Areas of Practice - Detailed
Industrial Pretreatment Design and Program Management
POTW Program Management
Local Limit Studies
SOP Development
Industry Inspections & Guidance
David T. Hardgrave, P.E. has more than 20 years of experience managing industrial pretreatment and wastewater programs in Oklahoma. Mr. Hardgrave supports several Oklahoma POTWs and local governments. He is a registered Professional Engineer (P.E.) in Oklahoma and holds Class B Wastewater Operator and Laboratory certifications. Mr. Hardgrave has a broad knowledge of state and federal rules and requirements, and as a former agency regulator is a leader in the industry. HEM services include:
Industrial Pretreatment Program Management for Municipalities
Industrial Pretreatment Design and Solutions for Industry
Ongoing Monitoring and Inspections to Ensure Regulatory Compliance
Water Management
SWP3 Preparation
NOI Submit for MSGP Permit
Other Industry Specific GPs
NPDES Permits
Individual Wastewater Permits
HEM provides consulting services and solutions for all industrial wastewater and stormwater needs. Services include permitting, sampling, training, management, and program design. HEM can develop wastewater and stormwater best management practices and support your company’s water management needs. Services Include:
Stormwater Permitting, Stormwater Pollution Prevention Plans (SWP3), Best Management Practices, and Ongoing Stormwater Monitoring (e.g. Quarterly Visuals and DMRs) and Management
Stormwater Permitting under Multi-Sector General Permit (MSGP) and other Industry Specific GPs
Individual NPDES Permitting and Ongoing Stormwater Monitoring & Management
Wastewater Permitting and for Various Industries
Other Environmental Services
SPCC Plans and P.E. Certification
Tier II Reports
Form R Reports
Air Permits (PBR, Minor Source)
Air Emissions Inventories
HEM can provide turn-key services or help support your company’s Environmental compliance to meet industry standards as well as State and Federal regulatory requirements. HEM can provide water, air, and land environmental compliance services.
Spill Prevention Control and Countermeasures (SPCC) Plans and P.E. Review/Certification
Tier II Reporting (Annual Reports for Storage of Hazardous Substances: EPCRA SARA Title III Chemical Tier II and TRI Form R Reports)
Minor Source Air Permitting (General Permit Applications (e.g. PBR, O&GF GP, ASNF/SNF GP, Individual Minor Source Permits)
Annual Air Emissions Inventories (AEIs) including emissions calculations and submittal