OWTC and OFTC strive to provide our customers with the most accurate, precise and timely results possible. To achieve this, we stand by certain requirements on the samples being submitted.
Please be sure to review and follow the directions outlined in these forms. All forms are fillable PDFs.
LCF 3.1.1 is OWTCs Chain of Custody for water samples, typical drinking water tests look for coliforms and E. coli, this paperwork also allows you to select for more general bacterial test results, background growth and HPC counts, to understand the general bacterial load of the sample.
3.1.1 is the OWTC Chain of Custody – ver. 6 (2025-4-09)
LCF 3.1.4 is OWTCs Conduct Agreement, responsibilities and expectations of both clients and OWTC staff are outlined within to make testing samples as safe, efficient and transparent as possible. Should you require more specifics or a custom agreement please contact the OWTC prior to submitting samples.
3.1.4 is the OWTC Conduct Agreement – ver. 4 (2025-4-09)
LCF 3.1.5 is our Water Sample Requirements Letter which outlines how to properly take water samples for submission to OWTC. This letter is intended for samples meant for drinkability testing, which requires a bottle with a preservative, but also applies to those intending to test for chemical values.
3.1.5 is the Water Sample Requirements Letter – ver. 8 (2025-5-09)
LCF 3.1.5b is our Product or Swab Sampling Requirements Letter. This document outlines how to properly take and handle non-water samples for submission to OWTC. Page 1 explains handling and information needed for product samples and is very general since a “product” is the most general sample submission. Page 2 outlines how to swab an area for either quantitative testing using stick swab or qualitative/pathogen testing which use sponge swabs.
3.1.5b is the Product Swab Requirements Letter – ver. 12 (2025-4-09)
LCF 3.2.2 is the OWTC Chain of Custody for all products or swabs. Please note there are multiple options for some pathogens! If you are unsure of which option works for your needs please reach out to OWTC prior to taking samples, we will be happy to help you with how many grams of product, or number of swabs, you need to submit to get the testing you want.
3.2.2 is the OWTC Chain of Custody Product – ver. 013 (2025-8-22)
LCF 3.5.0 is our Shelf-Life chain of custody form for longer shelf-life studies, because these studies are typically looking for additional details, such as physical bloating over time, there are additional options compared to LCF 3.2.2. If you are planning a shelf life study please reach out to OWTC to ensure you testing requirements can be fully accomidated.
3.5.0 is a “SHELF-LIFE” requisition form
LCF 6.2 is our Customer Feedback Survey, we are always looking for ways to improve our service and invite anyone who wishes to submit feedback to fill out the survey and submit it to OWTC.
6.2 is a “CUSTOMER FEEDBACK SURVEY” for clients to complete – ver. 007 (2025-4-09)
LCF 15.0 is our Chain of Custody form for all cannabis containing products. Due to legal and logistical requirements the customer must fill in exactly what testing they require done and how much product or any type the submit, in grams. Please note we do not to THC testing on site and offer service in house for microbial testing of product only for quality assurance purposes. Please contact OWTC before submitting any samples containing cannabis.
15.0 is a “CANNABIS” requisition form