2021-05-06_HYDROLOGY - M1977493 - Laserfiche WebLink

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C. Actual or estimated duration of the event and time spill was fully controlled/stopped. If release is still occurring, the date and time the release is expected to be stopped. It is estimated that the leak started at 12:30pm on April 27, 2021 and was fully controlled/stopped at 3:30pm on April 27, 2021. D. Describe measures taken or planned to contain, reduce, and clean up spill or release. On the day of the incident, and as soon as Climax confirmed the source of the water flowing into the West Interceptor, the pump feeding the pipeline was stopped and flow was ceased. A berm was placed between the leaking pipeline and the West Interceptor to prevent any remaining water on the road from entering the West Interceptor. The pipeline repair is expected to be completed on May 5, 2021 and the pipeline will not be charged/repressurized until the repair occurs. E. Describe steps taken or planned to prevent reoccurrence. As already noted, the pipeline will be repaired on May 5, 2021. The pipeline will be taken down again in June 2021 so the section of pipeline can be replaced. Going forward the following actions will be implemented: • Continue area inspections every shift • Continuation of the Cathodic Protection System and annual testing • Internal video inspections on 10 ear freguency starting in 2021 include:3. Incident impact to state waters (As defined in 5 25-8-103(19), C.R.S.). Examples of state waters discharge to perennialintermittent . ephemeral gulches, ditches, ponds, A. Did flow or materials reach surface water of the state? If so, identify the water body or bodies and describe the path of flow. What quantity of material reached the surface waters and what was the resulting impact? The process water leaked from the pipeline at a rate of 10 gallons per minute into Climax's stormwater diversion conveyance called the West Interceptor. The West Interceptor than reports to an area called the mixing zone where water from the West Interceptor, East Interceptor, and effluent from the Climax PDWTP come together. From here the water flows to Outfall 001A under Climax's CDPS permit (No. CO0000248) and into Tenmile Creek. It is estimated that approximately 1,800 gallons of process water flowed into the West Interceptor before the pipeline stopped discharging. There were no impacts to Tenmile Creek since samples taken at 3:17pm during the incident at Outfall 001A indicated that permit effluent limitations were not exceeded. See attached sample analysis for the leakage and Outfall 001A. B. Did flow or materials reach groundwater of the state? If so, identify the water body or bodies and describe the path of flow. If yes, what quantity of material reached the ground or groundwater and what was the resulting impact? No C. Did the incident include any of the following? If so, please include additional details below. ❑ Chemical release ❑ Fish kill ❑ Sheen on water Not applicable D. Were any water quality samples or other samples taken? If so, please describe sampling process, sampling locations) in relationship to the incident, i.e. up/down stream and attach results. Yes, Samples were obtained of the leak and at Outfall 001A. The pH was measured in the field. The pH for the pipeline leakage, noted as Mayflower Decant in the lab report, was 7 and the pH measured at Outfall 001A was 8.08. See attached map and sample analysis. impact4. Incident A. Describe the potential impact of the incident/spi It/SSO to public use areas or downstream water users. This includes parks and swim beaches or public water system sources and irrigation diversions. There were no potential impacts to public use areas or downstream water users. B. Were the impacted area users and downstream water users notified and describe the method of notification, e.g. signs posted, via phone. No downstream users were notified C. List any downstream users who were notified. Not applicable I hereby certify that the information presented above is accurate and complete. Revised November 2017