e began our business assisting clients with water permitting and compliance, so it’s no surprise that over 30 years later our wastewater engineers and scientists continue to lead the industry.
We are consistently selected to work on the most challenging NPDES permit issues in EPA Region VI. In fact, we were the first environmental firm in the U.S. to obtain an NPDES/LPDES permit for a merchant power plant under Phase I of the Clean Water Act 316(b) regulations.
We have successfully completed numerous Toxicity Reduction Evaluations (TREs) including developing the treatment solutions to address toxicity sources.
Services
- NPDES Permitting & Compliance Support
- Compliance Plans
- Water Quality Standards Screening
- Modeling (Water Quality, Mixing Zone, Hydraulic)
- Toxicity Reduction Evaluations (TREs)
- Water-Effect Ratio Studies
- Use Attainability Studies
- Data Management & Reporting
- 316(b) Evaluations & Comprehensive Demonstration Studies
- Storm Water/Wastewater Treatment
- Drainage Studies & Stream Surveys
- Enforcement/Litigation Support
WATER QUALITY
e began our business assisting clients with water permitting and compliance, so it’s no surprise that over 30 years later our wastewater engineers and scientists continue to lead the industry.
We are consistently selected to work on the most challenging NPDES permit issues in EPA Region VI. In fact, we were the first environmental firm in the U.S. to obtain an NPDES/LPDES permit for a merchant power plant under Phase I of the Clean Water Act 316(b) regulations.
We have successfully completed numerous Toxicity Reduction Evaluations (TREs) including developing the treatment solutions to address toxicity sources.
Services
- NPDES Permitting & Compliance Support
- Compliance Plans
- Water Quality Standards Screening
- Modeling (Water Quality, Mixing Zone, Hydraulic)
- Toxicity Reduction Evaluations (TREs)
- Water-Effect Ratio Studies
- Use Attainability Studies
- Data Management & Reporting
- 316(b) Evaluations & Comprehensive Demonstration Studies
- Storm Water/Wastewater Treatment
- Drainage Studies & Stream Surveys
- Enforcement/Litigation Support
OUR TEAM
Alex Sheffield, P.E.
Water Quality Program Manager
DIRECT: 225-923-6922
EMAIL: Alex.Sheffield@c-ka.com
As a Senior Environmental Engineer with CK Associates (engineering services provided through C-K Associates, LLC), Mr. Sheffield has focused on industrial wastewater/storm water issues and his work is primarily comprised of Clean Water Act (CWA) permitting/studies, enforcement/compliance support, and compliance plan development. He has also performed consulting and field services under the RCRA, CERCLA, and CAA programs.
Chad Cristina, P.E.
Senior Environmental Engineer
DIRECT: 225-923-6923
EMAIL: Chad.Cristina@c-ka.com
Dr. Cristina is a professional engineer and the Program Manager of CK’s Water Quality Program. His work areas focus on Clean Water Act permitting and compliance. Dr. Cristina has developed expertise in 316(b) cooling water intakes compliance in both the onshore and offshore arenas and is currently developing 316(b) permitting submittals for both arenas. Dr. Cristina is heavily involved in CK’s Toxicity Reduction Evaluation (TRE) projects and is currently managing two industrial TRE efforts. Dr. Cristina also specializes in industrial wastewater treatment and statistical process control to reduce the quantities of toxic effluents, identified through TRE and other investigations, from entering receiving waters.
Mr. LaBar is a recognized expert in National Pollutant Discharge Elimination (NPDES)/Louisiana Pollutant Discharge Elimination System (LPDES) permitting and compliance. He is involved in all phases of NPDES/LPDES permitting including preparation of permit applications and resolving complex permitting and compliance issues. He has a strong regulatory background in water quality including expertise with state and federal water quality regulations, receiving stream assessments, drainage studies, wastewater treatment, and application of water quality standards. Mr. LaBar is also a recognized expert in 316(b) of the Clean Water Act. He is experienced in 316(b) permitting and regulatory applicability determinations, data collection and evaluations, biological assessments, and engineering feasibility studies and technology evaluations.
Ms. Eues is the Quality Assurance Manager with 24 years of experience in aquaculture and in the performance, evaluation and reporting of aquatic toxicity tests. Ms. Eues is also experienced in conducting and interpreting acute and chronic TIES and TREs for both marine and freshwater species. As CK’s QA Manager for the past 10 years, Ms. Eues has been responsible for maintaining the Quality Assurance Program and the laboratory’s NELAP and TCEQ accreditation.
Mr. Hawley is a professional engineer with CK’s Water Quality Team. He is a Professional Engineer with registrations in Louisiana, Kansas, Texas and Mississippi. Mr. Hawley has experience with multi-media environmental projects including site investigation and remediation, environmental compliance, and construction management, and water treatment. His technical focus is groundwater remediation system design, implementation, and operation.
