Environmental Consulting & Remediation Firm

Donna Letterle

Kenneth Dudash, P.E.

Mr. Dudash has over 30 years of professional experience in the environmental consulting and remediation services industry. Prior to joining Letterle in 1998, Mr. Dudash was a remediation engineer for multiple national environmental consulting firms where he designed and supervised the installation of remediation systems throughout the Midwest and the northeast states, primarily in Pennsylvania, Michigan, and West Virginia. Mr. Dudash provides a level of sophisticated high-level technical support to the Letterle project management team in areas such as environmental remediation system design, permitting, implementation, operation, evaluation, and site closure. As a Senior Project Engineer at Letterle, Mr. Dudash is responsible for the design and installation of remediation systems using a variety of technologies including multi-phase extraction, bioremediation, chemical oxidation and air sparging. Mr. Dudash develops procedures to be used for remedial pilot tests, prepares remedial pilot test reports, engineering design and specification packages, and remedial action plans. His daily activities also include the supervision and mentoring of technical staff within the Letterle Engineering Department and coordination with clients, environmental regulators, third-party consultants, property owners and other independent parties and subcontractors during the remediation phase of an environmental project. Mr. Dudash also prepares construction, NPDES/sanitary discharge, and air quality operating permits for remediation projects and completes SPCC/PPC for multiple clients in various states. Mr. Dudash earned a Bachelor of Science degree in Civil Engineering and a Master of Science degree in Environmental Engineering from West Virginia University, is a Registered Professional Engineer (PE) in Pennsylvania, and maintains the OSHA 40 hour training and supervisor certification.

Laurie Hall, P.G.

Laurie earned a Bachelor of Science degree in Geosciences from Penn State University and is a Registered Professional Geologist in Pennsylvania. Laurie’s professional career started at Dames and Moore, LLC in 1987, where she monitored drilling of borings into soils and rock formations for many projects in Pennsylvania and other states such as New Jersey and Indiana. She supervised field operations including company personnel, multiple drilling crews, and subcontractors at private, commercial, and government facilities. After joining Letterle in 2005, Laurie has gained a working knowledge of the regulations and guidance for Pennsylvania Underground Storage Tank Closures and the Pennsylvania Land Recycling and Remediation Standards Act (Act 2). Her duties primarily include technical writing, data analysis, and associated preparation of quarterly Remedial Action Progress Reports, Site Characterization Reports, Remedial Action Plans, and Remedial Action Completion Reports for submission to the PADEP. Data analysis responsibilities include Quick-Domenico groundwater modeling and groundwater results graphing to assess data trends over time. She also provides technical review of reports and data QA/QC. If not at work, Laurie enjoys spending time with friends, her husband, canine daughter, and when possible adult sons and daughter-in-law, including gaming, stand-up- paddleboarding/kayaking, walking, and traveling.

Pete Weir

Pete holds a Bachelor of Science in Geology from the University of Pittsburgh. In the 10 years prior to joining Letterle, Pete worked at multiple environmental consulting firms as a staff geologist including Turner Environmental, Blasand Blouck and Lee, BL Companies, and the Hutchinson Group, where he supervised the installation of boreholes and monitoring wells, conducted gas-probe monitoring, surface water, and groundwater sampling at multiple Mid- Atlantic region solid and hazardous waste sites. Pete has a strong working knowledge of the Pennsylvania, Ohio, and West Virginia underground storage tank regulations, Pennsylvania Act 2-The Land Recycling and Remediation Standards Act, and waste management regulations. Since joining Letterle in 2005, Pete’s primary responsibilities include serving as health and safety officer, coordinating subcontractors, managing field staff, aquifer characterization studies, remediation oversight, and report preparation. Pete’s current safety training includes OSHA Hazardous Waste Operations and Emergency Response and Waste Management Safety Training. Outside of work, Pete enjoys spending time outdoors with his wife and two teenage boys, mountain biking, and racing his off- road motorcycle at regional hare scrambles.

Laura Weir

Laura holds a Bachelor of Science in Geology and Environmental Science from Muskingum University. Laura’s professional career started in 2000 with the Hutchinson Group where, as a Senior Geophysicist, she performed hundreds of geophysical investigations across the United States. She has extensive experience utilizing: frequency- and time-domain electromagnetics, ground penetrating radar (GPR), utility tracing, very low frequency (VLF) for fracture analysis, electrical imaging (resistivity) and magnetics. In 2006, Laura joined Civil & Environmental Consultants, Inc. (CEC) of Pittsburgh, PA, where she managed environmental due diligence investigations and served as geophysical services lead for clients in the commercial and industrial sectors. After joining Letterle in 2011, Laura has gained a working knowledge of the Pennsylvania Act 2 Land Recycling and Remediation Standards Act, preparation of Spill Prevention Control & Countermeasure (SPCC) plans, Pennsylvania Preparedness, Prevention and Contingency (PPC) and Spill Prevention Response (SPR) plans, and West Virginia Groundwater Protection Plans (GPP). At Letterle, Laura’s primary responsibilities include managing due diligence investigations (Phase I and II Environmental Site Assessments), geophysical projects, preparation of spill plans and stormwater permitting, groundwater contaminate fate and transport modeling, and contract preparation. Laura’s current safety training includes OHSA 10-Hour Construction Safety and OSHA Hazardous Waste Operations and Emergency Response. Outside of work, Laura enjoys traveling and going on outdoor adventures with her husband and two teenage boys. Laura is also a volunteer with her local Boy Scout troop, where she actively serves as the Committee Chair.

Kristen Koch

Kristen earned a Bachelor of Science in Environmental Science from Mercyhurst University. Kristen’s professional career started at Rhea Engineers & Consultants, Inc. where she performed wetland delineations and environmental assessments, collected groundwater samples to monitor landfills on Naval Bases in Virginia and Maryland, and inventoried hazardous waste at Military and Naval bases. In 2022, Kristen started working as a Staff Scientist for Letterle where she gained field experience sampling soil and groundwater and overseeing the advancement of soil borings, installation of monitoring wells, and well abandonments. Kristen also completes office duties including the preparation of reports, tables, maps, and charts. Outside of work, Kristen enjoys traveling with family, and hunting and fishing with her husband.

Jacob Golab

Jacob started his career by joining Letterle in 2024 after graduating with a Bachelor of Science degree in Biology from the Pennsylvania State University - Erie (Behrend) campus. He is currently a Staff Scientist for which his duties include groundwater, soil, and vapor sampling, remediation system installation, remediation system operations and maintenance, installation of monitoring wells, and providing oversight for environmental chemical injections. Jacob is also OSHA HAZWOPER certified. Outside of work, Jacob enjoys fishing, camping, rock climbing, skiing, and spending time with his family and his cat while cheering on the Pittsburgh sports teams.

Megan Thornton

Megan earned her Bachelor of Arts degree in English: Professional Writing from La Roche University. Knowing she wanted to write, but not knowing what area she wished to focus on, she found a position in Accounts Receivable at Del Monte Foods, where her father and sister also worked. Her department was eventually outsourced, and Megan went on to work in Accounts Receivable at StarKist, as well as at OneDigital Health and Benefits as a Third Party Administrative Manager. Megan started working at Letterle & Associates in June 2018 as the Accounting Administrator to the company. She handles the invoicing, payables, and receivables for all three offices. In her free time, Megan enjoys spending time with her husband and cat, walking, reading, writing and dancing.

Katie Korsak

Katie graduated magna cum laude from Carlow University with a Bachelor of Arts in Elementary Education in 2005. During her four years at Carlow University, she was a member of the Honors Program, graduating with the distinction of Carlow Scholar. Katie’s professional career in payroll began in 2006 at Del Monte Foods where she was responsible for the timely and accurate processing of both hourly and salary payrolls for multiple locations across the country. She became the go-to person for training new coworkers on payroll processes due to her skill in methods of teaching. In 2012, Katie joined Letterle & Associates as a payroll administrator, but over the years has taken on other accounting responsibilities in addition to her payroll duties. Her primary responsibilities include all functions related to maintaining and processing employee payroll, ensuring payroll tax and 401k compliance and submission, reviewing employee timesheets for accuracy for both payroll and billing purposes, reviewing monthly client invoices prior to sending for payment, and most recently tracking and submission of milestone invoices and documentation for PA USTIF claims. When not at work, Katie enjoys spending time with her husband, children, and two cats. Her hobbies include card-making, arts & crafts, reading, and Zumba. She and her family also thoroughly enjoy vacationing in Walt Disney World.