Document N2y3M70rw3dZD03kzdmDvZ01Q
Contact Information: Name: Lisa Golden Address: St. Louis County Water Company
535 N. New Balias Rd. St. Louis, MO 63141 Phone: 314-991-3404 E-mail: lgolde~n75).slcwc. com
North Water Treatment Plant
Company Information St. Louis County Water Company, an investor-owned utility, has delivered quality drinking water to its customers for nearly 100 years. The water produced by County Water meets all state and federal standards for safe drinking water. The service population includes over one million people and more than 16,000 businesses in St. Louis County and portions of northern Jefferson County. The St. Louis County Water Company North Water Treatment Plant, located on the Missouri River in Florissant, has the capacity to produce 96 million gallons of drinking water per day.
Risk Management Planning The Environmental Protection Agency (EPA) created a regulation called Risk Management Program (RMP) as required by an amendment to the Clean Air Act. The RMP rule requires facilities with certain quantities of chemicals and other regulated substances on a specific EPA list to disclose certain information. Those facilities must make publicly available their emergency response programs, which include plans to prevent and minimize the effect of incidents; five-year accident histories for the listed chemicals; and "worst-case'' and "alternative case" scenarios related to potential releases. This information will be written in a risk management plan. The scenarios take into account potential quantities released, weather, wind direction and wind speed. The worst case scenarios assume complete failure of all safety controls and systems and no emergency response. It is important to note that these scenarios are highly unlikely. The deadline for submitting risk management plans to the EPA is June 21, 1999. The St. Louis County Water Company North Water Treatment Plant has only one of the 140 chemicals identified by the EPA above the threshold quantity.
The St. Louis County Water Company North Water Treatment Plant has compiled its accident release history for chlorine, the RMP-listed chemical, for the last five years. According to the RMP rule, the accident release history must include all accidental releases from covered processes that resulted in death, evacuations, shelter-in-place, or environmental damage. Accidental release as defined by the EPA means an unanticipated emission of a regulated chemical into the environment from a stationary source. The five-year accident histoiy, as defined by the RMP, for the St. Louis County Water Company North Water Treatment Plant is as follows:
YEAR ;19941995199619971998
Number of RMP Releases 0 0 0
1* 0
*ln 1997, a release of less than 0.2 pounds of chlorine required an employee to seek medical attention as a precautionary measure. The release had no impact on the public or the environment.
OSW 138155 STLCOPCB4038112
Example RMP Accidental Release Scenarios for the St. Louis County Water Company North Water Treatment Plant '
I lie KM1' rule defines a worst ease incident as (lie hypothetical release o f the entire container o f an RMP-lisled material within 10 minutes. It assumes weather conditions that would maximize its impact, complete failure o f all saletv controls and systems, and no emergency response. Because these worst case scenarios are extremely unlikely, the RMP rule also provides lor the development o f an alternative release scenario. These alternative release scenarios depict a more credible release o f an RMP-lisled chemical and consider safety systems that are in place.
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