Welcome to Pacific Agricultural Laboratory, A Matrix Sciences Company

The complexity of pesticide, herbicide and fungicide analysis is increasing with multiple regulations around the world. Additionally, there are unique challenges and concerns with specific matrices and defensible Limits of Quantitation (LOQ).

Pacific Agricultural Laboratory (PAL), a Matrix Sciences Company, brings together the expertise, tools and support to partner with you to obtain the information you need to make informed decisions with confidence.

Our residue laboratory in Sherwood, Oregon analyzes your samples to the highest quality standards, with integrity and decades of experience. At PAL, we strive to communicate with care and concern for your business.

Our Enabling Principles


We deliver accurate, timely and insightful information so our customers have what they need to bring safe, quality food to market.


Our customers (and their consumers) depend on our honesty, and we deliver it with unflinching resolve.


We listen to, we hear and we understand our customers.

Defensible Detection Limits

The Limits of Quantitation (LOQ) on our Certificates of Analyses are not only numbers; they are validated against the appropriate commodities to ensure your results are fully defensible. Our belief in operating with the highest levels of integrity and communication is behind those reporting limits, and it is the reason you can have confidence in your testing.

Matrix Sciences Expands Service Offering and Acquires PAL Residue Testing Laboratory

Matrix Sciences has added significant, new capabilities to its roster of client services with the acquisition of Pacific Agricultural Laboratory (PAL), a state-of-the art facility in Portland Oregon that provides pesticide residue testing of fruits and vegetables.

Matrix Sciences CEO Robert Wiebe said the acquisition of PAL represents a big step forward in the Matrix vision to build a full-service network for customers.

“PAL is truly one of the few laboratories in the country with such an unparalled level of expertise in the highly-specialized field of residue testing,” Wiebe said. “That expertise combined with an impressive dedication to meeting the needs of customers is recognized throughout the Pacific Northwest, across the country and even internationally and we are thrilled to welcome PAL to the Matrix network of businesses.”

PAL’s Founder and Laboratory Director, Steve Thun says he is optimistic about the future of the company under the Matrix banner.

“I genuinely look forward to being a part of Matrix Sciences, which will give us the ability to expand these vitally important services into other parts of the country,” Thun said. “Matrix and PAL share a commitment to help our customers bring safe, quality food to market through analytical excellence and customer service.”