WORCESTER - The state Department of Public Health has issued a cease-and-desist and quarantine order to the first medical marijuana dispensary to open in Worcester, while it looks into "concerns about the use of pesticides" at the facility's cultivation operation in Bellingham.

Good Chemistry of Massachusetts, located at 9 Harrison St., was given the order Friday after a DPH inspection that determined marijuana cultivated and prepared by Good Chemistry could pose "an immediate or serious threat to the public’s health, safety or welfare."

On Tuesday, there was a sign at the Good Chemistry of Massachusetts storefront in the Canal District that read, “Sorry, we’re temporarily closed while we work through some operational issues. Sorry for the inconvenience! Working to get back open full-time soon!”

Good Chemistry of Massachusetts spokesman Dominic Slowey of Slowey/McManus Communications, after two days of inquiries from the Telegram & Gazette, released a statement saying the Worcester location was closed for several days at the request of state regulators while they reviewed “several of the innovative organic gardening practices” at the cultivation facility in Bellingham.

“Operations at our cultivation facility were not placed on hold, and our experienced garden team continues to grow the highest quality cannabis to be made available for medical card holders," the statement reads. "Until the state completes its review, we will be providing patients a full range of cannabis products from state-licensed cultivators from across the state.”

The statement says the Good Chemistry is working very hard to advance and innovate “industry best practices,” including USDA-certified organic cultivation techniques that are approved for use in cannabis cultivation in Colorado, Nevada, Washington and Oregon but “are new to Massachusetts.”

On Wednesday, the state amended the cease-and-desist order to allow Good Chemistry to sell marijuana and marijuana-infused products from other registered dispensaries.

The DPH said it has referred the matter to the state Department of Agricultural Resources, the state agency responsible for pesticide enforcement and regulation.

Good Chemistry of Massachusetts began sales at its Worcester location July 12 and officially opened Aug. 1. It has applied for a special permit from the city of Worcester so it can also sell recreational marijuana at 9 Harrison St. The company has also signed a community host agreement with the city so it can co-locate its medical and adult-use marijuana sales at the same site.

Currently, there are 38 registered marijuana dispensaries approved for sales across Massachusetts, serving more than 54,000 patients and over 6,400 personal caregivers, according to the DPH.