HomeMy WebLinkAboutTe Velde 29-28HZ - Air Monitoring Program/Report - Kerr McGee - 10/31/2021
October 31, 2021
Kerr-McGee Oil & Gas Onshore LP
1099 18th Street
Denver, CO 80202
720-929-6000
Marty Ostholthoff - LGD and Planning Manger Nancy D. Chick
151 Grant Avenue Physical Science Researcher
P.O. Box 100 CDPHE
Firestone, CO 80520 4300 Cherry Creek Drive S.
Denver, CO 80246-1530
Mr. Taylor Robinson
Environmental Health Specialist
Mr. Jason Maxey
OGED Director and Local Government Designee
Oil & Gas Energy Department
1301 N. 17th Ave.
Greeley, CO 80631
Re: Air Monitoring Program: Te Velde 29-28HZ Pad and Production Facility
Weld County, Colorado
In accordance with CDPHE Regulation 7 VI.C.2.b, Kerr-McGee is submitting the Air Monitoring Report for
Completions Operations monitoring during September 2021 for this location.
Kerr-McGee has contracted Montrose Air Quality Services, LLC (Montrose) to perform the air monitoring
at this location. Attached is the Air Monitoring Report prepared by Montrose. Air Monitoring was conducted
in accordance with the Kerr-McGee Air Monitoring Program approved by CDPHE in a letter dated April 20,
2021. Results from 32 air samples from carbon desorption tubes are included in this report. All results
are below the health guidance values (HGVs) guidelines compiled by the Colorado Department of Public
Health and Environment (CDPHE).
Montrose was notified on September 21, 2021 by Enthalpy that a data recall had been made on sets of
carbon sorbent tubes analyzed during July and August. This recall was due to a calibration gas
concentration not being updated in the lab’s analysis spreadsheet. This caused results to be under
reported by up to 5%. This issue affected passive tubes collected at TeVelde from 07/09/21 to 07/23/21
submitted in the July (017AA-008129-RT-31) report. The updated results for these sampling periods are
included in the report. A signed letter from Enthalpy’s Technical and QA Directors describing the issue
and corrective action is included in the report. All updated results are below the HGV guidelines compiled
by the CDPHE.
The Air Monitoring Program establishes three (3) levels of investigation responses to ensure protection of
public health, safety, welfare, the environment, and wildlife resources. Sections 14 and 15 of the air
monitoring program detail these levels and responses. If a Level 3 event occurs, Kerr-McGee will notify
the CDPHE and local government with jurisdiction over this pad within 48 hours of receiving notification.
There were no readings from the continuous PID analyzers or analytical results above the Investigation
Levels.
If you have any questions, please contact Chad Schlichtemeier at Chad_Schlichtemeier@oxy.com.
AMBIENT MONITORING REPORT
TE VELDE 29-28HZ PAD
COMPLETIONS and PRODUCTION PHASE
KERR-MCGEE OIL & GAS ONSHORE LP
Prepared For:
Kerr-McGee Oil & Gas Onshore LP
1099 18th St #1800
Denver, Colorado 80202
Prepared By:
Montrose Air Quality Services, LLC
990 W. 43rd Avenue
Denver, Colorado 80211
Document Number: 017AA-008129-RT-65
Reporting Period: September 1 through September 30, 2021
Completions Monitoring: August 2 through September 3, 2021
Production Monitoring: September 4 through March 6, 2022
Report Date: October 31, 2021
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 2
Table of Contents
PROJECT OVERVIEW ............................................................................................................................... 3
Summary ...................................................................................................................................................... 3
Project Scope ............................................................................................................................................... 3
Contact Information .................................................................................................................................... 3
Well Pad Site Description............................................................................................................................ 3
Sampling Locations for Completions Monitoring ....................................................................................... 3
Sampling Locations for Production Monitoring .......................................................................................... 5
Methodology ................................................................................................................................................ 7
Phase of Operation and Activities During Reporting Period ...................................................................... 8
Summary of Down Time or Equipment Malfunction ................................................................................... 8
Summary of Investigations and Response .................................................................................................... 8
Discussion of Results ................................................................................................................................... 9
SUMMARY OF RESULTS ........................................................................................................................ 10
Figure 1 – Te Velde 29-28HZ Southeast VOC Data.................................................................................. 10
Figure 2 – Te Velde 29-28HZ Southwest VOC Data ................................................................................. 11
Figure 3– Te Velde 29-28HZ West VOC Data .......................................................................................... 12
Figure 4 – Te Velde 29-28HZ East VOC Data .......................................................................................... 13
Table 1 – Te Velde VOC Data Analysis ..................................................................................................... 14
Figure 5 – Te Velde 29-28HZ Meteorological Data ................................................................................. 15
Table 2 –Passive Sampling Results ........................................................................................................... 16
Table 3 –Passive Sampling Results ........................................................................................................... 17
Table 4 –Revised Sampling Results ........................................................................................................... 18
APPENDIX A: CALIBRATION AND QA/QC DATA
APPENDIX B: FIELD DATA SHEETS
APPENDIX C: CALIBRATION GAS CERTIFICATION SHEETS
APPENDIX D: API AND AIRS NUMBERS
APPENDIX E: OPERATIONS ACTIVITY
APPENDIX F: INVESTIGATION LEVEL EVENT DESCRIPTIONS
APPENDIX G: ENTHALPY NOTICE OF ERROR
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 3
Project Overview
Summary
Montrose Air Quality Services, LLC (Montrose) was contracted by Kerr-McGee Oil & Gas
Onshore LP (Kerr-McGee) to conduct air monitoring at the Te Velde 29-28HZ Pad. This
report covers the reporting period from September 1 through September 30, 2021. Air
Monitoring was conducted in accordance with the Kerr-McGee Air Monitoring Program
approved by CDPHE in a letter dated April 20, 2021. All air samples taken during the
reporting period were well below the Health Guidance Values (HGVs) compiled by the
CDPHE. There were no readings from the continuous PID analyzers or analytical results
above the Investigation Levels.
Project Scope
Continuous monitoring for VOCs and passive sampling for benzene commenced on May
14, 2021. The PID analyzers (named “SPOD”) used around the Te Velde 29-28HZ facility
were manufactured by SENSIT. Each sensor is solar powered and transmits data to the
data platform via LTE cell technology. The data is 128-bit encrypted during transmission.
Four (4) sensors monitored for VOCs and one (1) for the meteorological parameters during
the reporting period. All sampling was performed by Montrose.
Contact Information
The contact information for each of the principal parties is summarized in the tables below:
Chad Schlichtemeier Austin Heitmann
Occidental Montrose Air Quality Services, LLC
1099 18th Street 990 West 43rd Ave
Denver, CO 80202 Denver, CO 80216
Phone: (720) 929-6867 Phone: (303) 670-0530
E-mail: Chad_Schlichtemeier@Oxy.com E-mail: AHeitmann@Montrose-Env.com
Well Pad Site Description
The Kerr-McGee Te Velde 29-28HZ well pad facility location.
Latitude Longitude
Te Velde 29-28HZ Pad 40.115633 -104.899865
Parent Well Code 1123051235068
Legal Description: NNW 28 2N 67W 6 PM
The API number of the wells and any associated facility or equipment AIRS numbers can
be found in Appendix D.
Sampling Locations for Completions Monitoring
Sampling locations are labeled by ID on the map below.
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 4
The GPS coordinates of the locations are listed in the following table.
Location
ID GPS Coordinates Distance from
Facilities (ft) Monitoring Technology
T9 40.11406, -104.89612 300 PID Analyzer, Carbon Sorbent
Tube
T10 40.114357, -104.899150 165 Carbon Sorbent Tube
T11 40.114366, -104.899656 165 Carbon Sorbent Tube
T12 40.114344, -104.900292 165 Carbon Sorbent Tube
T13 40.114051, -104.901119 300 PID Analyzer, Carbon Sorbent
Tube
T14 40.114928, -104.900937 120 Carbon Sorbent Tube
T15 40.115652, -104.90023 120 Carbon Sorbent Tube
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 5
Location
ID GPS Coordinates Distance from
Facilities (ft) Monitoring Technology
T16 40.116132, -104.900866 120 Carbon Sorbent Tube
T17 40.115577, -104.901473 250 PID Analyzer, Carbon Sorbent
Tube
T18 40.116727, -104.900294 165 Carbon Sorbent Tube
T19 40.116759, -104.899747 165 Carbon Sorbent Tube
T20 40.116704, -104.899125 165 Carbon Sorbent Tube
T21 40.115868, -104.897742 165 Carbon Sorbent Tube
T22 40.115564, -104.897744 165 Carbon Sorbent Tube
T23 40.115195, -104.897746 165 Carbon Sorbent Tube
T24 40.115504, -104.896630 300 PID Analyzer, Carbon Sorbent
Tube
Sampling Locations for Production Monitoring
Completion activities were completed on 9/3/21. In compliance with the monitoring plan
for production monitoring all non-PID analyzer locations were removed and four (4) PID
analyzers with collocated carbon sorbent tubes were left in place as the map below
describes on 09/16/21. Sampling locations are labeled by ID on the map below.
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 6
The GPS coordinates of the locations are listed in the following table.
Location
ID GPS Coordinates Distance from
Facilities (ft) Monitoring Technology
T9 40.11406, -104.89612 300 PID Analyzer, Carbon Sorbent
Tube
T13 40.114051, -104.901119 300 PID Analyzer, Carbon Sorbent
Tube
T17 40.115577, -104.901473 250 PID Analyzer, Carbon Sorbent
Tube
T24 40.115504, -104.896630 300 PID Analyzer, Carbon Sorbent
Tube
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 7
Methodology
Continuous Monitoring
The monitoring on the perimeter of the well pad is being performed using PID VOC
analyzers. In the device sampling occurs by allowing the ambient air to passively enter the
devices exterior housing via small holes and pass over the surface of the sensor. Each
device used in this project is solar powered and transmits data via cellular.
A PID sensor contains a lamp that produces photons that carry enough energy to break
molecules into ions. The PID will only respond to molecules that have an ionization energy
at or below the energy of the lamp, the PID used on this project employs a 10.6 electron-
volt lamp. The produced ions then generate an electrical current that is measured as the
output of the detector. The PID used in this monitoring campaign is manufactured by
IonScience, a United Kingdom company. The sensor mitigates the traditional PID issue of
humidity bias, by installing a hydrophobic filter between the lamp and the ambient air.
Water molecules are deterred from entering the ion producing chamber and absorbing
radiation. The PID themselves are also heated slightly above ambient temperature to
improve stability of the detector.
All continuous monitoring equipment operation and maintenance procedures followed the
Quality Assurance Project Plan provided in the Kerr-McGee Air Monitoring Program.
Carbon Sorbent Tubes
For the passive sorbent tube sampling portion of this test program, EPA Method 325A/B
entitled “Volatile Organic Compounds from Fugitive and Area Sources” was followed for
both sampling and analysis methodology.
The study incorporated passive sampling for Benzene utilizing Carbopack X™ tubes. The
tube is a stainless steel net cylinder, with 100 mesh grid opening and 5.8 mm diameter,
packed with 530 ± 30 mg of activated charcoal with particle size 35-50 mesh. Volatile
organic compounds are trapped by adsorption. The tube is desorbed using a thermal
desorber and the extract is analyzed using GC/MS. Benzene concentrations are calculated
using the mass of each compound found, the validated Carbopack X™ uptake rates, time
sampled, and average field temperature.
Field-ready passive samplers were provided in a background-free cooler by Enthalpy
Analytical, LLC (Enthalpy) in Durham, North Carolina. Tubes are individually packaged
in individual sealed glass vials prevent protection against contamination. The cooler
included ice packs to keep the sampled tubes cool throughout the shipping process.
All Carbon Sorbent Tube field sampling followed the SOP provided in the Kerr-McGee
Air Monitoring Program.
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 8
SUMMA® Canister
For the summa canister sampling portion of this test program, EPA Compendium Method
TO-15 entitled “Determination of Volatile Organic Compounds (VOCs) in Air Collected
in Specially Prepared Canisters and Analyzed by Gas Chromatography/Mass Spectrometry
(GC/MS)” (“Method TO-15”) was followed for both sampling and analysis methodology.
Entech Instruments Silonite™ CS1200E Passive Canister Samplers were used to collect
samples over each 24-hour period. The Entech canisters used were six-liter stainless
canisters lined with ultra-inert surface coatings. The canisters were cleaned and blanked
for use according to laboratory standard operating procedures.
The canister samples were shipped to the Enthalpy laboratory where the samples were
analyzed for benzene, toluene, ethylbenzene, and xylenes.
All SUMMA® canister field sampling followed the SOP provided in the Kerr-McGee Air
Monitoring Program.
Phase of Operation and Activities During Reporting Period
In Appendix E is the operational activity during the reporting period.
Summary of Down Time or Equipment Malfunction
The PID Analyzers data recovery, which includes equipment malfunctions, during the
reporting period are shown in the table below.
The Post-monitoring bump test results for September were outside the range set forth in
the Quality Assurance Project Plan (QAPP) on the PID analyzers on the Southwest and
West side of the Well Pad (Location ID: T-13 and T-17). The procedures outlined in the
QAPP, which is part of the approved Kerr-McGee Air Monitoring Program, were
followed. A full three-point calibration was conducted on the unit and the analyzer was
thoroughly inspected. The equipment passed QA/QC checks and the bump test
demonstrated the units were still linear. The units seemed to have drifted more than is
typical over a one-month period, which is not unusual for monitors of this type. The data
collected on analyzers T13 and T-17 is considered valid, and the analytical data collected
during this reporting period does not indicate any abnormal site operations.
Summary of Investigations and Response
The Kerr-McGee Air Monitoring Program establishes Investigation Levels for the
continuous monitors and analytical results. If an Investigation Level is triggered, the
monitoring program outlines an Investigation Level Response for each level.
Location ID T-9 T-13 T-17 T-24
Data
Recovery
(%)
99.4% 99.4% 99.4% 99.4%
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 9
During this reporting period, there were no continuous monitor readings or analytical
results that exceeded an Investigation Level.
Investigation event responses, if applicable, can be found in Appendix F.
Investigation Level 3: No notifications to CDPHE and the local government with
jurisdiction over the location of the operations within forty-eight (48) hours of responsive
action(s) taken as a result of recorded values in excess of the Investigation Level 3 were
required.
Discussion of Results
The 15-minute block averages for the PID VOC results for all Production sampling can be
found in Figures 1 through 4. The data distribution for the PID VOC results can be found
in Table 1.
All 14-day Passive Tube results for can be found in Tables 2 through 4. All data analysis
All results in these tables are below the Health Guidance Values (HGVs) provided in
Section 11 of the HSE Air Monitoring Program.
Montrose was notified on September 21, 2021 by Enthalpy that a data recall had been made
on sets of carbon sorbent tubes analyzed during July and August. This recall was due to a
calibration gas concentration not being updated in the lab’s analysis spreadsheet. This
caused results to be under reported by up to 5%. This issue affected passive tubes collected
at TeVelde from 07/09/21 to 07/23/21 submitted in the July (017AA-008129-RT-31)
report. The updated results for these sampling periods can be found in Table 4. A signed
letter from Enthalpy’s Technical and QA Directors describing the issue and corrective
action can be found in appendix G.
Meteorological data for the reporting period can be found in the Figure 5.
Prepared by:
James Garrett
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 10
Summary of Results
Figure 1 – Te Velde 29-28HZ Southeast VOC Data
The graph below is shown for the PID Analyzer installed on the Southeast side of Te Velde 29-28HZ pad (Location ID: T-9) and is
plotted with 15-minute averages.
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 11
Figure 2 – Te Velde 29-28HZ Southwest VOC Data
The graph below is shown for the PID Analyzer installed on the Southwest side of Te Velde 29-28HZ pad (Location ID: T-13) and is
plotted with 15-minute averages.
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 12
Figure 3– Te Velde 29-28HZ West VOC Data
The graph below is shown for the PID Analyzer installed on the West side of Te Velde 29-28HZ pad (Location ID: T-17) and is plotted
with 15-minute averages.
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 13
Figure 4 – Te Velde 29-28HZ East VOC Data
The graph below is shown for the PID Analyzer installed on the East side of Te Velde 29-28HZ pad (Location ID: T-24) and is plotted
with 15-minute averages.
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 14
Table 1 – Te Velde VOC Data Analysis
The table below reports the data distribution for all PID Analyzers installed at the Te Velde
29-28HZ pad.
Location ID T-9 T-13 T-17 T-24
5th Percentile
Value (PPM) 0.12 0.12 0.11 0.00
25th
Percentile
Value (PPM)
0.17 0.17 0.18 0.17
50th
Percentile
Value (PPM)
0.22 0.21 0.24 0.22
75th
Percentile
Value (PPM)
0.26 0.29 0.29 0.29
95th
Percentile
Value (PPM)
0.32 0.41 0.37 0.40
Maximum
15-min
Average
(PPM)
0.56 0.66 0.49 0.55
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 15
Figure 5 – Te Velde 29-28HZ Meteorological Data
The wind rose below is shown for Te Velde 29-28HZ facility and is plotted with 15-minute
averages.
Te Velde 29-28HZ Wind Rose
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 16
Table 2 –Passive Sampling Results
The table below reports the results for all passive samplers and collocated PID analyzer
data averaged over the same time period the passive samplers were collected. Locations
IDs can be matched with their location on page 4.
Location
ID
Te Velde 29-28HZ
Passive
Sampler
Benzene (ppb)
Analyzer
VOC
(ppm) Start Date-Time End Date-Time
Acute:
HGV1 9 N/A N/A N/A
T9 0.383 0.16 8/20/2021_09:50 9/3/2021_10:06
T10 0.245 N/A 8/20/2021_09:55 9/3/2021_10:09
T11 0.281 N/A 8/20/2021_09:58 9/3/2021_10:12
T12 0.316 N/A 8/20/2021_10:00 9/3/2021_10:15
T13 0.227 0.25 8/20/2021_10:02 9/3/2021_10:18
T14 0.276 N/A 8/20/2021_10:04 9/3/2021_10:20
T15 0.428 N/A 8/20/2021_10:07 9/3/2021_10:22
T16 0.360 N/A 8/20/2021_10:10 9/3/2021_10:25
T17 0.300 0.24 8/20/2021_10:12 9/3/2021_10:28
T18 0.862 N/A 8/20/2021_10:15 9/3/2021_10:30
T19 0.977 N/A 8/20/2021_10:18 9/3/2021_10:33
T20 0.478 N/A 8/20/2021_10:22 9/3/2021_10:35
T21 0.387 N/A 8/20/2021_10:25 9/3/2021_10:38
T22 0.359 N/A 8/20/2021_10:28 9/3/2021_10:41
T23 0.258 N/A 8/20/2021_10:32 9/3/2021_10:44
T24 0.232 0.02 8/20/2021_10:34 9/3/2021_10:48
1 Health Guidance Values
Te Velde 29-28HZ Wind Rose 8/20/21-9/3/21
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 17
Table 3 –Passive Sampling Results
The table below reports the results for all passive samplers and collocated PID analyzer
data averaged over the same time period the passive samplers were collected. Locations
IDs can be matched with their location on page 4.
Location
ID
Te Velde 29-28HZ
Passive
Sampler
Benzene (ppb)
Analyzer
VOC
(ppm) Start Date-Time End Date-Time
Acute:
HGV1 9 N/A N/A N/A
T9 0.183 0.24 9/3/2021_10:30 9/16/2021_13:30
T10 0.178 N/A 9/3/2021_10:34 9/16/2021_13:35
T11 0.190 N/A 9/3/2021_10:37 9/16/2021_13:36
T12 0.189 N/A 9/3/2021_10:40 9/16/2021_13:37
T13 0.184 0.27 9/3/2021_10:43 9/16/2021_13:39
T14 0.191 N/A 9/3/2021_10:45 9/16/2021_13:42
T15 0.169 N/A 9/3/2021_10:48 9/16/2021_13:44
T16 0.173 N/A 9/3/2021_10:51 9/16/2021_13:46
T17 0.173 0.24 9/3/2021_10:53 9/16/2021_13:48
T18 0.187 N/A 9/3/2021_10:56 9/16/2021_13:55
T19 0.206 N/A 9/3/2021_10:59 9/16/2021_13:59
T20 0.208 N/A 9/3/2021_11:02 9/16/2021_14:02
T21 0.324 N/A 9/3/2021_11:06 9/16/2021_14:23
T22 0.189 N/A 9/3/2021_11:08 9/16/2021_14:26
T23 0.177 N/A 9/3/2021_11:11 9/16/2021_14:28
T24 0.181 0.25 9/3/2021_11:14 9/16/2021_14:30
1 Health Guidance Values
Te Velde 29-28HZ Wind Rose 9/3/21-9/16/21
Kerr-McGee Oil & Gas Onshore LP
Report ID: 017AA-008129-RT-65 Page 18
Table 4 –Revised Sampling Results
The table below reports the results for all passive samplers and collocated PID analyzer
data averaged over the same time period the passive samplers were collected. Locations
IDs can be matched with their location on page 7.
Location
ID
Te Velde 29-28HZ
Passive
Sampler
Benzene (ppb)
Analyzer
VOC
(ppm) Start Date-Time End Date-Time
Acute:
HGV1 9 N/A N/A N/A
T9 0.174 0.25 7/9/2021-14:49 7/23/2021-09:00
T13 0.172 0.27 7/9/2021-14:52 7/23/2021-09:10
T17 0.187 0.38 7/9/2021-14:55 7/23/2021-09:15
T24 0.168 0.15 7/9/2021-14:58 7/23/2021-09:25
1 Health Guidance Values
Te Velde 29-28HZ Wind Rose 7/9/21-7/23/21
Appendix A: Calibration and QA/QC Data
Linearity
Check Bottle
Value (PPM)
Actual Linearity
Check Monitor
Response
Baseline Match
Adjustment
(PPM)
Mid
Response
Error
Zero Span Zero Span Offset Gain Mid Mid (PPM)Offset Mid (25%)#1 #2 #3 #4 #5 #6 #7 Zero Mid Span Zero Mid Span Mid (25%)
5/13/2021 0.00 4.80 54.85 232.21 -54.85 0.0271 3.02 2.70 0.00 10.6%2.70 2.70 2.70 2.70 2.70 2.69 2.69 0.005 0.015 6/10/21 3.03 3.34 10.2%T-17 SPOD1069
5/13/2021 0.00 4.80 54.85 232.21 -54.85 0.0271 3.02 2.70 0.00 10.6%2.70 2.70 2.70 2.70 2.70 2.69 2.69 0.005 0.015 7/9/21 3.02 4.04 33.8%T-17 SPOD1069
7/9/2021 0.00 4.84 66.44 283.44 -66.44 0.0223 3.02 3.07 0.15 1.7%3.09 3.10 3.11 3.11 3.12 3.11 3.11 0.010 0.029 8/9/2021 2.99 2.86 4.3%T-17 SPOD1069
10/1/2021 0.00 4.89 77.61 209.6 -77.61 0.0370 2.96 2.77 0.60 13.9%2.75 2.75 2.76 2.77 2.78 2.79 2.79 0.017 0.05 10/1/2021 2.96 2.16 27.0%T-17 SPOD1069
Pre-Monitoring Post-Monitoring
Date
Bottle Value
Pre-
Monitoring
(mV)New
Post-Monitoring
(TVOC (PPM))
Location ID Unit ID
7-Iteration Mid Concentration Reading
for DL Calculation (PPM)
Std
Deviation
(PPM)
Detection Limit
as 3*SD (PPM)
(<0.05 PPM)Date
Bottle Value
Linearity
Check Bottle
Value (PPM)
Actual Linearity
Check Monitor
Response
Baseline Match
Adjustment
(PPM)
Mid Response
Error
Zero Span Zero Span Offset Gain Mid Mid (PPM)Offset Mid (25%)#1 #2 #3 #4 #5 #6 #7 Zero Mid Span Zero Mid Span Mid (25%)
5/13/2021 0.00 4.80 52.33 217.17 -52.33 0.0291 3.02 2.51 0.00 16.9%2.51 2.51 2.51 2.51 2.50 2.50 2.50 0.005 0.016 6/10/21 3.03 3.38 11.6%T-9 SPOD1065 Pass
5/13/2021 0.00 4.80 52.33 217.17 -52.33 0.0291 3.02 2.51 0.00 16.9%2.51 2.51 2.51 2.51 2.50 2.50 2.50 0.005 0.016 7/9/21 3.02 3.04 0.7%T-9 SPOD1065 Pass
5/13/2021 0.00 4.80 52.33 217.17 -52.33 0.0291 3.02 2.51 0.00 16.9%2.51 2.51 2.51 2.51 2.50 2.50 2.50 0.005 0.016 8/9/2021 2.99 3.12 4.3%T-9 SPOD1065 Pass
8/20/2021 0.00 4.84 57.43 321.5 -57.43 0.0183 2.98 2.78 0.00 6.7%2.8 2.8 2.8 2.8 2.8 2.8 2.8 0.008 0.024 9/3/2021 2.98 2.46 17.4%T-9 SPOD9003 Pass
10/1/2021 0.00 4.89 55.62 137.8 -55.62 0.06 2.96 2.74 -0.03 7.4%2.7 2.7 2.7 2.7 2.8 2.8 2.8 0.008 0.023 10/1/2021 2.96 2.41 18.6%T-9 SPOD9003 Pass
Pre-Monitoring Post-Monitoring
Date
Bottle Value
Pre-
Monitoring
(mV)New
Post-Monitoring
(TVOC (PPM))
Location ID Unit ID
MET Direction
Check, if applicable
(Pass/Fail)
7-Iteration Mid Concentration
Reading for DL Calculation (PPM)Std Deviation
(PPM)
Detection Limit
as 3*SD (PPM)
(<0.05 PPM)Date
Bottle Value
Linearity Check
Bottle Value
(PPM)
Actual Linearity
Check Monitor
Response
Baseline Match
Adjustment
(PPM)
Mid Response
Error
Zero Span Zero Span Offset Gain Mid Mid (PPM)Offset Mid (25%)#1 #2 #3 #4 #5 #6 #7 Zero Mid Span Zero Mid Span Mid (25%)
5/13/2021 0.00 4.80 54.36 248.32 -54.36 0.0247 3.02 2.40 0.00 20.5%2.39 2.40 2.40 2.40 2.40 2.41 2.41 0.007 0.021 6/10/21 3.03 2.68 11.6%T-13 SPOD1114
5/13/2021 0.00 4.80 54.36 248.32 -54.36 0.0247 3.02 2.40 0.00 20.5%2.39 2.40 2.40 2.40 2.40 2.41 2.41 0.007 0.021 7/9/21 3.02 2.88 4.6%T-13 SPOD1114
5/13/2021 0.00 4.80 54.36 248.32 -54.36 0.0247 3.02 2.40 0.00 20.5%2.39 2.40 2.40 2.40 2.40 2.41 2.41 0.007 0.021 8/9/2021 2.99 2.82 5.7%T-13 SPOD1114
5/13/2021 0.00 4.80 54.36 248.32 -54.36 0.0247 3.02 2.40 0.00 20.5%2.39 2.40 2.40 2.40 2.40 2.41 2.41 0.007 0.021 9/3/2021 2.98 2.54 14.8%T-13 SPOD1114
10/1/2021 0.00 4.887 63.29 207.46 -63.29 0.0339 2.96 2.79 0.00 5.7%2.79 2.79 2.79 2.79 2.79 2.79 2.79 0.000 0.000 10/1/2021 2.96 2.17 26.7%T-13 SPOD1114
Pre-Monitoring Post-Monitoring
Date
Bottle Value
Pre-
Monitoring
(mV)New
Post-Monitoring
(TVOC (PPM))
Location-ID Unit ID
7-Iteration Mid Concentration Reading
for DL Calculation (PPM)
Std Deviation
(PPM)
Detection Limit
as 3*SD (PPM)
(<0.05 PPM)Date
Bottle Value
Linearity
Check Bottle
Value (PPM)
Actual Linearity
Check Monitor
Response
Baseline Match
Adjustment
(PPM)
Mid
Response
Error
Zero Span Zero Span Offset Gain Mid Mid (PPM)Offset Mid (25%)#1 #2 #3 #4 #5 #6 #7 Zero Mid Span Zero Mid Span Mid (25%)
5/13/21 0.00 4.80 55.44 179.17 -55.44 0.0388 3.00 2.68 0.00 10.7%2.66 2.66 2.66 2.68 2.68 2.68 2.67 0.010 0.030 6/10/21 3.03 3.54 16.8%T-24 SPOD1060
6/9/21 0.00 4.84 57.48 260.95 -57.48 0.0238 3.02 2.80 0.00 7.3%2.80 2.80 2.80 2.80 2.80 2.80 2.80 0.000 0.000 7/9/21 3.02 2.88 4.6%T-24 SPOD1083
6/9/21 0.00 4.84 57.48 260.95 -57.48 0.0238 3.02 2.80 0.00 7.3%2.80 2.80 2.80 2.80 2.80 2.80 2.80 0.000 0.000 8/9/2021 2.99 2.47 17.4%T-24 SPOD1083
8/9/2021 0.00 4.84 64.12 216.5 -64.12 0.0318 2.99 3.15 0.00 5.4%3.17 3.15 3.15 3.15 3.15 3.15 3.15 0.008 0.023 9/3/2021 2.98 2.68 10.1%T-24 SPOD1083
10/1/2021 0.00 4.887 72.37 191.2 -72.37 0.0411 2.96 2.82 0.02 4.7%2.80 2.81 2.82 2.82 2.82 2.83 2.82 0.010 0.029 10/1/2021 2.96 2.51 15.2%T-24 SPOD1083
Pre-Monitoring Post-Monitoring
Date
Bottle Value
Pre-
Monitoring
(mV)New
Post-Monitoring
(TVOC (PPM))
Location ID Unit ID
7-Iteration Mid Concentration
Reading for DL Calculation (PPM)
Std
Deviation
(PPM)
Detection Limit
as 3*SD (PPM)
(<0.05 PPM)Date
Bottle Value
Appendix B: Field Data Sheets
Appendix C: Calibration Gas Certification Sheets
Appendix D: API and AIRS Numbers
Well API# Latitude Longitude
TE VELDE 28-1HZ
TE VELDE 28-3HZ
TE VELDE 28-6HZ
TE VELDE 28-7HZ
TE VELDE 28-9HZ
40.1156330
40.1010002
40.1009922
10.1009886
40.1009841
-104.8998650
-104.9025407
-104.8994831
-104.8985069
-104.8965758
0512350689
0512350697
0512350696
0512350694
0512350693
Te Velde 29-28HZ Pad Production Facility AIRS number 123A0D8001 for
the permanent water tanks.
Appendix E: Operations Activity
Te Velde 29-28HZ Pad
Operational Activity
Date Activity
9/1 – 3/2021 Completions
9/4– 30/2021 Production Monitoring
Appendix F: Investigation Level Event
Descriptions
No investigation level event occurred during this reporting period.
Appendix G: Enthalpy Notice Of Error
Enthalpy Analytical, LLC
800-1 Capitola Drive
Durham, NC 27713
WWW.ENTHALPY.COM Page 1 of 1
September 21, 2021
Montrose Air Quality Services
Attn: Austin Heitmann
990 W 43rd Ave
Denver, CO 80211
Subject: Notice of an Error in Reporting Results for Fenceline Monitoring Samples
Dear Austin,
You are receiving this notice because data for one or more of your projects may have been affected by an
error.
On August 18, 2021, while reviewing a new calibration curve, it was found that the concentration of the
calibration gas cylinder used to quantitate sample results was not properly updated. Further investigation
revealed that other instrument calibrations had been calculated using the incorrect calibration gas
concentration.
An internal investigation revealed two factors that contributed to the error. First, the calibration gas cylinder
was recently changed. The analyte concentrations in the new cylinder differed from the ones used previously.
In order to calculate the concentrations of the individual calibration levels, analysts use a validated
spreadsheet. A copy of the previous spreadsheet was used which included the previous calibration values
instead of the values associated with the new cylinder. Second, the calibration review did not include a
review of the concentrations included on the Certificate of Analysis (CoA) versus the concentrations included
in the calibration spreadsheet.
The immediate corrective action taken was to correct the calibration calculation spreadsheets, update the
instrument calibrations, and reprocess the data for affected client projects. Sample results changed,
exhibiting an increase of approximately 5%. A template of the calibration calculation spreadsheet has been
made which requires that analysts enter cylinder concentrations and other information each time of use. A
new calibration review checklist has been made that explicitly directs the analyst processing the calibration
and the QA reviewer to verify the concentrations of the calibration gas cylinder.
We apologize for any inconvenience this error may have caused. Please contact the Technical Director or
Quality Assurance Director using the contact information below with any questions or concerns.
Sincerely yours,
Thorne Gregory, Technical Director Clifford Baldridge, QA Director
Enthalpy Analytical, LLC Enthalpy Analytical, LLC
thorne.gregory@enthalpy.com cliff.baldridge@enthalpy.com
(919) 850-4392 (919) 850-4392
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