On Friday Transco became the most recent pipeline to take action against positive imbalances threatening its system integrity. Starting Saturday and until further notice, Transco said it would not allow any due-pipeline imbalance make-up nominations or excess storage injections, and no incremental parked gas or return of loaned gas would be accommodated.
As it had earlier said might be possible (see Daily GPI, Oct. 13), Pacific Gas and Electric‘s California Gas Transmission (CGT) system issued its first “asymmetrical” high/low-inventory OFO for Saturday’s gas day. The string of OFOs since early July has been symmetrical, with the tolerance band and noncompliance charge on the high-inventory side the same as those on the low-inventory side. But with new functionality in its NSIDEtracc system, CGT now has the technological capability of calling asymmetrical high/low OFOs when pipeline conditions allow. Saturday’s OFOs would both be systemwide and Stage 1, carrying identical noncompliance penalties of 25 cents/Dth. But while the low-inventory order would retain the usual 15% tolerance for negative daily imbalances, the high-inventory OFO carried a 10% tolerance for positive daily imbalances.
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