Air Quality & Noise Monitoring Reports

November 20, 2017: Air Quality Report for the Commons Completions Pad

October 1, 2017 - October 31, 2017

The Town of Erie has contracted with Pinyon Environmental, Inc., to perform air quality monitoring near the Crestone Peak Resources Common Completions well site. Pinyon captured 24-hour air samples every five days at three sampling locations. 

View the air monitoring results here.



November 6, 2017: CDPHE Releases Air Quality Report for Pratt Site

The Town of Erie would like to make the public aware of a report by the Colorado Department of Public Health & Environment (CDPHE) dated November 3, 2017 titled: “Investigation of Reported Health Concerns near Pratt Oil and Gas Site in Erie.”

View the complete report here


November 2, 2017: Air Quality Report for Pratt Site & Completions Pad

The Town of Erie has contracted with Pinyon Environmental, Inc. to perform air quality monitoring near the Crestone Peak Resources Pratt well site, as well as the Common Completions Pad for the Pratt and Waste Connections well sites. Pinyon captured 24-hour air samples every five days at five sampling locations from September 5, 2017 to September 29, 2017.

View the air monitoring results from September 5, 2017 through September 29, 2017 here.


 November 1, 2017: Noise Monitoring Report for the Common Completions Pad

The Town of Erie has contracted with Pinyon Environmental, Inc., to perform noise monitoring near the Crestone Peak Resources Common Completions Pad. The Completions Pad site is used by Crestone for well completion activities for both the Waste Connections and Pratt well sites. Pinyon collected continuous noise measurements at four locations adjacent to the well site. Completions Site 1 is located approximately 350 feet to the south of the Completions Pad and was used to collect A-weighted noise measurements from September 12, 2017, at 11:00 AM to October 14, 2017, at 7:00 AM. Waste Connections Site 2 is located near a residential neighborhood approximately 3,475 feet to the southwest of the Completions Pad and was used to collect A-weighted and C-weighted noise measurements from September 12, 2017, at 11:00 AM to October 14, 2017, at 7:00 AM. Pratt Site 2 is located near a residential neighborhood approximately 3,600 feet to the southeast of the Completions Pad and was
used to collect A-weighted and C-weighted noise from September 12, 2017, at 7:00 AM to September 26, 2017, at 10:00 AM when measurement collection ceased at this location per the direction of the Town.  

Completions Site 2 was selected by the Town to replace Pratt Site 2. Completions Site 2 is located near a residential neighborhood approximately 2,430 feet to the south of the Completions Pad and was used to collect A-weighted and C-weighted measurements from September 26, 2017, at 11:00 AM to October 14, 2017, at 7:00 AM. C-weighted noise was not collected at Sampling Site 1 as is not located near any occupied structures.  Crestone began well completion activities at the Completions Pad the week of September 11, 2017, and  continued activities at this location throughout the reporting period. This report details noise measurements collected during well completions activities, from September 12, 2017, at 11:00 AM through October 14, 2017.  The noise monitoring data was analyzed to evaluate noise levels at the four locations during Crestone’s well  completions activities.

View the noise monitoring results from September 12, 2017 through October 14, 2017 here



November 1, 2017: Noise Monitoring Report for Pratt Site

The Town of Erie has contracted with Pinyon Environmental, Inc. to perform noise monitoring near the Crestone Peak Resources Pratt well site. Pinyon collected continuous noise measurements at three locations adjacent to the well site.  Pratt Site 1 is located approximately 350 feet to the south of the well site and was used to collect A-weighted noise measurements. Pratt Site 2 is located near a residential neighborhood approximately 830 feet to the southeast of the well site. Waste Connections Site 2 is located near a residential neighborhood approximately 5,100 feet to the southwest of the well site.  Both A-weighted and C-weighted noise measurements were collected at Pratt Site 2 and Waste Connections  Site 2. C-weighted noise was not collected at Sampling Site 1 as is not located near any occupied structures.  This report details noise measurements collected during drilling activities, from August 1, 2017, at 7:00 AM through September 12, 2017, at 7:00 AM, and compares these levels to the baseline data. 

View the noise monitoring results from August 1, 2017 through September 12, 2017 here



November 1, 2017: Air Quality Report for Pratt Site

The Town of Erie has contracted with Pinyon Environmental, Inc., to perform air quality monitoring near the Crestone Peak Resources Pratt well site. Pinyon captured 24-hour air samples every five days at three sampling locations. Sampling Site 1 is located 500 feet to the south of the Pratt well site. This location was selected by the Town to evaluate maximum concentrations near to the well site. Pratt Site 2 is located 830 feet to the southeast of the Pratt well site in a residential neighborhood. Waste Connections Site 2 is located 5,100 feet to the southwest of the Pratt well site in a residential neighborhood. Pratt Site 2 and Waste Connections Site 2 were selected by the Town to evaluate potential exposures to residents located closest to the well site. Pinyon collected air samples from August 5, 2017, though August 30, 2017.


View the air monitoring results from August 1, 2017 through August 31, 2017 here



August 18, 2017: Noise Monitoring Report for Pratt Site

The Town of Erie has contracted with Pinyon Environmental, Inc., to perform noise monitoring near the Crestone Peak Resources Pratt well site. Pinyon collected continuous noise measurements at two locations adjacent to the well site. Sampling Site 1 is located approximately 350 feet to the south of the well site and was used to collect A-weighted noise measurements. Sampling Site 2 is located near a residential neighborhood approximately 830 feet to the southeast of the well site. Both A-weighted and C-weighted noise measurements were collected at Sampling Site 2. C-weighted noise was collected at Sampling Site 2 only, as Sampling Site 1 is not located near any occupied structures.

View the noise monitoring results from July 18, 2017 through July 31, 2017 here

August 4, 2017: CDPHE Releases Air Quality Report for Waste Connections Site

The Town of Erie would like to make the public aware of a report by the Colorado Department of Public Health & Environment (CDPHE) titled: “Investigation of Reported Health Concerns near Waste Connections Oil and Gas Site in Erie.

View the complete report here

August 3, 2017: Air Quality Report for Waste Connections Site

The Town of Erie has contracted with Pinyon Environmental, Inc., to perform air quality monitoring near the Crestone Peak Resources Waste Connections well site. Pinyon captured 24-hour air samples every five days at two sampling locations. Sampling Site 2 is located to the west of Vista Parkway in a residential neighborhood, approximately 1,250 feet to the southwest of the Waste Connections well site. This location was selected by the Town to evaluate potential exposure to residents located closest to the well site. Pinyon collected air samples at Sampling Site 2 from April 15, 2017, through June 30, 2017, including two baseline samples collected prior to when Crestone began operations at the well site. Sampling Site 1 is located 476 feet to the southeast of the Waste Connections well site. This location was selected by the Town to evaluate maximum concentrations adjacent to the well site. At the direction of Town staff, Pinyon began collecting air samples at Sampling Site 1 on June 16, 2017.

A health screening evaluation of compounds detected in the samples collected from June 5, 2017, through June 30, 2017, was conducted to identify exposure for citizens in the area. A statistical analysis of trends in concentrations detected from the start of the sampling, April 15, 2017, through June 30, 2017, was also completed. Crestone began drilling operations on April 25, 2017, and continued activities at the well site throughout this reporting period.

View the air quality report from June 5, 2017 through June 30, 2017 here.



July 21, 2017: Noise Monitoring Report - Waste Connections Site

The Town of Erie has contracted with Pinyon Environmental, Inc., to perform noise monitoring near the Crestone Peak Resources Waste Connections well site. Pinyon collected continuous noise measurements at two locations adjacent to the well site. Sampling Site 1 is located approximately 475 feet to the southeast of the well site and collected A-weighted noise measurements.  Sampling Site 2 is located near a residential neighborhood approximately 1,400 feet to the southwest of the well site. Both A-weighted and C-weighted noise measurements were collected at Site 2. C-weighted noise was collected at Site 2 only as Site 1 is not located near any occupied structures. 

View the noise monitoring results from June 1, 2017 through June 30, 2017 here



July 17, 2017: Noise Monitoring Report - Woolley Becky Sosa & Morgan Hills Sites


The Town of Erie has contracted with Pinyon Environmental to perform noise monitoring near the Crestone Peak Resources Woolley Becky Sosa and Morgan Hills well sites. Pinyon collected continuous noise measurements located to the north of the intersection of Fletcher Drive and Weld County Road 10-1/2 from June 12, 2017 at 7:00 a.m., to June 30, 2017 at 11:30 a.m..  Noise monitoring data was analyzed to determine whether citizens in the area were exposed to noise levels in exceedance of the Colorado Oil and Gas Conservation Committee (COGCC) maximum permissible noise levels. 

During this reporting period, it is unlikely that any exceedances of the COGCC’s maximum permissible A-weighted noise levels occurred at the monitoring location during daytime or nighttime hours.

In order to determine if a noise violation has occurred, COGCC regulations require such monitoring be conducted at a distance of 350 feet from a well site.  However, due to access constraints at this particular property, noise monitoring was conducted at a distance greater than 1,000 feet from the well sites. 

View the noise monitoring results from June 12, 2017 through June 30, 2017 here


June 27, 2017: Air Quality Report - Waste Connections

The Town of Erie has contracted with Pinyon Environmental, Inc., to perform air quality monitoring near the Crestone Peak Resources Waste Connections well site. Pinyon captured 24-hour air samples every five days at the residential sampling location (Sampling Site 2), located to the west of Vista Parkway from April 26 through May 31, 2017. Sampling Site 2 is located approximately 1,250 feet to the southwest of the Waste Connections well site. This location was selected by the Town to evaluate the level
of potential exposure that may be experienced by the residents located in closest proximity to the well site.  A health screening evaluation of the concentrations of compounds detected in these samples was conducted to identify baseline exposures for citizens in the area. Crestone began drilling operations on April 25, 2017, and has continued activities at the well site throughout this reporting period.

View the air quality report from April 26, 2017 through May 31, 2017 here


June 16, 2017: Noise Monitoring Report - Waste Connections

The Town of Erie has contracted with Pinyon Environmental to perform noise monitoring
near the Crestone Peak Resources Waste Connections well site. Pinyon collected continuous noise measurements at two locations adjacent to the well site. Sampling Site 1 is located approximately 350-feet to the southeast of the well site and collected A-weighted noise measurements. Sampling Site 2 is located near a residential neighborhood approximately 1,400-feet to the southwest of the well site and collected both A-weighted and C-weighted noise measurements. Crestone began deploying vehicles and equipment to the Waste Connections well site at approximately 7:00 AM on April 25, 2017. This report details noise measurements collected from April 25, 2017 at 7:00 AM through May 31, 2017 at 7:00 PM. The noise monitoring data was analyzed to evaluate noise levels at the two locations during Crestone’s well production activities.

View the noise monitoring results from April 25, 2017 through May 31, 2017 here


May 25, 2017: CDPHE Releases Air Quality Report for Woolley-Sosa and Erie Champlin Sites

The Town of Erie would like to make the public aware of a report issued this week by the CDPHE titled: “Health Risk Evaluation from Inhalation of VOCs in Ambient Air Near Woolley-Sosa and Erie Champlin Oil and Gas Sites.”

Summary: The Oil and Gas Health Information and Response (OGHIR) Program at the Colorado Department of Public Health and Environment (CDPHE) received a large volume of calls since December 2016 from residents in multiple neighborhoods in Erie reporting odor and health concerns possibly related to emissions from Woolley-Sosa and Erie Champlin sites.

In response, OGHIR deployed the Colorado Air Monitoring Mobile Laboratory (CAMML) on March 7-8 and March 20-23, to measure volatile organic compounds (VOCs) in the air where residents have reported health symptoms and odors.

The evaluation indicated that all air concentrations of individual and combined VOCs were below non-cancer health-based reference values. Cancer risks estimates for benzene, ethylbenzene, and the two VOCs combined were less than one in one hundred thousand, which is generally considered to be within the acceptable risk range.
Using currently available measurement technology and risk assessment methods, OGHIR is unable to document conditions that suggest an ongoing health hazard at this time.

May 1, 2017: Baseline Air Quality Sample Results - Waste Connections 

The Town of Erie has contracted with Pinyon Environmental to perform air quality monitoring near the Crestone Peak Resources Waste Connections well site. Pinyon collected two 24-hour baseline air samples at the residential sampling location (Sampling Site 2) located to the west of Vista Parkway on April 15th 2017 and April 21st 2017. A health screening evaluation from these samples was conducted to identify baseline exposures for citizens in the area.

May 1, 2017: Baseline Noise Monitoring Results - Waste Connections

The Town of Erie has contracted with Pinyon Environmental to perform noise monitoring near the Crestone Peak Resources Waste Connections well site. Pinyon collected continuous noise measurements at two locations adjacent to the well site.  Sampling Site 1 is located approximately 350 feet to the southeast of the well site and collected A-weighted noise measurements. Sampling Site 2 is located near a residential neighborhood approximately 1,400-feet to the southwest of the well site and collected both A-weighted and C-weighted noise measurements.

February 4, 2013: Analysis of CDPHE Data Determines Health Risk is Low


The information provided in this report documents research conducted by the Colorado Department of Public Health and Environment (CDPHE) in July and August 2012. Based on the understanding that the CDPHE study is limited in scope and quantity of data, the risk of Erie residents of experiencing an adverse health effect over a lifetime exposure to the CDPHE reported concentrations of the gases discussed in this report is low.

May 8, 2012: Second Analysis of NOAA Data Determines Low Risk of Adverse Health Effects


As part of continued efforts to address the public’s questions and concerns, the Town of Erie engaged in a second Air Quality Assessment of the NOAA data to determine what (if any) health effects would result from exposures to the levels of propane and benzene as presented.

The scientific analysis of the data conducted by Pinyon Environmental, Inc. concluded that the risk of Erie residents experiencing an adverse health effect over a lifetime exposure (70 years) to the reported Benzene and Propane concentrations is low.

During her presentation of the analysis to the Town of Erie Board of Trustees, Cynthia Ellwood, Ph.D., CIH, stated that compared to the levels presented by NOAA, the public would be at a greater exposure risk to Benzene when engaged in activities such as:
  • Eating in a restaurant which permits smoking
  • Fueling a vehicle at a gas station
  • Sitting around a campfire
  • Sitting in an idling car
  • Waiting in a drive-thru lane
View the Air Quality Assessment Report and the Air Quality Assessment Presentation.

April 24, 2012: Analysis of NOAA Data Determines Erie’ s Air Remains Safe


As part of efforts to do everything within its authority to protect resident’s health and safety, the Town of Erie engaged in an independent, peer-reviewed Analysis and Health Impact of Propane Levels of the NOAA data to determine what (if any) health effects would result from exposures to the levels of propane as presented.

The scientific analysis of the data concludes that: “The levels of Propane in the NOAA study are 1,000 fold or more below those considered to be of a health concern.” The average level of Propane as presented by NOAA was 20 parts per billion (ppb) and the maximum level was 115 ppb. According to the analysis: “Propane at 115 ppb (the peak level found) does not present a health concern to the citizens of the Town of Erie.”

View the Scientific Analysis and Health Impact of Propane Report and the Scientific Analysis and Health Impact of Propane Summary.

NOAA Summary of Findings


NOAA has posted a Summary of Findings for their Winter Air Quality Study conducted from the Boulder Atmospheric Observatory near Erie. The findings were presented by Dr. Steve Brown during the February 21, 2012 Board of Trustees meeting.

According to the NOAA summary: "The Boulder Atmospheric Observatory (BAO) tower provides a convenient site for making measurements of air quality. Although the tower is located near Erie, Colorado, measurements of elevated pollutant levels at the BAO do not imply that those levels are confined to the area or that the pollutants come from sources only in the immediate area. Tower data typically provide information representative of the broader Front Range region."

"Please note that analysis of the data from this study is in progress. When a peer-reviewed paper is published, we will make it available to the public."

View the NOAA Summary of Findings.