An investigation by the California Department of Fish and Wildlife (CDFW) and the Ventura County District Attorney’s Office has determined that a petroleum-contaminated wastewater discharge into Grimes Canyon Creek originated from a vacuum truck operated by a temporary employee of Advanced Industrial Services, Inc. (AIS).
Evidence showed that between 4:00 a.m. and 4:49 a.m., the driver loaded petroleum-contaminated wastewater, backed the truck up to Grimes Canyon Creek, and discharged approximately 150 gallons into a ravine leading to the creek bed. The driver then left without reporting the spill, as required by law.