Author: Tracy Roberts
Ambient Air Monitoring Active Report
To convert from ppb (parts per billion) to ppm (parts per million), you divide the ppb value by 1,000, because 1 ppm is equivalent to 1,000 ppb. For example, 500 ppb is 0.5 ppm (500 / 1000 = 0.5), and 100 ppb is 0.1 ppm (100 / 1000 = 0.1).
Examples
2,500 ppb: 2,500 / 1,000 = 2.5 ppm
100 ppb: 100 / 1,000 = 0.1 ppm
500 ppb: 500 / 1,000 = 0.5 ppm
You can also use any free online converter. https://www.inchcalculator.com/ppb-to-ppm-converter/
Risk Based on Level of Exposure of H2S
0.0002-0.3ppm Odor Detection threshold, 0.0014ppm Daily exposure likely to be without risk, 0.02ppm 15-364 days of exposure with minimal risk, 0.07ppm 14 days or less of exposure with minimal risk, 10ppm 10-minute exposure limit, 20ppm Ceiling Limit, 50ppm Peak 10-min exposure limit, 100ppm Immediately dangerous to life or health, 40,000-440,000ppm Explosive (lower and upper limits)
What does H2S gas smell like at low concentrations?
At low concentrations, hydrogen sulfide (H₂S) smells distinctly like rotten eggs, a warning sign of its presence, detectable in air from parts per billion (ppb) to low parts per million (ppm). This familiar odor comes from decaying organic matter in places like sewers, swamps, and landfills, but at higher levels, it can quickly overwhelm your sense of smell, causing olfactory fatigue, making it undetectable even as it becomes more dangerous.
24 Hour Drager Monitor Results
The 24-hour continuous monitoring system was installed on March 12, 2026, at the landfill site. The system is configured with a low alarm threshold of 10 ppm (A1) and a high alarm threshold of 15 ppm (A2), as detailed in the accompanying data sheets.
Each screenshot diagram displays the actual readings for the specified time period with a blue line. The overview on the screenshot indicates the alarm thresholds and any readings within the time frame. The Excel spreadsheets provide the alarm thresholds and detail the H2S readings, along with any other alarms or warnings.
Notes for March 15 readings: 1. The Logged Value data displays every time the monitor detected a concentration change, regardless of how quickly or often, and the 15-minute time waited average (TWA) in the adjacent column. 2. The 1-Min Avg data displays the average reading over each 60-second period, the same 15-minute TWA column, and a column for both the minimum reading and peak reading during that 60-second period.
Updated information from Senator Tim Shallenburger 3/13/2026
Please see the following update received yesterday from KDHE regarding EPA testing at the GALENA LANDFILL:
“EPA arrived on site yesterday and sampled in three fixed locations and eight “roving” locations (observed by mobile sampling equipment) south and east of the landfill in residential and commercial areas. There were no detections at these locations of any contaminants of concerns, which included volatile organic compounds (VOCs), hydrogen sulfide (H2S), carbon monoxide (CO) and LEL (combustible gases). There were slightly detectable particulates, but this could be reasonably attributed to traffic or atmospheric conditions.
EPA continued monitoring overnight at two locations and then did some sampling near the smoldering area.
Today, right in the hotspot, there were low detections of VOCs and carbon monoxide, as would be expected near smoke emissions. There continued to be no detections away from the hotspot. Based on this, and the City’s own monitoring capability, EPA will likely demobilize either later today or tomorrow. We will continue to work with the Cherokee County Health Department, City, and Jordan Disposal and monitor this situation.”
KDHE also produced some FAQ regarding the landfill and can be found here: https://www.kdhe.ks.gov/2391/Galena-Construction-Demolition-Landfill-
Sharing information from Senator Tim Shallenburger
My office has been working alongside Representative Helwig and KDHE to get some answers on the Jordan Landfill. This afternoon, we received the following update from HDHE:
“On Friday, KDHE was contacted about a subsurface smoldering event in the Construction and Demolition portion of the landfill. The smoldering was actually discovered during work to begin installation of a filter/venting system intended to mitigate odors. Smoldering events produce smoke and can cause increased odors and distress to neighbors. The following response actions have been taken:
Jordon Disposal began immediately to excavate and extinguish the smoldering.
Jordan Disposal notified KDHE that hydrogen sulfide levels in the excavation pit were 10 parts per million. A one-time reading at this level exceeds our standard but is not a health risk over a short, limited period.
On Tuesday (yesterday), KDHE staff were on site and recommended additional air sampling be performed.
Meteorological reports showed the wind would change, to blow from the north toward more residents, and this has now happened.
KDHE therefore submitted a Request for Assistance to EPA to perform on-site air monitoring. This air monitoring will allow KDHE to keep residents informed and take precautionary measures if there is any risk to human health.”
KDHE also produced some FAQ regarding the landfill and can be found here: https://www.kdhe.ks.gov/2391/Galena-Construction-Demolition-Landfill-
Accepting Letters of Interest for Vacancy on the Planning and Zoning Committee
1 Position available
Position 1- shall reside outside of but within 3 miles of the corporate limits of Galena, Kansas. (updated)
Overview:
POWERS AND DUTIES. (a) The planning commission and city governing body shall have all the powers and duties set forth in K.S.A. 12-701 et seq., and amendments thereto, and such other powers and duties as are now or may hereafter be prescribed by law. (b) In the event the city has no city planning commission or the city planning commission lacks a quorum, the city council may exercise the duties thereof.
BOARD OF ZONING APPEALS. The planning commission is hereby designated to serve as the city’s board of zoning ppeals with all the powers and duties as provided for in K.S.A. 12-759. The board shall adopt rules in the form of bylaws for its operation which shall include hearing procedures. Such bylaws shall be subject to the approval of the governing body. Public records shall be kept of all official actions of the board which shall be maintained separately from those of the commission. The board shall keep minutes of its proceedings showing evidence presented, findings of fact, decisions and the vote upon each
question or appeal. A majority of the members of the board present and voting at the hearing shall be required to decide any appeal. Subject to subsequent approval of the governing body, the board shall establish a scale of reasonable fees to be paid in advance by the appealing party.
The City of Galena is always looking for dedicated residents who care about their community’s future to serve on our governing body or committees.
Letters of interest can be mailed or delivered to City of Galena 211 W 7th St. Galena, Kansas 66739, faxed to 620-783-5111, or you may fill out the form below. Deadline: March 16, 2026.
H2S Monitoring Reports
Please find attached the H2S Monitoring Reports submitted to the City of Galena. For further information, kindly contact the Clerk’s Office at 620-783-5265 ext. 1.
This is an active document and will be updated as more information becomes available.