Williams Natural Gas Company

Second Revised Volume No. 1

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Effective Date: 10/01/1993, Docket: RS92- 12-003, Status: Effective

Original Sheet No. 272 Original Sheet No. 272 : Superseded

GENERAL TERMS AND CONDITIONS

17. MEASUREMENT AND MEASURING EQUIPMENT (Cont'd)

WNG and Shipper shall design, install, operate and maintain their

respective measurement equipment in such a manner that pulsation

induced measurement error is minimized. Pulsation induced error shall

not exceed one quarter of one percent (0.25%) of square root error

(SRE) as measured at the orifice taps with a square root error

indicator (SREI) manufactured under a license from the Southern Gas

Association. Other equipment may be used to determine SRE if agreed

upon by both parties. WNG shall have the right to request a test of

the meter facility of Shipper, and Shipper shall have the right to

request a test of the meter facility of WNG at reasonable intervals,

no more often than once in thirty days. If SRE is found to exceed the

limit stated above, the party owning the orifice meter shall, at the

request of the other party, submit to the requesting party plans for

installation of pulsation suppression equipment within a thirty-day

period following such request, and shall install said equipment within

a reasonable period of time. If such plan is not submitted within the

thirty-day period, or equipment not installed within a reasonable

time, the requesting party shall have the option of shutting in the

delivery. Pulsation errors determined by use of the SREI are to be

used only for the purpose of indicating needed facility modification

and are not to be used for adjusting accounts.

Shippers, operators or producers shall not use any equipment, such as

an intermitter or timed motor operated or gas operated valve, the use

of which prevents WNG's measurement equipment from obtaining reliable

measurements. Upon request of WNG, use of such equipment shall be

discontinued or adjusted so as not to interfere with the proper

operation of WNG's measurement equipment.