On the morning of November 6 at about 8:30 am, residents in Anthem Highlands reported to the City a strong sulphur-like smell near Thunder Vista School and the surrounding area. According to a resident, the City’s response to her call was that it was likely from Extraction pipeline work that was beginning in the area.
Some residents also filed complaints using the City’s new online Broomfield File a Complaint Process for oil and gas development. There is a box to check “Yes, my health is being impacted” at the top which would also link the complaintant to the COGCC site to enter data there.
Later in the afternoon, Broomfield posted a response on its oil and gas webpage stating:
– North Metro Fire and Rescue District used a meter and didn’t detect any gases or odors at the site.
– Broomfield Oil and Gas Inspector didn’t detect any odors.
– School officials could not identify any odors.
– Public Works has not identified any sewer problems.
-Extraction’s pipeline activities were not related.
Residents who filed an online complaint also received a similar email reply from Laura Davis, Broomfield Assistant Director of Public Health, at about 11:30 pm on Nov. 6. Some residents thought that the investigation focused too narrowly on Thunder Vista School when other residents in the area also reported the odor of hydrogen sulfide.
On Saturday evening, Nov. 10, Broomfield tweeted that there was an “Update on 11/6 odor complaint.” The post stated:
“On Tuesday, November 6, multiple odor complaints were received from residents in the Anthem Subdivision, stating that there was a smell of sulfur or rotten eggs. After the odor complaints were received, there was an initial response taken by the North Metro Fire Rescue Department, Broomfield Emergency Management, Broomfield Public Health, Broomfield Public Works, and Extraction Oil and Gas. As a follow up to the initial response, Broomfield staff discussed the issue with Dan Bon with the Colorado Department of Public Health and Environment. Since the Colorado Air Monitoring Mobile Lab (CAMML) has been deployed since October 29, 2018, Broomfield staff inquired about hydrogen sulfide (H2S) levels during the time of the complaints. Dr. Bon stated that from 6-10 a.m. on November 6, 2018, there were H2S levels that were slightly above baseline. He went on say that this was considered unremarkable and would not have raised a concern. He only noted it because of the Broomfield inquiry. This level is not a violation of any applicable air standards. As a routine practice, Broomfield will utilize air monitoring partners to provide data associated with odor and air quality complaints.”