March Prepared for: U.S. Army Environmental Command and U.S. Army Corps of Engineers Baltimore District

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1 FINAL Opertionl Rnge Assessment Progrm Phse I Qulittive Assessment Report, O hu, Hwi i U.S. Army Opertionl Rnge Assessment Progrm Qulittive Opertionl Rnge Assessments Prepred for: U.S. Army Environmentl Commnd nd U.S. Army Corps of Engineers Bltimore District Printed on recycled pper Mrch 2008 Finl Opertionl Rnge Assessment Progrm Phse I Qulittive Assessment Rnge Assessment Reports will be relesed beginning in Mrch 2008 per the Direction of Army Hedqurters. The cover pge of this Report reflects the officil finliztion dte. The dte on subsequent pges/figures reflects the dte upon which this document s conclusions re bsed.

2 EXECUTIVE SUMMARY The United Sttes (U.S.) Army is conducting qulittive ssessments t opertionl rnges to meet the requirements of Deprtment of Defense policy nd to support the U.S. Army Sustinble Rnge Progrm. The opertionl rnge qulittive ssessment (hereinfter referred to s Phse I Assessment) is the first phse of the U.S. Army Opertionl Rnge Assessment Progrm. This Phse I Assessment evlutes the opertionl rnge re t to ssess whether further investigtion is needed to determine if potentil munitions constituents of concern (MCOC) re or could be migrting off-rnge t levels tht my pose n uncceptble risk to humn helth or the environment. In conducting the Phse I Assessment, MCOC sources, potentil off-rnge migrtion pthwys, nd potentil off-rnge humn nd ecologicl receptors re evluted s pproprite. is comprised of pproximtely 360 cres of lnd locted within the Dimond Hed Stte Monument Prk, five miles northwest of downtown Honolulu. Bsed on the vilble Army Rnge Inventory Dtbse-Geodtbse (ARID-GEO) dt (dted 3 December 2005), consists of single pproximte 32-cre opertionl rnge. However, this re ppers to include two former smll rms firing rnges encompssing pproximtely 0 cres in size which were closed in the 960s nd re currently being remedited under the Defense Environmentl Restortion Progrm, Formerly Used Defense Sites (DERP-FUDS) ccording to the Comprehensive Environmentl Response, Compenstion, nd Libility Act. Due to the DERP-FUDS remedil ction t the two smll rms rnges, the 0 cres re excluded from the Opertionl Rnge Assessment Progrm (ORAP) ssessment. Therefore, the current opertionl rnge re t the instlltion is pproximtely 302 cres. The remining 58 cres ssocited with re considered non-opertionl use re. Throughout its history, hs been utilized by the militry for two min purposes: s costl defense bttery from 906 until pproximtely 950 by the U.S. Army, nd, for trining purposes by the Hwi i Army Ntionl Gurd (HIARNG) from 950 to present dy. Currently, Fort Ruger is lrgely prt of the Dimond Hed Stte Monument Prk nd is utilized for trining nd vrious dministrtive purposes by HIARNG. Additionlly, the instlltion is the home of the Joint Force Hedqurters-Hwi i. A review of vilble records nd bckground dt s well s interviews with instlltion personnel indicte tht the single rnge t hs never been used for trining involving militry munitions (live-fire or non-live-fire). Becuse trining ctivities do not involve, nd historiclly hve not involved, the use of militry munitions, there re no potentil sources of MCOC. Therefore, potentil off-rnge migrtion pthwys nd potentil off-rnge humn nd ecologicl receptors were not evluted, nd the rnge t is ctegorized s Unlikely. Instlltions with opertionl rnges where no munitions or only smll cliber blnks hve been utilized re ctegorized s Unlikely. Tht is, bsed on review of vilble informtion, there is sufficient evidence to show tht due to the lck of munitions use there re no known releses or source-receptor interctions tht could present n uncceptble risk to humn helth or the environment. Rnges ctegorized s Unlikely re required to be re-evluted t lest every five yers. Re-evlution my occur sooner if significnt chnges (e.g., chnge in rnge opertions or site conditions, regultory chnges) occur tht ffect determintions mde during this Phse I Assessment. Tble ES- summrizes the Phse I Assessment findings. ES-

3 Tble ES-: Summry of Findings nd Conclusions for Ctegory Unlikely Totl Number of Rnges nd Acrege Source(s) Pthwys(s) One opertionl rnge; 302 cres No source no current or historicl use of live-fire militry munitions Humn nd Ecologicl Receptors Not evluted (no source identified) Conclusions Re-evlute during the fiveyer review. ES-2

4 ABBREVIATIONS/ACRONYMS ARID-GEO CERCLA CSM DERP-FUDS DoD EPA HIARNG MCOC ORAP U.S. USACE Army Rnge Inventory Dtbse-Geodtbse Comprehensive Environmentl Response, Compenstion, nd Libility Act Conceptul Site Model Defense Environmentl Restortion Progrm Formerly Used Defense Sites Deprtment of Defense Environmentl Protection Agency Hwi i Army Ntionl Gurd Munitions Constituents of Concern Opertionl Rnge Assessment Progrm United Sttes United Sttes Army Corps of Engineers ii

5 O'hu 6 yll W N eh Ber et ni Kin g Kp io ln i no M o 5 o ct P r o s pe P lol op Oh u Nu u nu 6 U niversity sh Bi ie ol ho Sc 98 ih Lil lk K i ert Herb -H - Monsrrt Kuhio Bech Prk Klnin Kpiolni Prk Dimond Hed Bech Instlltion Boundry Opertionl Rnge Are Non-Opertionl Are Highwys Highwy Mjor Rod ole 72 Dimond Hed Memoril Prk d Dimo n d He Instlltion Dt 5 i k n Hu Pki Kil u e Luw i W 0 th 2t h u Former Smll Arms Rnges (totling pproximtely 0 cres) Al Prk Hydrology Rivers/Strems Qulittive Opertionl Rnge Phse I Assessment, O'hu, HI Figure 2- Generl Instlltion Loction nd Opertionl Rnge Are 0 Miles Dt Sources: ARID-GEO 24 Sept. 200 ESRI StreetMp USA, 2005 Dte: Prepred By: Mrch 2008 EA Engineering, Science, nd Technology Prepred For: U.S. Army Contrct Number: W92DR-05-D-0008