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f x 1 Human Factors <br />I 1 Design Shortcoming <br />[ 1 Misapplied Equipment <br />1 1 Power Failure <br />I 1 Corrosion <br />J. 1 Inadequate Maintenance <br />f 1 Earthquake <br />Li Equipment Defect/ <br />Malfunction <br />I 1 Improper Installation <br />[ xj Mechanical Damage <br />1 1 Hydrostatic Expansion <br />Li Hydraulic Shock <br />1 1 Inadequate <br />Administrative Controls <br />Li Controls Failure <br />f 1 Process Upset <br />f x 1 Other Emergency (Storm) <br />I 1 System Change <br />1 1 Maintenance Activity <br />I 1 Inadequate Labeling <br /> <br />1 1 Near-Miss <br />1 1 Vapor Release <br /> <br />f x 1 Liquid Spill <br />LA Fire/Explosion <br /> <br />Other: <br /> <br />Primary Source of Release (Check One) <br />1 1 Oil Drain Valve <br />1 1 Compressor <br />1 1 Condenser <br />1 1 Evaporator <br />I 1 Pump <br />1 1 Pressure Vessel <br />1 x 1 Piping <br />I 1 Manual Valve <br /> <br />1 1 Pressure Relief Valve <br />Li Automatic Control Valve <br />1 1 Charging Connection <br />J 1 Other <br /> <br />Cause(s) Contributing to Release (Check any that apply) <br /> <br />City of Tracy VVWTP Incident Investigation <br />Facility Information <br />Name: <br />City of Tracy Waste Water Treatment Plant <br />Date of Incident: <br />January 26, 2021 <br />Address: <br />3900 Holly Drive <br />Tracy, California 95304 <br />Offsite Responders Notified: <br />CUPA, OES, National Response Center, Regional Water Quality Control Board <br />Process Involved: <br />Aqueous Ammonia Injection System <br />Chemical Released: <br />Aqueous Ammonia <br />Total Quantity Released (lbs): <br />2400 lbs <br />Normal Inventory in the System (lbs): <br />Approx. 7200 lbs <br />Release Duration: <br />Approximately 3 hours <br />Incident Type (Check any that apply)