True Northwest Inc. offers all state mandated I-502 Quality Assurance Testing to Producers and Processors in the State of Washington. We support our clients with customized services like Grow Checks, Wastewater Consultations, Environmental Monitoring, and a range of Additional Analytical Testing. Accuracy Matters We understand the importance of testing methods that are accurate and consistent. Clients can rest assured knowing that quality data is one of our top priorities. We hold ourselves to the same standards of our parent lab, Libby Environmental, that has over a decade of experience performing analytical chemistry and is accredited by the Washington State Department of Ecology. That's why we perform quarterly proficiency and daily standards testing to ensure the results our laboratory delivers are true.