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STATE OF CALIFORNIA DEPARTMENT OF CALIFORNIA HIGHWAY PATROL HAZARDOUS MATERIALS INCIDENT REPORT CHP 407E Page 3 SEOUENCE OF EVENTS: On February 21, 2018, at approximately 0415 hours, a 2015 Freight tractor was pulling a tanker trailer loaded with Hypo Chlorite Solution. The tractor was southbound on Byron Road as it slowed for the red signal light at the intersection of Mountain House Parkway. As it slowed approximately 180 pounds of Hypo Chlorite Solution,which was stored in the tanker, spilled out the dome area on top and onto the roadway beneath. A citizen observed the spill and informed the driver. The driver stopped, secured the dome and drove back to his yard. The spill was called in later by another private citizen. Officers Skinner, ID 19012, and Roesler, ID 19532, responded to the scene along with Mountain House Fire Department. The spill was contained on the roadway and the roadway was closed in both directions. Officer Skinned assumed incident command until he was relieved by Sergeant Lecce, ID 15236. The responsible party did not report the incident to the local authorities. The citizen who originally informed the driver of the spill, reported it to the California Highway Patrol (CHP) after he observed the road closure. A subsequent investigation by the trucking company revealed the dome on top of the tanker was not properly secured before it left the yard in Pittsburg, California. The material was determined to be Hypo Chlorite Solution by Richard Doss of Hasa Incorporated. A hazardous clean-up crew from Hasa Incorporated responded to the scene to remove and dispose of the material. The scene was declared safe at 1000 hours ROAD CLOSURES: Byron Road was closed for approximately 5 hours. EVACUATION DETAILS: None required. ENVIRONMENTAL IMPACT: Approximately 180 pounds of Hypo Chlorite Solution was spilled on the roadway. The containment area was approximately 100 feet in circumference CLEAN UP ACTIONS: Hasa Incorporated, a State Licensed Hazardous Waste Disposal Company, conducted the hazardous material clean-up. The material was covered with absorbent. The contaminated absorbent was removed and disposed of by Hasa Incorporated.