City of Scottsdale Well # 80 - Executive Summary
City of Scottsdale |
Water Campus and Off-site Facilities
Risk Management Plan
Accidental Release Prevention and Emergency Response Policies
The City of Scottsdale management team is committed to achieving a goal of zero accidents and injuries. The Water Campus Hazardous Materials Management Plan (HMMP) provides specific procedures for receipt, inventory and storage of hazardous chemicals used at the facility. The HMMP also contains specific emergency response procedures should an accidental release of chemical(s) occur.
The Rural Metro Fire Department Response Plan provides procedures for how the fire department and plant operator personnel will interact during the initial phases of an emergency. In addition, the Water Campus Risk Management Plan contains a four level emergency response procedure for managing accidental chemical releases.
Facilities and Regulated Substances Handled
The Water Campus occupies 140 acres on the west side of Pima Road bounded
by Union Hills Drive on the south, WAPA utility easement on the southwest and Hualapai Drive on the northwest and north. State of the art wastewater treatment and water reclamation facilities are used to produce high quality reclaimed water for irrigation. Collectively, these facilities are called the Water Campus Reclamation Plant.
Chemical feed and storage is provided for ammonium hydroxide antiscalent, chlorine and sodium hydroxide. Ammonium hydroxide is used to combine with chlorine to enhance disinfection. Chlorine is used to disinfect WRP effluent, control bulking in the activated sludge process, control biological growth in the in the filter basins and provide product water chlorine residual for groundwater recharge. Chlorine is delivered and stored in tanker trucks that are located in the Chlorination/Dechlorination facilities. Chlorine is delivered in one ton cylinders at the CAP Plant. Both facilities are equipped with scrubber systems to mitigate a release.
dioxide is used in tandem with the ammonium hydroxide feed system upstream of the MAWT and MCAP microfilters to ensure feed water to the units is oxidant free. Sulfur dioxide is stored in the chlorination/dechlorination building. The sulfur dioxide storage room is also equipped with a scrubber to mitigate a release.
Booster Station 80 is located at 8600 East Thomas Road. Chlorine is delivered to this facility in two, one ton cylinders. The facility is equipped with a scrubber. Any major release would be handled by exiting the room, notifying Rural Metro Fire Department and allowing the scrubber to neutralize the release.
Booster Station 96 is located at 19254 North Pima Road. Chlorine is delivered to this facility in two, one ton cylinders. The facility is equipped with a scrubber. Any major release would be handled by exiting the room, notifying Rural Metro Fire Department and allowing the scrubber to neutralize the release.
Site 95 is a storage facility for up to twenty 15
0lb. Chlorine cylinders. The facility is equipped with a scrubber. Any major release would be handled by exiting the room, notifying Rural Metro Fire Department and allowing the scrubber to neutralize the release.
Cactus pool is located at 7200 East Cactus Road. Chlorine is delivered in two one ton cylinders in the chlorine storage room. The facility is equipped with a scrubber. Any major release would be handled by exiting the room, notifying Rural Metro Fire Department and allowing the scrubber to neutralize the release.
Worst Case and Alternative Release Scenarios
The City of Scottsdale conducted our own modeling on chlorine and sulfur dioxide utilizing the OCA guideline, RMP Comp and ALOHA software. The models utilized represented catastrophic release scenario, which are highly unlikely to occur. Each worst case scenario model reflected off site impact. The city's RMP Team took each scenario into consideration as part of their emergency response planning.
The city also c
onducted modeling for alternative release scenarios. The alternative release scenarios took active and passive mitigation systems into consideration, which significantly reduced off site impact.
Water Campus and Off-site Facilities Release Prevention Program
The City of Scottsdale has a number of plans, processes and procedures in-place to prevent or minimize the consequences of a hazardous chemical release. In 1994 a process hazard analysis team was formed to develop a program to prevent or minimize the consequences of any release of highly hazardous chemicals.
Process Safety Management Plan - In 1995 the PHA Team developed the city's Process Safety Management (PSM) Plan to comply with OSHA 29 CFR 1910.119. The program established minimum requirements for preventing or minimizing the consequences of any hazardous chemical release, provided guidelines for employee training. The PSM plan is reviewed annually and updated if necessary.
Employee Education and Training - The Ci
ty of Scottsdale recognizes that it is essential to provide on-going training to employees who work with highly hazardous chemicals. The following is a listing of training provided:
* Equipment and Process training
* Joint emergency preparedness training - city staff routinely trains with Rural Metro Haz Mat Team on A, B & C, Kits, SCBA's and emergency response.
* OSHA required training
* 40 hour HAZWOPER training
* On-going training at weekly tailgates and monthly safety meetings.
Active and Passive Chemical Release Mitigation Systems - all city facilities with highly hazardous chemical quantities above OSHA and EPA threshold limits are equipped with scrubbers to effectively neutralize any major release.
Water Campus Hazardous Materials Management Plan (HMMP) - was published in 1998 to present inventory and emergency response procedures for all chemicals used and stored at the facility.
Fire Department Emergency Response Plan - was developed through a joint effort by Rural Met
ro Fire Department and city staff. The plan is specific to the Water Campus and Off-site Facilities (well sites, booster stations and pools with chlorine) and includes a four level response procedure for any highly hazardous chemical release.
Five Year Accident History
We have not had an accidental chemical release in the past five years.
Emergency Response Program
As mentioned in the preceding paragraphs, city staff worked with our local fire department to develop a four level emergency response plan. The plan contains an emergency information sheet indicating agencies that may need to be contacted during an emergency. The effectiveness of our emergency response program is evaluated through periodic unannounced emergency preparedness drills.
Planned Changes to Improve Safety
The Water Campus Safety Team meets monthly to discuss plant safety issues. Any safety recommendations developed by the safety team are implemented on a timely basis.
The Process Hazard Analysis Team
continues to meet annually to review the RMP/PSM plan in order to ensure that the programs continue to work effectively.