# Encina Power Plant Fuel Use

Tom W. Andrews t

o

: Shaheerah Kelly 03/12/2010 04:25 PM

Cc: "Tom W. Andrews"



# Ms. Kelly:

In response to the recent request by the EPA, the enclosed graph along with the corresponding data

summary tables show the fuel use for the Encina Power Plant Units 1

‐ 5 during the period from 1997 to

2008. Since Encina Units 4&5 are more efficient than Encina Units 1

‐ 3, these units are dispatched

sooner, and more often, than Units 1

‐ 3. But if Units 4&5 are already running, then Units 1

‐ 3 are brought

on line as well to meet peak demand. The data shows that total Encina Power Plant generation drops as

new generation is brought on line in the San Diego area, but the operation of the Encina Power Plant

quickly recovers as demand for electricity in the San Diego area continues to grow. So far, there has

been enough new generation coming on line in the San Diego area such that Encina Units 4&5 have been

able to handle most of the growth over the past few years (i.e., 2006 to 2008). This has resulted in the

lower operation of Encina Units 1

‐ 3 during this same period. However, as discussed in our March 1,

2010 letter to the EPA, this situation can’t go on forever, and we expect an increase in the future

operation of Encina Units 1

‐ 3 due to the increase in electrical consumption in the San Diego area and the

increasing challenges in siting new generating resources, or transmission lines, to support this region.

Consequently, we continue to believe that the period from 2002 to 2006 is the most representative for

calculating the actual emissions for Encina Units 1

‐ 3. Please let us know if you have any questions or

need any additional information.FuelUsedfortheEncinaPowerPlantUnits1‐5199711998219993200042001520026200362004620056200662007720087Unit1 1,323.41,632.2 622.7 2,784.9 3,712.2 1,640.01,275.9 1,734.3 1,661.7 551.8 685.0 89.0Unit2 1,306.5 1,890.01,492.3 2,941.6 3,941.9 2,060.8 1,673.02,510.7 1,823.7 1,070.4520.0 450.0Unit3 2,392.9 3,307.8 2,870.2 4,848.3 5,023.5 2,145.8 2,393.43,805.02,107.8 1,319.2 879.0 742.0Unit4 8,622.6 12,480.011,621.7 12,484.1 16,295.89,500.09,919.013,593.09,145.05,895.02,604.03,599.0Unit5 12,177.5 12,218.015,151.412,569.012,972.5 10,893.011,452.012,711.06,398.06,295.03,989.07,215.0Total 25,823.031,528.031,758.435,627.9 41,945.9 26,239.626,713.434,354.021,136.2 15,131.48,677.012,095.0Note:1.1997EmissionInventoryReportforEncinaPlant,preparedbySanDiegoAirPollutionControlDistrict,4/1/1999.2.1998EmissionInventoryReportforEncinaPlant,preparedbySanDiegoAirPollutionControlDistrict.3.1999EmissionInventoryReportforEncinaPlant,preparedbySanDiegoAirPollutionControlDistrict,8/4/2000.4.2000EmissionInventoryReportforEncinaPlant,preparedbySanDiegoAirPollutionControlDistrict,2/13/2002.5.2001RevisedEmissionInventoryReportforEncinaPlant,preparedbySanDiegoAirPollutionControlDistrict,4/22/2004.6.ForUnits1,2,3:FuelusedbasedonactualemissioncalculationsintheSDAPCD'sFinalDeterminationofCompliance,CarlsbadEnergyCenterProject,ApplicationsNumber985745,985747,and985748,8/4/2009.ForUnits4and5:FuelusebasedontheDataResponsetotheCenterforBiologicalDiversityregardingtheCECP,(ResponsetoDataRequestsA1throughG1),TABLEDRE3‐1,p.10,Jan2009.7.BasedontheDataResponsetotheCenterforBiologicalDiversityregardingtheCECP,(ResponsetoDataRequestsA1throughG1),TABLEDRC3‐1,p.8,Jan2009.NaturalGas(mmscf/year)

# Fuel Use Summary Encina Power Plant

0 5,000 10,000 15,000 20,000 25,000 30,000

0 10,000 20,000 30,000 40,000 50,000 60,000

1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008ElectricityConsumption(GWh)NaturalGas(mmscf/year)



# Year Unit 1

Unit 2

Unit 3

Unit 4

Unit 5

Electricity Consumption (GWh)

Projects Online Wildflower Power Plant

Escondido Power Plant

Border Power Plant

Palomar Power PlantAnnualElectricityConsumptioninSanDiegoCounty(1997‐2008)11997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008TotalElectricityConsumption(GWh)217,082.0 17,630.0 18,312.0 19,294.3 17,826.1 18,270.0 18,976.5 19,921.2 19,930.3 20,879.5 21,041.4 21,407.3Notes:1.SDG&EdataobtainedfromCaliforniaEnergyDemand2010‐2020AdoptedForecast,CommissionReport,Chapter4,Dec2009,CEC‐200‐2009‐012‐CMFFullReportURL:http://www.energy.ca.gov/2009publications/CEC‐200‐2009‐012/CEC‐200‐2009‐012‐CMF.PDF2.CaliforniaEnergyDemand2010‐2020AdoptedForecast,CommissionReport,Chapter4,p.145,Dec2009,CEC‐200‐2009‐012‐CMFForm1.1‐SDG&EPlanningAreaCaliforniaEnergyDemand2010‐2020StaffRevisedForecastElectricityConsumptionbySector(GWh)