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Drinking and Waste Water Testing We work with our clients to make fulfilling your regulatory testing requirements as easy as possible, based around your sampling schedule. Each of our clients receive a dedicated supply of coolers stocked with the appropriate certified, precleaned sample containers, chain of custody forms, and sample labels. Analytical results are reported in regulatory-required formats and provided via email or as a hardcopy. Turnaround times are adjusted for end-of-reporting period samples to ensure our clients receive their results in time to meet their compliance reporting deadlines. Typical Testing Procedures Drinking Water - Inorganics Cyanide - EPA 335.4 Fluoride - EPA 300.0 Nitrate - EPA 300.0 Nitrite - EPA 300.0 Sulfate - EPA 300.0 Drinking Water - Volatile Organic Compounds VOCs - EPA 524.2 Waste-Water and Sludge BOD, Ammonia, TKN, Phenolics Anions, Oil & Grease, Cyanide Total / Fecal Coliform Total Phosphorus, Water Extractable Phosphorus Metals, Total Recoverable Metals Pesticides, PCBs Total Suspended Solids, Total Volatile Solids Drinking Water - Inorganics (Metals) Antimony - EPA 200.9 Arsenic - EPA 200.9 Barium - EPA 200.7 Beryllium - EPA 200.7 Cadmium - EPA 200.7 Chromium - EPA 200.7 Copper - EPA 200.7 Lead - EPA 200.9 Mercury - EPA 245.2 Nickel - EPA 200.7 Selenium - EPA 200.9 Sodium - EPA 200.7 Thallium - EPA 200.9 Clients & Reporting We provide analytical results in regulatory-required formats and adjusts sample turnaround time to ensure on-time compliance reporting . All of our routine waste-water clients receive a dedicated sample bottle and cooler supply. As each set of samples arrives at the laboratory, the cooler is repacked with the appropriate sample bottles and delivered back to the client the next day. We Test Private Wells! Click here for more information. "We have a long standing working relationship with CT Labs and look forward working with them for long into the future." Satisfied client for 30+ years

General Chemistry At CT Laboratories, our General Chemistry (or wet-chem) department is one of our busiest. We employ experienced chemists that are well versed in the methods that they are responsible for. There are many short hold time analyses in this department. Our staff works around a detailed time management schedule to make sure all results are generated accurately and efficiently. Please see our sample receiving hours Alkalinity (carbonate, bicarbonate) Method EPA 310.2 SM 2320B Matrices Water BOD - 5 Day (total, soluble, carbonaceous) Method SM 5210B Matrices Water Cyanide (reactive) Method SW-846 Ch. 7.3 Matrices Water, Solid Hardness Method EPA 6010C SM 2340B Matrices Water Nitrogen, Organic Total Method EPA 350.1 EPA 351.2 Matrices Water, Solid Oil & Grease - HEM (with SGT) Method EPA 1664A Matrices Water Phosphorus Method EPA 365.1 EPA 365.4 Matrices Water, Solid Solids, Settleable Method SM 2540F Matrices Water Solids, Percent Method EPA 8000C SM 2540G Matrices Solid Solids, Volatile Suspended Method EPA 160.2 EPA 160.4 SM 2540D Matrices Water Sulfide, Reactive Method ASTM D4978 Matrices Water, Soil Ammonia Nitrogen Method EPA 350.1 SM4500-NH3H Matrices Water, Solid COD Method EPA 410.4 EPA 5220D Matrices Water Flashpoint Method EPA 1010A Matrices Water, Solid Hexavalent Chromium Method EPA 7196A Matrices Water Nitrogen, Total Method EPA 351.2 EPA 300.0 EPA 9056A Matrices Water, Solid Organic Carbon, Total Method EPA 415.1 EPA 9060A Lloyd Kahn Matrices Water, Solid Phosphate Method EPA 9056A Matrices Solid Solids, Total Dissolved Method EPA 160.1 SM 2540C Matrices Water Solids, Total Suspended Method SM 2540D Matrices Water Specific Gravity Method SM 2710F Matrices Water, Solid Anions (bromide, chloride, fluoride, nitrate, nitrite, ortho-phosphate, sulfate) Method EPA 300.0 EPA 9056A SM 4110B Matrices Water, Solid Cyanide (total) Method EPA 335.4 EPA 9012B Matrices Water Free Liquids Method EPA 9095B Matrices Solid Nitrate + Nitrite Method EPA 353.2 Matrices Water, Solid Nitrogen, Total Kjeldahl Method EPA 351.2 Matrices Water, Solid pH Method EPA 150.2 EPA 9040C EPA 9041A SM 4500H+B EPA 9045D Matrices Water, Solid Residue, Total Method SM 2540C Matrices Water Solids, Total Method SM 2540B Matrices Water Solids, Total Volatile Method EPA 160.4 SM 2540D Matrices Water, Solid Sulfide, Total Method EPA 376.1 EPA 9034 Matrices Water Back to Testing Services

CT Laboratories is an Environmental Testing Laboratory in Baraboo, WI. We work with individual homeowners, businesses, and cleanup efforts at the local, state, and federal level. Visit our site for a complete suite of our testing services and to find an experienced Project Manager. ABOUT About what makes CT Laboratories different... Experience cannot be overlooked. CT Laboratories LLC has been in business since 1987. We are located in the heart of the Baraboo Bluffs in Baraboo, WI. The lab was started back in the eighties as an off-shoot of the engineering firm Mid-States Associates. Today, we are locally owned and continue to grow. We are always increasing our capabilities and the locations we serve. CT Laboratories' staff is comprised of dedicated, long-term employees. Key personnel, including our Laboratory Director, Project Managers, Group Leaders and Senior Analysts have an average tenure of over 12 years with the company. We also understand that communication is the key to a successful project. Our clients are assigned a specific project manager to take care of their needs from initial project scoping and assistance with QAPP generation, to fulfilling bottle requests and verifying sample receipt through addressing technical issues and final report generation. Quality is not a given or an afterthought at CT Laboratories. Our quality assurance program is designed to ensure legally defensible data. From numerous performance evaluation studies, NELAP and other individual State audits, as well as our in-house program, we continually monitor our quality to ensure our clients get the best results possible. Markets Served Project Managers Quality Assurance OUR TEAM As a Small Business, many of our personnel take on more than one responsibility. We are extremely proud of our team and the expertise they bring to the laboratory. CERESS BERWANGER President & Owner Pan American Business School, 1977 Time at CT Laboratories: 22 years Ms. Berwanger has over 35 years of experience in the environmental laboratory industry, in a variety of financial, technical, regulatory, marketing, project management, sales and managerial positions. Her expertise includes a thorough knowledge of Federal contracting requirements and business management aspects of the laboratory. Learn more about our Woman-Owned Small Business Designation: Woman Owned Brett Szymanski Laboratory Director / Project Manager BA in Management & Human Resources Time at CT Laboratories: 17 years Areas of Expertise: Oversight of operations, strategic planning, monitoring QA/QC issues, personnel and workload allocations. Project Management for Department of Defense , EPA , and other high-profile projects nationwide. Organics Analysis on GC/MS. Field Sampling Consultant. Dennis Linley Business Development / Marketing BS in Wildlife Biology Time at CT Laboratories: 29 years Areas of Expertise: Sales & Marketing Specialty Testing Contract Development Project Management Client Relationships Sample Receiving & Processing Reporting Heidi Beckel Wet Chemistry & Microbiology Group Leader BS in Microbiology Time at CT Laboratories: 6 years Areas of Expertise: Microbiology sample preparation and analysis. Wet Chemistry sample preparation and analysis. Troubleshooting and optimizing instrumentation. Team management & leadership. David Berwanger VP of Operations / Information Systems Manager AS/BS in Chemistry Time at CT Laboratories: 26 years Areas of Expertise: Analytical laboratory instrumentation. Productivity/cost consulting. Environmental laboratory management. Laboratory network and instrumentation software. Jodi Serstad Project Manager Time at CT Laboratories: 23 years Areas of Expertise DNR Waste Water and Drinking Water Compliance. Local Municipalities Testing Needs - Water Treatment Plants Shipping and Receiving Hazardous Waste Disposal Independent Well Water Testing Sample Receiving and Facilities Management Field Resources Adam Zurfluh Semivolatiles & Extractions Group Leader BS in Wildlife Biology Time at CT Laboratories: 12 years Areas of Expertise: Semivolatile Organics Analysis including PCBs, Pesticides, and Explosives. Extraction of Semivolatile Organic Compounds from difficult matrices. Instrumentation & Maintenance - GC and HPLC Team management & leadership Rebecca Duranceau Quality Assurance Manager / Technical Director BS/MS in Chemistry/Medicinal Chemistry Time at CT Laboratories: 19 years Areas of Expertise: Quality Assurance & Accreditations HPLC Analysis - PAHs and Explosives Organics Analysis on GC, GC/MS LC/MS/MS Genotyping See research profile here Erik Catherman Sample Receiving / Facilities Manager Time at CT Laboratories: 5 years Areas of Expertise: Shipping and Receiving Hazardous Waste Disposal Sample Receiving and Facilities Management Client Relationships Sample Processing and disbursement to laboratory personnel Debbie Watts Administrative Assistant Time at CT Laboratories: 18 years Areas of Expertise: Accounts Receivable Human Resources / Payroll Client Relationships Create and Maintain Physical and Electronic Filing Systems Eric Korthals Senior Project Manager / Deputy Technical Director BS/MS in Aquatic Biology/Chemistry Time at CT Laboratories: 34 years Areas of Expertise: Project Management in all areas of CT Laboratories involvement. Laboratory Information Management Systems (LIMS) administration and development. Electronic Data Deliverables (EDDs) development and generation. Randy Digmann Volatiles & Metals Group Leader BS in Water Chemistry Time at CT Laboratories: 35 years Areas of Expertise: Volatile Organic Compounds analysis. Metals analysis. Instrumentation & Maintenance - GC/MS and GC. Team management & leadership

About CT Laboratories LLC is a full-service environmental laboratory located in Baraboo, WI with over 25 years of experience providing analytical testing services to a wide range of Federal and commercial projects nationwide. The company is classified as a woman owned small business under NAICS Code 541380, Testing Laboratories. Additionally, over half of our staff and analysts are women. Learn more about CT Laboratories here. Salary and Benefits: Starting salary is commensurate with experience. Holiday pay and Paid Time Off (PTO) Health & Dental Insurance Health Reimbursement Arrangement (HRA) Flexible Spending Account (FSA) Opportunities for over-time pay 401(k) Current Job Postings If no jobs are currently posted, you may still submit an application. We keep all resumes on file for 6 months in the event that a position opens. How to Apply Send the following in an email to information@ctlaboratories.com . The Subject of your email should be in the following format: "Application - Last, First" Resume / CV Cover Letter Reference(s) Note: If you have not heard back from a representative within 7 business days, please contact 608-356-2760 and ask for Brett. We routinely check our spam folders, but do not catch everything. All resumes are kept on file for 6 months after they have been received.

Project Managers are always here to answer questions. Call us at 608-356-2760 or email us at information@ctlaboratories.com. Say Hello We would love to hear from you. Feel free to reach out at any time with questions, comments, or requests. Phone Email 608-356-2760 information@ctlaboratories.com Social Media First Name Last Name Email Message Send Thanks for submitting! Visit Us Are you dropping off samples or need questions answered in person? Call ahead so we can schedule a time to meet with you. Address 1230 Lange Court Baraboo, Wisconsin 53913 608.356.2760 Opening Hours Mon - Fri Saturday Sunday 8:00 am - 5:00 pm Closed Closed Holidays & Sample Receiving Hours

Private Well Water Testing CT Laboratories does not have specific testing bundles because we believe each home owner/client has different needs. We build test kits and adjust pricing accordingly . Our Project Manager, Jodi Serstad , has over 20 years of experience at CT Laboratories determining individual testing needs. Her expertise extends beyond State Drinking Water requirements, and she works with local municipalities, businesses, and individuals on a daily basis. Whether you're an individual home owner, a plumber, or contractor, she can guide you to determine what testing would suit your needs the best. Find her contact information here . Identify your water's symptoms: Go to DNR

Department of Defense Services CT Laboratories is a WOSB providing analytical support to hundreds of DoD projects nationwide. The laboratory is DoD ELAP accredited in compliance with the DoD Quality Systems Manual (QSM). We hold current analytical services contracts with USACE Louisville, Omaha and Baltimore Districts and perform numerous methods in support of DoD projects, such as 8330B explosives, nitroguanidine and nitrocellulose and chemical warfare degradation products. Testing Services United States DoD Branches Served Coast Guard Projects 12-State Due Diligence Lead Survey Ft. Myers, FL Lake Michigan Facilities – MI Lake Michigan Facilities – WI CGC Yorktown, VA CGC Ouachita, TN District 9 Dredging Projects USACE/ACM Projects Aberdeen Proving Ground, MD Redstone Arsenal, AL Pueblo Chemical Depot, CO Chicago District - Sediment/Elutriate Badger AAP, WI Ft. Leonard Wood, MO Savanna Army Depot, IL Baltimore District - Ft. Belvoir Support Kansas AAP, KS Ft. Meade/Tipton Airfield, MD Ravenna AAP, OH St. Paul District - Mississippi River Sediment Ft. Wingate, NM Iowa AAP, IA Ft. Hamilton, NY Omaha District - Lincoln Atlas Missile Sites Jefferson Proving Ground, IN Ft. Polk, LA Camp Reynolds, PA KC District – MO, KS, IA Water Quality Kinchloe AFB, MI Anniston AAP, AL Picatinny Arsenal, NJ Louisville District – MI FUDs Radford AAP, VA Navy Projects Naval Weapons Station Yorktown, VA Philadelphia Naval Shipyard, PA Reserve Center La Crosse, WI NSWC Indian Head, MD Craney Island Naval Reservation, VA Former NOS Forest Park, IL NAS JRB Willow Grove, PA Former Nansemond Ordnance Depot, VA Thurmont Navy Support Facility, MD NAS JRB New Orleans, LA JEB Little Creek, VA National Guard Projects ANG SE facilities: MS / AL / FL MT / ID ANG facilities General Mitchell, WI Selfridge ANG, MI 178th Fighter Wing, OH 177th Fighter Wing, NJ Twin Cities ANG, MN Volk Field CRTC, WI Alpena ANG, MI Sioux City ANG, IA Hulman Regional ANG, IN Truax Field, WI Air Force/AFCEE Projects Nationwide Soil Survey (42 AFBs) King Salmon, AK Seymour Johnson AFB, NC Tinker AFB, OK Tyndall AFB, FL McGuire AFB, NJ Wright-Patterson AFB, OH McConnell AFB, KS Kunsan AFB, Korea Grand Forks AFB, ND FE Warren AFB, WY England AFB, LA

Our Project Managers. CT Laboratories firmly believes that communication is the key to every successful project. We will assign an experienced chemist as a dedicated Project Manager to handle all your needs. They can provide information for inclusion in your QAPP and can meet with you up front to discuss the project, making sure all questions and scenarios are discussed before the work arrives. Your PM will input your project-specific requirements (special compounds, reporting limits, action levels or report formats) into our LIMS. When the work arrives at the lab, you will be notified that the samples arrived safely and of their condition. Any problems, you will be notified immediately. After your reports have been sent, the project manager will be there to discuss the data with you. Learn more about Reporting and Electronic Data Deliverables here . Dennis Linley Business Development Sales & Marketing BS in Wildlife Biology Time at CT Laboratories: 29 years Areas of Expertise: Sales & Marketing Project Management Client Relationships Sample Receiving & Processing Reporting contact: dlinley@CTLaboratories.com 608.963.4964 Eric Korthals Senior Project Manager BS/MS in Aquatic Biology/Chemistry Time at CT Laboratories: 34 years Areas of Expertise: Project Management in all areas of CT Laboratories involvement. Laboratory Information Management Systems (LIMS) administration and development. Electronic Data Deliverables (EDDs) development and generation. Report development and customization. Inorganic chemistry and microbiology Contact: EKorthals@ctlaboratories.com Jodi Serstad Project Manager Time at CT Laboratories: 23 years Areas of Expertise DNR Waste Water and Drinking Water Compliance. Local Municipalities Testing Needs - Water Treatment Plants Shipping and Receiving Hazardous Waste Disposal Independent Well Water Testing Sample Receiving and Facilities Management Contact: JSerstad@ctlaboratories.com Brett Szymanski Project Manager / Laboratory Director BA in Management & Human Resources Time at CT Laboratories: 17 years Areas of Expertise: Oversight of operations, strategic planning, monitoring QA/QC issues, personnel and workload allocations. Project Management for Department of Defense , EPA/ Brownfields/ Superfunds , and other high-profile projects nationwide. Organics Analysis on GC/MS. Field Sampling Consultant. Contact: BSzymanski@ctlaboratories.com Email information@ctlaboratories.com Call 608-356-2760 Follow

Landfills CT Laboratories LLC has over 30 years of experience providing analytical support for landfills in Wisconsin and nationwide, including groundwater monitoring, leachate and compost/biopile testing. Specialty services include low level VOC analyses (Vinyl Chloride down to 0.02 ppb) and custom trend and exceedance reports. WE DO TCLP, SPLP, and ASTM LEACHATES! We serve all types of landfills Major Commercial Solid / Hazardous Waste Landfills Multiple National / Regional Companies Commercial Landfill Recycling / Recovery Companies Construction & Demolition Landfills Municipal Landfills City of Adams Landfill Boscobel Landfill Monroe County Landfill Dane County Landfill Sauk County Landfill West Allis Landfill Columbia County Landfill Juneau County Landfill Federal Oxford Federal Landfill Active Military Installations Ft. McCoy Former DoD Facility Landfills Badger AAP Landfill Pueblo Depot Landfill / Roll-Offs Lockbourne AFB Landfill Anniston AAD C&D Landfill Fort Custer Dump Site 500 Landfill sites in Wisconsin currently require active monitoring. Let us help you meet your regulatory needs!

TESTING SERVICES CT Laboratories LLC offers a comprehensive range of environmental testing services. The matrices we test include: surface water, ground water, drinking water, soil, sludge, sediment, elutriate, and other wastes. Contact us today to learn more about our capabilities and pricing. We do a lot, but we can't do it all. To provide the most comprehensive range of analytical services possible, we have established relationships with several large business laboratory networks and specialty laboratories. We work closely with these carefully chosen partners to provide our clients with consistent turnaround, high quality analytical results and compatibility in data deliverables. We maintain a register of each qualified subcontract laboratory, including their current DoD ELAP and NELAP accreditation scopes. We provide test kits for private wells. View more information here . Organic Analyses CT Laboratories has two teams dedicated to the analysis of Volatile and Semi-Volatile Organic Compounds using GC, GC-MS, and HPLC Technologies to meet your low-level needs. View More Metals CT Laboratories has extensive experience in metal analyses. We maintain ICP, Flame and Furnace AA capabilities. This means we can offer you low detection limits to meet the needs of your project. View More General Chemistry At CT Laboratories, our General Chemistry (or wet-chem) department is one of our busiest. We employ experienced chemists that are well versed in the methods that they are responsible for. There are many short hold time analyses in this department. Our staff works around a detailed time management schedule to make sure all results are generated accurately and efficiently. View More Biological Testing CT Laboratories offers a wide range of biological testing services. We also offer specialty services like Microcystin analyses, Heterotrophic plate counts, and Algal species composition. Our chemists are experienced, and can handle large volumes of samples throughout the busy testing seasons of the year. View More Physical & Geotechnical CT Laboratories has been expanding into Geo Technical and Physical testing for the past several years. We have grown from sieve and grain size analyses to complex grinding and homogenization of soil for multi-incremental sampling projects. View More Specialty Testing In addition to our routine analytical capabilities, CT Laboratories LLC offers specialty testing services and can help develop new procedures to suit your needs. View More

Surface Water & Sediments CT Laboratories LLC has extensive experience analyzing surface water, pore water, sediments and elutriates in support of multiple USACE Districts, US EPA, State and local government agency projects. Our Projects Surface Water Projects Seasonal Lakes Monitoring - USACE Kansas City District Seasonal Lakes Monitoring - USACE Louisville District TMDL Watershed Monitoring Sediment Testing Projects Mississippi and Missouri Rivers - USACE St. Paul District Waukegan Harbor, IL - USACE Chicago District Gruber's Grove Bay Dredging Typical Testing Procedures Elutriate Generation Including Standard Elutriate, Modified Elutriate, Effluent Elutriate, and State Specific Modifications Surface Water Testing Chlorophyll A, Microcystin, Pesticides, Anions, TOC/DOC, Ammonia (TKN), Metlas, TDS/TSS/TVS, BOD/COD, Phytoplankton, PAH, Cyanide, DRO/GRO, Total/ortho-phosphorus Sediment Testing Grain Size, Atterberg Limits, Specific Gravity, Bulk Density, Phosphorus, Cyanide, TOC, Organics, Pesticides, DRO/GRO, PCBs, PAH, Hexavalent Chromium See all Testing Services

Sample Receiving Hours Standard Samples: Monday - Friday: 8:00 am - 5:00 pm Saturdays: Requires prior notification and approval from Project Management Total and Fecal COLIFORM Samples: Monday - Thursday: 8:00 am - 5:00 pm Friday: 8:00 am - Noon Nitrate and BOD Samples: Monday - Thursday: 8:00 am - 5:00 pm Friday: 8:00 am - 2:00 pm Holidays & Closures (2025) New Year's Day (2025): Wednesday, January 1st Closed Martin Luther King Jr Day: Monday, January 20th Open President's Day: Monday, February 17th Open Memorial Day: Monday, May 26th Closed Juneteenth: Thursday, June 19th Open Independence Day: Friday, July 4th Closed Labor Day: Monday, September 1st Closed Indigenous People's Day (also observed as Columbus Day): Monday, October 13th Open Veteran's Day: Tuesday, November 11th Open Thanksgiving: Thursday, November 27th Closed Thursday & Friday Christmas Day: Thursday, December 25th Closed Thursday & Friday New Year's Day (2026): Thursday, January 1st Closed