Markwest New Mexico, L. L. C.

Second Revised Volume No. 1

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Effective Date: 08/01/2008, Docket: RP08-409-000, Status: Effective

Original Sheet No. 111 Original Sheet No. 111 (b) By comparing deliveries made during the preceding period under similar delivery conditions when the equipment was registering accurately. 3.7 Measurement of Moisture Transporter may install on-line at the Delivery Point(s) the most accurate and reliable technology currently available at reasonable cost to continuously monitor the moisture content of the gas being delivered by Transporter. Moisture content monitoring equipment installed by Transporter, if any, will have the capacity for an alarm, which may be installed by Shipper, to inform Shipper whenever the moisture content of the gas being delivered to Shipper exceeds the maximum designated by the Tariff specifications referenced in Section 2.1. If Transporter does not install moisture monitoring equipment as permitted by this section, Shipper's moisture monitoring equipment located on-line at the Delivery Point(s) will be used to determine the moisture content of gas being delivered by Transporter, if that equipment has been properly installed and maintained and is registering correctly. Shipper will promptly notify Transporter if the moisture content of gas being delivered to Shipper exceeds the maximum designated by the Tariff specifications referenced in Section 2.1. 3.8 Measurement of Gross Calorific Heating Value, Carbon Dioxide, Oxygen, Nitrogen and Hydrogen Sulfide Transporter's gas chromatograph installed at the Receipt Points shall be used to measure the gross calorific heating value, carbon dioxide, oxygen and nitrogen levels in the gas stream. The standard for calculation of gross calorific heating value, specific gravity and compressibility of gas mixtures from compositional analysis shall be Gas Processors Association Standard No. 2172-84, as amended or supplemented from time to time. If Shipper accepts delivery of any gas that contains moisture in excess of the limit for dry gas designated by the specifications referenced in Section 2.1, as determined in accordance with Section 3.7, the gross calorific heating value will be adjusted to reflect the actual water vapor content of the gas accordingly for billing purposes.