Page 1906 - trc_centennial_deir201705

5.20 Dry Utilities

Natural Gas
Natural Gas Demand

To determine the estimated natural gas demand from operation of the Project site, the
SoCalGas Engineering Department was consulted to determine the appropriate “rule of
thumb” load estimates for the various land uses on the Project site. Using these factors, it is
estimated that Centennial would demand approximately 30 million cubic feet (cf) per month
of natural gas, as shown in Table 5.20-2, SoCalGas Estimate of Centennial’s Monthly Natural
Gas Demand. This represents the total estimated demand per month from all types and
quantities of proposed land uses that would utilize natural gas, rather than peak demand,
which is used by SoCalGas as the basis of gas supply and infrastructure planning.

It should be noted that this estimate of natural gas demand is based on SoCalGas’ general-
use demand factors and does not take into account the current code requirements and
additional measures that would be implemented to increase energy efficiency (Green
Development Program).

As part of their planning process, SoCalGas forecasts future demand inclusive of the Project
and continues to provide the necessary energy resources for existing demands. Therefore,
SoCalGas has indicated that current supplies of monthly natural gas are sufficient to supply
the Project based on SoCalGas’ estimate of natural gas demand (SoCalGas 2006). However,
the realistic natural gas demand with planned energy efficiency features would be lower
than the appropriately conservative estimate prepared by SoCalGas as the basis of supply
and infrastructure planning. The extension of the additional main from the 33-inch
transmission main would parallel the existing medium-pressure main that exists within the
right-of-way of Gorman Post Road and SR-138. This tap would require an additional pressure
regulation station on an easement space (75 feet by 30 feet).

R:\Projects\PAS\CEN\000306\Draft EIR\5.20 Dry Utilities-051117.docx 5.20-18 Centennial Project
Draft EIR