A notice of violation has been issued to the International Boundary and Water Commission regarding odors near the Tijuana River Valley, officials said Wednesday. The notice, issued Monday, was sent to the IBWC after the San Diego County Air Pollution Control District received around 150 complaints since July 21 regarding foul smells coming from the Hollister Wastewater Pump Station. When the district investigated the claims, it found the station — responsible for directing untreated transboundary water flow to the IBWC wastewater treatment plant — wasn’t properly maintained, officials said.