Philippines - Northern Negros Geothermal Power Project : environmental impact statement (Vol. 1 of 6) : Environmental impact statement : executive summary

El 353 VOL. 1 NORTHERN NEGROS GEOTHER\A-L DEVELOPMENT PROJECT ENVIRONMENTAL IMPACT STATE\ENT (EXECUTIVE SUMMARY) Prepared for: - ;~ _______PNOC-E'NERGY' DEVELOPMENTT CORPORATION PNPC Complex, Me _itt Road, Fort Boniacio, Mak.ati, etro .auila PO. Box 1031 M\4CP0 The E nre ' Compzny Pr_partd by: CON-SO LIDATED A ~STA2N(SYSTE-MS DENVELOPMENF'T.IC Ith F-ir. Mont-pino Bldg. -zmboa., Cor. Adtiznado X . I-s. pi Vilizp.i va1t \,*to -*-aia January' 1995  EXECUTIVE SUMMARY' PROJECT STATEMENT 1. The project is identified as follows: NAME OF PROJECT : NORTHERN NEGROS GEOTHERMAL DEVELOPMENT PROJECT (NNGDP) PROJECT PROPONENT : PHILIPPINE NATIONAL OIL COMPANY ENERGY DEVELOPMENT CORPORATION (PNOC-EDC) PNOC-EDC is a subsidiary of the PNOC group of companies whose corporate mission is the discovery, exploration, development and utilization of alternative energy sources which are indigenous, cost-effective and environmentally friendly. 2. The Company is currently operating geothermal projects in Tongonan, Leyte; Palinpinon in Negros Oriental; and Bacon-Manito in Albay. In addition, the company is now developing the Mt. Apo (Davao and North Cotabato) and Mt. Labo (Camarines Sur) geothermal projects. Further development works are also ongoing in the above mentioned operating geothermal power projects to expand their capacities. 3. The Project involves the development of a geothermal field in Northern Negros to generate 80 MW of power. Development work shall include various civil works (access and internal roads, wellpads, sumps, spoil disposal areas and other facilities); drilling and testing of production and reinjection wells; construction and installation of the fluid collection and disposal systems (FCDS), constrMction of power plant, and operation and maintenance of these facilities.  GEOTHERMAL ENERGY 4. Geothermal energy is energy derived from the heat of the earth's crust. Ground water percolates down, 2-3 km from the surface, to an earth's layer of permeable zone or porous rock l .which serves as a water/steam reservoir. This is heated through convection by a hot layer of bedrock which in turn is heated by magmatic intrusions further below. This phenomenon is illustrated in FIGURES A and B. 5. The energy from the reservoir is tapped by drilling wells and directly extracting the steam/hot water. When the pressure (and temperature) is high enough, the steam (water separated) can be used to drive steam turbines for power generation, otherwise it can be used for various heating applications (see FIGURE C). 6. Geothermal energy has been utilized commercially for power generation in the Philippines since 1974 when the first plant at Tiwi, Albay was commissioned. At present, a total of 1044 MW of geothermal poweris installed at various locations. An additional 1673 MW generating ' capacity is planned to be established by the year 2005 including this project. PROJECT RATIONALE 7. In prioritizing energy development projects, different factors are taken into account: These are economics, fuel diversity, security, price volatility, lead time for development and environmental externalities. Taking all of these into account, geothermal power has become one of the priorities in the National Power Development Plan. Specifically, the project (NNGDP) is being pursued for the following reasons:- To supply an additional 80 MW power in the Visayas grid which in 1997 (projected commissioning) will amount to more than five percent (5%) of the arid capacity and thus help meet the expected increase in energy demand of the region. 11~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  / ghk64 iG +hai comeQv from Cooled, an outer cru-s+ -6rrc)o- 1%X>^f9El coe Ai VI ~W moIe a rook r\ *ey Allaf llen D pk Was lef between, *Q crust ; 8ndco rQA6 1-sIowlycoinhnuesQ z, , 1v-coI, the nb frnais i-eat 's transferre4 0 H)te raci-y crust . above. This het is called geotwrmIal eQQrgy. oaf gecotermal errgl include: Mwn > z~~r as 6va J|| -stearn fro wi+h' >V the crust surfacas NORTXEEN NEGROS GXOTIERMAL POWER ITTI: DEVELOPMET PROJECT ' F SUDY A CONSOLIDATED ASIAN GEOTHERMAL a SYSTEMS DEVELOPMENT INC  STEAtfl /HOT IrP- ~j cthof Cpr1ngS ..9a9SOI. i T16 $2^r/w~~~~~~~~~~OTw KIAT P ! +~~~~~~~ NORTHEN NE_OBOS GEOTHERUAL POWER TiTLE: DEJVELOP!MT PRO SCHEMATIC CROSS-SECTnON OF B rn* ~~~~GEOTHERMAL SYSTEM I____ CONSOLIDATED ASIAN (NOT DRAWN TO SCALE) SYSTEms DEVELOPMENT INC  _)-