https://www.leppertassociates.com/projects daily 0.75 2025-09-14 https://www.leppertassociates.com/projects/project-one-78xfc monthly 0.5 2021-09-28 https://www.leppertassociates.com/projects/project-three-7dplz monthly 0.5 2021-09-28 https://www.leppertassociates.com/projects/project-two-kxz6s monthly 0.5 2021-09-28 https://www.leppertassociates.com/projects/project-four-6jeb2 monthly 0.5 2021-09-28 https://www.leppertassociates.com/home daily 1.0 2025-04-30 https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1634049303422-F1QKXDYOLJB2W0JHTUII/er.jpg Home - Environmental Remediation We can design remediation solutions as conventional as a pump and treat system, or as challenging as historic operations on a regional scale. https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1634049172743-NB7QXB8MA3SMG8NW9OCJ/feflow.png Home - Quantitative Hydrology We use cutting-edge modeling software to understand where water flows and what it carries with it. We can estimate the drawdown of a single well, or multiphase fate and transport, or anything in between. https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1634049263893-TVBBJQTZFXDPJX0I49HX/8_Img1Sm.jpg Home - Environmental Assessment From Phase I Assessments to understanding the nature and extent of known chemical releases, we can determine where contaminants are and what risk they pose. https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1634049352680-XV0PISKUB8W7E8YETYN2/coding.jpg Home - Software Solutions Our programmers specialize in data management and analysis packages that streamline sample collection, analysis, and reporting. We also specialize in model automation and optimization solutions. https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1634049329260-DKZ2QQG4GLDG3NHY1ALC/core.jpg Home - Resource Development Whether it's oil, groundwater, or minerals, we can handle the environmental, optimization, and regulatory aspects of resource development. https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1634141904271-D0OGLYMTBUYBWJQLIZ28/ASTI2.png Home https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1634142071345-NWOCML5ZLMG9W201FRHC/epa-removebg-preview.png Home https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1634055743663-RG57GEAY61MPSPYPLJIQ/logo.png Home https://www.leppertassociates.com/contact daily 0.75 2025-04-07 https://www.leppertassociates.com/about daily 0.75 2025-04-21 https://www.leppertassociates.com/services daily 0.75 2025-04-21 https://www.leppertassociates.com/services/resource-development daily 0.75 2021-10-07 https://www.leppertassociates.com/shawn daily 0.75 2025-04-30 https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1633800052734-X92MKLS8SBWO4O51O4KO/LeppertAssociatesHeadshotsFull-6.jpg Shawn - Shawn C. Leppert Principal Hydrologist As Principal Hydrogeologist, Mr. Leppert is responsible for identifying and applying practical hydraulic, hydrogeochemical, and geologic analysis methods for the characterization of subsurface environments. Mr. Leppert uses his considerable experience in assessing environmental impacts of contaminants found in soil and groundwater in the design of goal oriented subsurface investigative programs. He is involved in projects from “cradle to grave”. Using appropriate engineering principles, Mr. Leppert oversees the design, evaluation, and implementation of site-specific mitigating measures for contaminants of concern. He is accustomed to working in heavily scrutinized settings. Mr. Leppert is practiced at the communication of complex scientific and engineering analysis results using state of the art presentation techniques. Mr. Leppert has twenty-five of complex groundwater flow systems and the transport of contaminants within those systems. His experience includes the detailed evaluation of separate-phase contaminants, both Dense and Light Non-Aqueous Phase Liquids (such as fuels, solvents, and oils). Mr. Leppert is adept in developing remediation/control systems to address contaminated groundwater and the associated soil profile. His project experience includes design of detection monitoring systems, evaluation of remediation system effectiveness, remedial system design, and assessment of risk using fate and transport techniques. He is thoroughly versed in the use of state of the art computer simulators for a wide variety of subsurface environments. His computer programming skills as well as his background in defensible, statistically based uncertainty analysis provides added value to accomplishing investigation objectives both accurately and in a timely fashion. https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847857689-PNW750O9RV811BHKBC3B/image-asset.jpeg Shawn - Contact Information SLeppert@leppertassociates.com (303) 216-2428 1422 Washington Ave. Golden, CO 80401 https://www.leppertassociates.com/aaron daily 0.75 2021-10-09 https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847904871-IJY33BXSJQA0OIFROI1H/image-asset.jpeg Aaron - Aaron J Engers Hydrologist Aaron is a geoscientist with specific interests in hydrogeology, geological engineering, and numerical modeling. He has an MS degree in Hydrology at the Colorado School of Mines, building upon the BS degree in Geological Engineering that he earned there. As a technician for Leppert Associates, he has been involved in many aspects of site characterization, data analysis, and report preparation including field visits, statistical analyses, development of conceptual models for quantitative ecological risk assessments, technical writing, and figure generation. Aaron enjoys challenging and complex problem-solving and is passionate about learning new aspects of physical science, mathematics, and computer programming. Prior to pursuing a career as a hydrogeologist in the environmental consulting industry, Aaron gained 15 years of supervisory experience in a variety of positions that included an inspector and patrolman of a narrow-gauge railroad line in southwest Colorado, a rope-access technician for rooftop snow and ice removal on large commercial buildings, and the foreman for a landscaping company. https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847857689-PNW750O9RV811BHKBC3B/image-asset.jpeg Aaron - Contact Information AEngers@leppertassociates.com https://www.leppertassociates.com/staff daily 0.75 2025-06-12 https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1633635256890-7V6L14R00XS7VNCXLKO2/WorkProfilePic.jpg Staff https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1633635470555-RPPLZFZQO3Y8OGCZI6MU/LeppertAssociatesHeadshotsFull-6.jpg Staff https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1633969338339-619QYG1SQHUBG2DPM1C5/teig.jpg Staff https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/059887f2-4ab0-42ec-9443-802a2503ffd3/IMG_3146.jpeg Staff https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/7fa9324f-7800-43ae-a504-7b9a67edf0bf/WebsitePhoto.jpg Staff https://www.leppertassociates.com/cary daily 0.75 2021-10-09 https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1633801748743-APQWEF84CDXKIQDRT66M/WorkProfilePic.jpg Cary - Cary Leppert Principal Environmental Manager As a Principal for Leppert Associates, Mr. Leppert is responsible for a wide range of duties. Cary has 17 years of experience managing projects and is adept in the management of teams to achieve their defined goals. He has managed multi-million dollar projects located throughout the United States. He has strong leadership skills coupled with the analytical experience to complete the project on time and within budget. Mr. Leppert is proficient in the use of state-of-the-art graphical representation tools including Computer Aided Design (CAD) and Geographical Information System (GIS) software. He is also skilled at data management and database design. Cary has vast experience presenting complex analyses and scientific ideas to a non-technical and technical audience. Mr. Leppert, in addition to the above, has 15 years of experience as an IT manager and designs and maintains Leppert Associates online presence and marketing communications. https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847857689-PNW750O9RV811BHKBC3B/image-asset.jpeg Cary - Contact Information CLeppert@leppertassociates.com (303) 216-2428 1422 Washington Ave. Golden, CO https://www.leppertassociates.com/services/quantitative-hydrology daily 0.75 2025-04-21 https://www.leppertassociates.com/services/environmental-assessment daily 0.75 2021-10-19 https://www.leppertassociates.com/teig daily 0.75 2021-10-11 https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1633970703856-6TDLYHA0TRRXTPHHI61W/teig2.jpeg Teig - Teig Leppert Office Dog Teig Leppert is a professional hiker, kayaker, frisbee catcher, and model for Traildog Artisans Photography, who specializes in friendliness. He has hiked numerous Colorado fourteeners, and has even faced a mountain lion! At Leppert Associates, Teig plays an essential role in ensuring operations run smoothly around the office. He is an excellent office companion, and friend to everyone he meets. https://www.leppertassociates.com/services/software-solutions daily 0.75 2021-10-07 https://www.leppertassociates.com/pfas-forensics daily 0.75 2021-10-19 https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1633644595853-XH6S21J6NR0EGGTMVY27/Picture2.png PFASs Forensic Characterization Methodology - Make it stand out Perfluoroalkyl chemical formula diagram. https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1633632027994-8GLGAQF2J45DK0IV7BD8/Untitled.png PFASs Forensic Characterization Methodology - Make it stand out Team collecting groundwater samples for PFASs analyses. https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1633631759096-RZ1ENLCQAKNXVHAZSDQ0/PFASsSignatureGraphic.png PFASs Forensic Characterization Methodology - Make it stand out PFASs signature representing a landfill leachate sample. https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/1633632140206-WUPFND3AUHAXL2QC9GOL/PFASMarketing_v2.png PFASs Forensic Characterization Methodology - Make it stand out Distribution of PFASs signatures representing environmental media samples. https://www.leppertassociates.com/services/environmental-remediation daily 0.75 2021-10-07 https://www.leppertassociates.com/jerald daily 0.75 2025-04-09 https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/2939ee0d-c91e-4bbd-a729-d44e1d8d2708/LepLogotest.jpg Jerald - Jerald Dorsey Geophysicist Accomplished geophysicist with over two decades of experience in subsurface imaging, earth model building, and geophysical data analysis. Extensive expertise in managing large datasets, seismic tomography, and near-surface modeling to deliver high-resolution geological models. Proven ability to collaborate cross-functionally, lead technical teams, and develop innovative workflows to improve exploration accuracy and resource assessments. Adept at managing projects from inception to delivery, ensuring quality, precision, and client satisfaction. https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847857689-PNW750O9RV811BHKBC3B/image-asset.jpeg Jerald - Contact Information JDorsey@leppertassociates.com (303) 216-2428 776 E. Second Avenue Durango, CO 81301 https://www.leppertassociates.com/danika daily 0.75 2025-06-12 https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/65396042-7cb5-4aa7-b79a-97c0977db039/IMG_3146.jpeg Danika - Danika Leon Environmental Scientist As an environmental scientist for Leppert Associates, Ms. Leon is responsible for a wide range of duties. Danika graduated with a degree in Environmental and Sustainability Studies from Northern Arizona University. Through her employment with Leppert Associates she has become proficient in several skills related to data management and utilization. Ms. Leon is proficient in the use of geographical representation tools including Geographical Information System (GIS) and Computer Aided Design (CAD) software. She is skilled in SQL database management and applying statistical methods for analysis. Danika creates graphical presentations of data, has skills in programming software such as Python and assists in web design for Leppert Associates. She is also proficient in Microsoft Office applications including Word, Excel, Access, and PowerPoint. Danika utilizes these skills to assist in the regulatory groundwater monitoring programs of hazardous waste facilities spanning across the country. https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847857689-PNW750O9RV811BHKBC3B/image-asset.jpeg Danika - Contact Information DLeon@leppertassociates.com (303) 216-2428 776 E. Second Avenue Durango, CO 81301 https://www.leppertassociates.com/helen daily 0.75 2025-04-30 https://images.squarespace-cdn.com/content/v1/614f354be491d90282b68435/b0dcdd3b-f281-4839-ac48-482adc4fc11d/WebsitePhoto.jpg Helen - Helen Correll Environmental Scientist As an Environmental Scientist, Ms. Correll is responsible for managing and supporting long-term regulatory groundwater monitoring programs for hazardous waste facilities across the United States. She earned an M.S. in Applied Chemistry from the Colorado School of Mines, where she conducted research at the National Renewable Energy Laboratory (NREL). Helen also holds a B.S. in Biochemistry and Molecular Biology from Penn State University, with a minor in Statistics. Her work has spanned from characterizing CO₂ capture materials to managing complex hazardous waste site projects. Through her role at Leppert Associates, Ms. Correll has developed advanced skills in environmental data analysis, regulatory reporting, and technical communication. She is proficient in using Python for statistical evaluations, PostgreSQL for database management, and QGIS for geospatial data representation. Her work includes preparing regulatory compliance reports, creating clear and accurate data visualizations, and ensuring alignment with federal regulations including the Resource Conservation and Recovery Act (RCRA) and the Toxic Substances Control Act (TSCA). Prior to entering the environmental consulting industry, she developed leadership experience in conservation fieldwork and education through service roles in remote backcountry settings and underserved communities. https://images.squarespace-cdn.com/content/v1/5ec321c2af33de48734cc929/1589847857689-PNW750O9RV811BHKBC3B/image-asset.jpeg Helen - Contact Information HCorrell@leppertassociates.com (303) 216-2428 776 E. Second Avenue Durango, CO 81301 https://www.leppertassociates.com/ecims daily 0.75 2025-09-14