PLACER COUNTY (CBS13) — An illegal marijuana grow at a rural property in Placer County has been raided by authorities.

The Placer County Sheriff’s office says, back on Aug. 5, deputies with their Special Operations Unit served a search warrant at a marijuana grow site in Alta. The site was on a hillside leading directly into the North Fork of the American River, deputies say.

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At the site, about 2,400 marijuana plants, 400 recently harvested pot plants, and about 200 pounds of processed marijuana was found.

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Deputies also discovered a “considerable” amount of chemicals around the property. With the grow site being on a hill, the sheriff’s office says it would have been inevitable for some chemicals to wash down when it rains and pollute the river.

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Several suspects who were maintaining the site were found living in tents at the property, deputies say. In total, six people – all from out of the area – were arrested in connection to the grow: 30-year-old Jose Checo, 22-year-old Humberto Chomo, 38-year-old Cerillo Delacruz, 23-year-old Onorio Delacruz, 25-year-old Meliton Hernandez-Velasco and 19-year-old Adrian Regino. All are facing numerous drug charges.