HomeMy WebLinkAboutIR 9379INFORMAL REPORT TO CITY COUNCIL MEMBERS
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To the Mayor and Members of the City Council
No. 9379
May 10, 2011
Page 1 of 2
SUBJECT: UPDATE ON TEXAS COMMISSION ON ENVIRONMENTAL
QUALITY COMPLIANCE INVESTIGATIONS AT PAD SITES
REPORTED WITH HIGH EMISSIONS WITHIN THE NATURAL GAS
AIR QUALITY STUDY — INTERIM REPORT PREPARED BY
EASTERN RESEARCH GROUP, INC.
The purpose of this Informal Report is to provide an update regarding the Texas Commission on
Environmental Quality compliance investigations at the pad sites reported with higher emissions
in the Natural Gas Air Quality Study (NGAQS) — Interim Report prepared by Eastern Research
Group, Inc (ERG).
The Interim Report identified two pad sites with higher point source emissions: 2299 Mercado
Drive and 11398 West Freeway. The emission data for the 2299 Mercado Drive site was later
corrected from over 100 tons of Volatile Organic Compounds (VOC) per year to less than'/ ton
of VOC per year because of a calculation error but this correction came after TCEQ initiated their
compliance investigation. Additionally, the 11398 West Freeway site was flagged in the Natural
Gas Air Quality Study - Interim Report because site emissions were estimated using a canister
from a tank emission point only. Identified emissions at 11398 West Freeway could vary in
chemical composition between non -tank related and tank related emissions, thus changing the
overall site emission concentration.
The Texas Commission on Environmental Quality (TCEQ) has completed their compliance
investigation reports for both originally reported high emission sites. TCEQ reviewed data
collected as part of their own emissions inventory, by Eastern Research Group, Inc., by the
operators, and by TCEQ field inspectors. Based on a review of all of these data, TCEQ has
concluded that emissions from both sites are below the 25 tons per year of VOC. The 25 tons of
VOC per year is the threshold for qualifying for Permit by Rule (PBR) or lowest level of air permit.
At both sites TCEQ concluded that no
violations were evident as a result of
the compliance investigations.
However, at the 2299 Mercado Drive
site TCEQ has recommended periodic
monitoring to further assess the fact
that downwind canister sample results
showed levels of benzene were
exceeding the long -term Air Monitoring
Comparison Values. The benzene
results did not exceed the short -term
Air Monitoring Comparison Values. No
such additional monitoring was
recommended for the 11398 West
Freeway site.
ISSUED BY THE CITY MANAGER
FORT WORTH, TEXAS
1 9379 01�
i INFORMAL REPORT TO CITY COUNCIL MEMBERS No.
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To the Mayor and Members of the City Council
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SUBJECT: UPDATE ON TEXAS COMMISSION ON ENVIRONI`R&1�-��
QUALITY COMPLIANCE INVESTIGATIONS AT PAD SITES
REPORTED WITH HIGH EMISSIONS WITHIN THE NATURAL GAS
AIR QUALITY STUDY — INTERIM REPORT PREPARED BY
EASTERN RESEARCH GROUP, INC.
Eastern Research Group, Inc. (ERG) also completed revisits on each site around the same time
period that TCEQ was performing their Compliance Investigation. The results from their revisits
will be included in the Final Report.
ERG is currently performing data analysis in preparation for the Final Report, such as finalizing
Point Source Emission data and modeling. The Natural Gas Air Quality Study - Final Report is
due to the City on June 30, 2011.
Please refer any questions to Michael A. Gange, Assistant Director of TPW — Environmental
Services Division at extension 6569.
Tom HHiggin
Interim City Manager
ISSUED BY THE CITY MANAGER FORT WORTH, TEXAS