13. QUALITY OF GAS
Dominion Energy Questar Pipeline, LLC Pt. 1 General Terms and Conditions Sec. 13.1
FERC Gas Tariff Specifications
Second Revised Volume No. 1 Section Version: 0.0.0
Filed On: August 31, 2010 Effective On: August 31, 2010
13.1 Specifications. The gas received by Questar from shipper and delivered by Questar to
shipper shall conform to the following specifications:
(a) Heat Content. The gas delivered at each of the points of receipt and delivery
shall contain a gross heating value of not less than 950 Btu per cubic foot nor
more than 1150 Btu per cubic foot.
(b) Hydrogen Sulfide. The gas shall not contain more than 1/4 grain of hydrogen
sulfide per 100 cubic feet.
(c) Inert Substances. The gas shall not contain inert substances in excess of three
percent by volume.
(d) Liquids. Gas tendered for transportation at a receipt point shall not contain any
free liquids of any nature and shall conform to the CHDP specification set forth in
§§ 13.2 and 13.3.
(e) Merchantability. The gas shall be commercially free from dust, gums, gumforming
constituents, dirt, impurities or other solid or liquid matter that might
interfere with its merchantability or cause injury to or interference with proper
operation of the pipelines, regulators, meters, or other equipment of Questar.
The gas shall also be free of all matter that is deemed hazardous or toxic and is
subject to regulation by the Environmental Protection Agency or any State
agency having similar jurisdiction or authority.
(f) Oxygen. The gas shall not have an oxygen content in excess of 10 parts per
million by volume, and the parties shall make every reasonable effort to keep the
gas free of oxygen.
(g) Temperature. The gas shall be delivered at a temperature not in excess of 120
degrees Fahrenheit or less than 35 degrees Fahrenheit at any receipt or delivery
point.
(h) Total Sulfur. The gas shall not contain more than 5 grains of total sulfur per Mcf,
of which not more than 2 grains shall be mercaptan sulfur.
(i) Water Vapor. The gas shall not contain in excess of 5 pounds of water per million
cubic feet.
Dominion Energy Questar Pipeline, LLC Pt. 1 General Terms and Conditions Sec. 13.2
FERC Gas Tariff Cricondentherm Hydrocarbon Dew Point (CHDP)
Second Revised Volume No. 1 Section Version: 2.0.0
Filed On: December 24, 2015 Effective On: January 25, 2016
13.2 Cricondentherm Hydrocarbon Dew Point (CHDP).
(a) CHDP Limit - Questar will accept all deliveries of natural gas within CHDP Zones 1
through 9 and Zone 11 at a CHDP equal to or less than 35° Fahrenheit, and equal
to or less than 15° Fahrenheit within CHDP Zone 10, provided that such gas
satisfies all other applicable provisions of Questar's FERC Gas Tariff.
(b) Questar will file with the Commission any proposed revisions to change the CHDP
Limit of any CHDP Zone. Upon Commission approval of such revisions, Questar
will revise the CHDP Limits for the specified zone on the CHDP Zone Map report
under Informational Postings > Gas Quality.
(c) CHDP Operating Limit - Questar may, from time to time, as operationally
feasible, establish a CHDP Operating Limit that is higher than the CHDP Limit for
natural gas received into its system on specified CHDP Zones. Questar's ability
to establish higher CHDP Operating Limits for particular zones will depend on
pipeline operating characteristics such as pressures and temperatures, blending
capability of prevailing and expected gas supplies and proximity to downstream
city gates and interconnecting pipelines as well as the existence of processing
and liquids handling facilities within a CHDP Zone. In such cases when Questar
increases a zone’s CHDP Operating Limit, Questar will update the CHDP Operating
Limit for the specified zone on the CHDP Zone Map report under Informational
Postings > Gas Quality, on its internet web site.
(d) Questar shall not be obligated to accept gas into its system that exceeds the
applicable CHDP limit. The existence of a CHDP limit shall not be deemed to
negate, reduce or limit Questar's authority to issue operational flow orders. To
the extent operationally practicable, Questar may waive a CHDP limit for gas
received from certain points on its system provided such waiver is made on a
non-discriminatory basis.
(e) When operationally feasible, Questar will exempt low-volume sources from the
CHDP Operating Limit on a non-discriminatory basis and accept gas into its
system that exceeds the posted CHDP Operating Limits stated on the CHDP Zone
Map report under Informational Postings > Gas Quality. Sources with volumes of
less than 100 Dth/d will generally be exempt from the CHDP Limits. However,
whenever multiple low-volume sources converge to cause Questar problems in
meeting downstream CHDP requirements, Questar may elect to temporarily
suspend the exemption for low-volume sources on localized portions of its system
until the downstream CHDP problems are resolved. In such cases, Questar will
post a system-wide notice whenever it elects to temporarily suspend the
exemption for low-volume sources.
Dominion Energy Questar Pipeline, LLC Pt. 1 General Terms and Conditions Sec. 13.3
FERC Gas Tariff CHDP Operating Limit Posting Procedure
Second Revised Volume No. 1 Section Version: 1.0.0
Filed On: December 24, 2015 Effective On: January 25, 2016
13.3 CHDP Operating Limit Posting Procedure.
(a) Questar may establish a CHDP Operating Limit at or above the CHDP Limit for
each CHDP zone. The CHDP Operating Limit will apply to all receipt points within
the CHDP zone. Questar will update its CHDP Operating Limit for the specified
zone(s) as stated on the CHDP Zone Map report under Informational Postings >
Gas Quality, each time it establishes a higher CHDP Operating Limit. Questar will
provide as much prior notice of changes to its CHDP Operating Limits as possible
and attempt to provide at least two days’ notice prior to the timely cycle
nomination deadline when its CHDP Limit is reduced. However, Questar may
reduce the CHDP Operating Limit to the CHDP Limit at any time without notice,
when operationally necessary. In such event, Questar will post a system-wide
critical notice updating the CHDP Operating Limit of the specified zone on the
CHDP Zone Map report under Informational Postings > Gas Quality, on its
Internet web site.
(b) For receipt points with online chromatographs, Questar's Gas Quality report
under Informational Postings shall provide the prior Gas Day average and
maximum calculated CHDP at each receipt point. For receipt points without
online chromatographs, the Gas Quality report shall provide the average CHDP at
each receipt point for the prior month period. Compliance with CHDP limits will
be determined based on calculated current flowing CHDP temperatures.
Dominion Energy Questar Pipeline, LLC Pt. 1 General Terms and Conditions Sec. 13.4
FERC Gas Tariff CHDP Calculation
Second Revised Volume No. 1 Section Version: 0.0.0
Filed On: August 31, 2010 Effective On: August 31, 2010
13.4 CHDP Calculation. Questar shall perform the CHDP calculations using an industry
recognized equation of state and natural gas chromatograph compositional analysis
through C9. In the event of a dispute over calculated CHDP temperature at a given
receipt point, Questar's calculated value shall control unless the disputing party can
clearly identify the cause of the error.
Dominion Energy Questar Pipeline, LLC Pt. 1 General Terms and Conditions Sec. 13.5
FERC Gas Tariff Acceptance of Gas
Second Revised Volume No. 1 Section Version: 0.0.0
Filed On: August 31, 2010 Effective On: August 31, 2010
13.5 Acceptance of Gas. If any gas tendered for receipt by Questar fails at any time to
conform to any of the quality specifications set forth in §§ 13.1 through 13.3, Questar
may refuse to accept receipt of the non-conforming gas until the gas meets the quality
specifications. Questar's refusal to accept non-specification gas does not relieve
shipper of any of its obligations under this tariff. Questar will attempt to notify a
shipper when shipper's gas does not conform to Questar's specifications.
Dominion Energy Questar Pipeline, LLC Pt. 1 General Terms and Conditions Sec. 13.6
FERC Gas Tariff Indemnity
Second Revised Volume No. 1 Section Version: 0.0.0
Filed On: August 31, 2010 Effective On: August 31, 2010
13.6 Indemnity. Shipper shall indemnify Questar and hold it harmless from all suits,
actions, regulatory proceedings, damages, costs, losses and expenses (including
reasonable attorney fees) arising out of the failure of the gas tendered by shipper to
conform to the quality specifications set forth in §§ 13.1 through 13.3, including any
injury or damage done to Questar's facilities. Questar may elect to accept any offspecification
gas in the quantities and at the time periods as Questar determines will
not adversely affect or hamper Questar's ability to provide service under this tariff.
Dominion Energy Questar Pipeline, LLC Pt. 1 General Terms and Conditions Sec. 13.7
FERC Gas Tariff Waiver
Second Revised Volume No. 1 Section Version: 0.0.0
Filed On: August 31, 2010 Effective On: August 31, 2010
13.7 Waiver. Acceptance of gas that does not conform to these specifications is at the
election of Questar, and acceptance of the gas does not constitute any waiver of
Questar's right to refuse to accept similarly nonconforming gas.
Dominion Energy Questar Pipeline, LLC Pt. 1 General Terms and Conditions Sec. 13.8
FERC Gas Tariff Scheduling
Second Revised Volume No. 1 Section Version: 0.0.0
Filed On: August 31, 2010 Effective On: August 31, 2010
13.8 Scheduling. Questar will not be required to accept gas at any point of receipt that is of
a quality inferior to that required