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STEPHENS ENERGY CORP. - The Railroad Commission of Texas

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Gentlemen:<br />

Re: I11I)<br />

Openling Agreement<br />

Memuring Station #<br />

Freenone County, <strong>Texas</strong><br />

agmment ("Agreemml") is lo sd f0Rh lhc agmment between I<br />

.. ("Point Dcsipd"', and T N Gas Company ('TXU GAS'), conarninp gas<br />

qual~ty, routing. alloca~ion&a associated with gas sources deliwing into TXU GAS syrtem a thc<br />

Yuinl(s) <strong>of</strong>' Dclivcry lisled on the ntachcd Enhibit "A" (the "Receipt Poinl(s)"). Thc parlies l~rcla~<br />

mmize - thrl Point Dcsimcc delivers go6 - from vuioru well sourccs into mch Receipt Point metcr which<br />

--ires rhe perform-~~e~<strong>of</strong>y&us o~erotions. which may include, but uc not limi.tod to. musurcment<br />

<strong>of</strong> war - .. ~rrhcur=tml. tnnsvonatioa <strong>of</strong> gas and quality - . analysis by TXU GAS for Pod Designer. - thc<br />

snk <strong>of</strong> gas at 11be ~seipi ~ o imeter i to various mskcts. or th;do&marn pooling <strong>of</strong>gal.<br />

Effeclive October I, 2004, in order to clKify requkmcnls associated with vuious opentionu at<br />

the Rcceip Point. and in C~~ide~ti~n <strong>of</strong> the mulusl covenants ad agreements maiaed hmln. thc<br />

adcquuy and sufIiciency <strong>of</strong> which arc hereby acbowkdged, the parties hcmo agree as follows:<br />

I. Thc mlunl ps flowing Lhmugh thc Receipt Point into TXU GAS' systun must: (a) IK nf<br />

-Qualttv @) k con&rcially fm <strong>of</strong> dutr, gum, gum-forming wnrtitmts. p~)lmc.<br />

liquid hydnxrrhons. water a;d my other subflancc <strong>of</strong> any kind tha may become separated from tl~c<br />

gas 'luring t k hnndling th-f or that may cause injuy to or interference with p&pcr operation &,I'<br />

the lines, meters. reguhtors or other appliances through which it flows; (e) contain not more than %<br />

grain <strong>of</strong> hydrogen sulfde p a 100 cubic fcn <strong>of</strong> gas; (d) m ain not more than 5 grains <strong>of</strong> total vrlhr.<br />

including not more than 1 p in <strong>of</strong> macaptan sulfur, per 100 cuhie feet <strong>of</strong> gas (e) conlain not rnm<br />

[tun 2% by volumc <strong>of</strong> cubon dioxide; and contain not more than a total <strong>of</strong> 4% by volume <strong>of</strong> non-<br />

hydrocarbon gases; (0 conlain not more than 0.05% oxygen: (g) contain a lgou heating value <strong>of</strong> ;II<br />

lead 950 British Thnmd Units ("Btu") per cubic foot and not more than 1.100 Bfu per cubic fool: (h)<br />

contain rmc mar than 7 poundr <strong>of</strong> wata vapor pu million cubic feet <strong>of</strong> gas; (i) have a temperalure <strong>of</strong><br />

not nmre than 120 degrees Fahenheit, nor less than 40 degrees Fahrenheit; (i) have r hydmcarba<br />

dew point below 40 degrees Fabrcnheit at the delivery pressure; and (k) have an intcrchnngeabilily<br />

faclur (calculotcd by dividing uch Btu <strong>of</strong> gas, saluntd wllh water vapor al a tcmpsraturc nl' 0<br />

degrees Fahrenl~eit and a a plcsaure <strong>of</strong> 14.65 psi., by the square mot <strong>of</strong> the specific gravity <strong>of</strong>llle<br />

gas) ctut deviates no more than 7% from the interchangeability factor <strong>of</strong> the gas contained in 'TXU<br />

GAS' plpelinc nystcm at the Rcocipt Point. Notwilhstmndi& the foregoing, TXU GAS may waive<br />

Point Designee's uhligatims with reprd to maximum Bru content, hydrocarbon dew point and

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