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Field Resources Download necessary forms here! **ALL SAMPLES MUST HAVE A COC ATTACHED*** 1 Laboratory Field Guide 2021 This is a resource that outlines all of our tests, shipping requirements, how to fill out the COC, and specific sampling/bottling requirements for each test and matrix. DOWNLOAD PDF 2 Waste Water Chain of Custody Use this form for BOD, TSS, pH, Fecal Coliform, Chloride, Nitrate + Nitrite, Phosphorous, Ammonia Nitrogen, TKN, and Lab Filtration Tests. DOWNLOAD PDF 3 UST Chain of Custody Use this form for DRO, GRO, GRO/PVOC, Lead, Cadmium, VOC 8260, PAH, and % Solids. DOWNLOAD PDF 4 Blank Chain of Custody Use this form for any other testing not mentioned above. DOWNLOAD PDF 5 Terms & Conditions The Terms and Conditions can also be found on the back of all COC forms. DOWNLOAD PDF Let's Work Together Questions? Contact a Project Manager at 608-356-2760 or via email at information@ctlaboratories.com .

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

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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 Wet Chemistry / Microbiology Analyst See full job description here . ​ 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. ​

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