avoid fines. Our clients include construction contractors and developers, industrial facilities, utilities, municipalities, Caltrans, and other transportation agencies.

Stormwater Services Offered:

  • SWPPP Development
  • BMP and Treatment Design
  • SMARTS, AdHoc/Annual Reporting
  • Exceedance Response Action
  • Training
  • Inspections

Our stormwater practice is led by John Gleason, who brings more than 30 years of experience to MSHC. Mr. Gleason is a professional engineer certified as a Stormwater Pollution Prevention Plan (SWPPP) developer and trainer of record. He has trained over 200 Qualified SWPPP Developers-Practitioners (QSDs-QSPs), over forty Qualified Industrial Stormwater Practitioners (QISPs), and myriad field staff. He has managed compliance projects for National Pollutant Discharge Elimination System (NPDES), General Permits for Construction, Industrial, and Municipal activities, as well as dewatering and individual permits. Mr. Gleason has supported utility agencies, developers, municipalities, industrial facilities, and construction companies. His clients include Southern California Edison (SCE), Irvine Community Development Company, Gerdau, Riverside Transportation District, Los Angeles (LA) Metropolitan Water District, LA County Metropolitan Transportation Authority (LA Metro), Marine Corps Installations West (MCIWEST), Turner Construction, Ametek, and Caltrans. Previously, Mr. Gleason worked for LA County Public Works as an Environmental Compliance Manager.

Check out our Training link for upcoming Stormwater related training!

Who We Serve

Federal Government

Naval Facilities Engineering Command Southwest Marine Corps Air Ground Combat Center Twentynine Palms Marine Corps Air Station Miramar Naval Base Coronado Naval Air Weapons Station China Lake Naval Air Facility El Centro Naval Base San Diego Naval Base Point Loma Naval Base Ventura County Naval Weapons Station Seal Beach Edwards Air Force Base Fort Irwin National Training Center

State/County/Local Governments

City of San Diego Environmental Services City of San Diego Public Utilities Department Port of Long Beach


Alcomp Antelope Valley Engineering, Inc. Applied Energy, LLC BAE Systems BYD Coach and Bus Callaway Golf Company CP Kelco Kinkisharyo International LLC NASSCO Paradigm Design, Inc. Paramount Pictures R&F Products Royal Investors Group, LLC Seafood City Solar Turbines, Inc.

Engineering/ Environmental Firms

ACTenviro AECOM Battelle Biogas Engineering Geosyntec IO Environmental Kleinfelder, Inc. KMEA M.B. Technical Services NOREAS Scientific Resources Associated SCS Engineers Trevet Wood Environment & Infrastructure Solutions URS

Agency Relationships


Mobile: 949.892.9515