Chemist Tommie Griffin, left, and chemist and owner of Coastal Analytical, Samuel David, look at liquified marijuana at the lab in Vista.

Chemist Tommie Griffin, left, and chemist and owner of Coastal Analytical, Samuel David, look at liquified marijuana at the lab in Vista. Photo by Jamie Scott Lytle.

— In a sprawling industrial park just outside of Vista, inconspicuously tucked in a tan, nondescript building is Coastal Analytical, one of San Diego County’s few marijuana testing facilities...

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