The hazardous waste crew, along with officials from the Contra Costa Environmental Health Department and the California Department of Fish and Wildlife began testing the water to determine what was causing the phenomenon.
French said officials found the agent in the water to be some sort of iron or oxide. It was determined that the levels did not pose a danger to humans or animals.
Both the county environmental health department and the Department of Fish and Wildlife are continuing to investigate how the substance got into the water, saying that possibly someone dumped it into the creek.
This story contains 177 words.
If you are a paid subscriber, check to make sure you have logged in. Otherwise our system cannot recognize you as having full free access to our site.
If you are a paid print subscriber and haven't yet set up an online account, click here to get your online account activated.