Streets manager Joe Rosenlund says they don't know who is responsible, but he believes it came from a large truck that may have been hauling cement or another kind of sludge or materials from a building demolition site.
Anyone with any information is urged to contact the Yakima Police Department at 575-6200, Union Gap Police at 248-0430 or Tips can be also be reported to Yakima County Crime Stoppers by phone at 1-800-248-9980.
The patient had recently returned from Wuhan City China. That's the only known case in Washington State. While other tests are pending no other cases have been identified and no cases or suspected cases of the virus have been found in Yakima County.