SOURCE USE APPLICATION
for
OOKALA WELL #6017-05 .. -'
OOKALA, HAWAII
DEP ARTMENT OF WATER SUPPLY COUNTY of HAWAII
Consulting Engineers SSFM ENGINEERS, INC. October 1995 TABLE OF CONTENTS
I. GENERAL INFORMATION ...... 1 A. Introduction ...... 1 B. Background and Funding...... 1 C. Project Description...... 1
II. PHYSICAL AND HYDROLOGICAL CHARACTERISTICS OF AREA ...... 2 A. Climate ...... 2 B. Topography, Geology and Foundation Conditions ...... 2 C. Groundwater Conditions ...... 2 D. Flood Problems ...... ~...... 2 E. Conformance with Land Use and Zoning Regulations ...... 2 F. Water Development and Future Use ...... 3
III. DESIGN CONSIDERATIONS ...... 3 A. Exploratory Well ...... 3 B. Site Work...... 3 C. Environmental Issues ...... 3
IV. POTENTIAL SOURCES OF CONTAMINATION ...... 4 A. Potential Manmade Sources of Contamination ...... 4 B. Potential Natural Sources of Contamination ...... 4
V. COST OF CONSTRUCTION AND SCHEDULING...... 4 A. Cost of Construction ...... 4 B. Scheduling ...... 4
VI. TREATMENT ...... 4
VII. FIGURES Figure 1 Location Map Figure 2 Vicinity Map Figure 3 Site Plan Figure 4 Well Section
Table 1 Drawdown Pump Test Table of Contents Page 2
VIII. REFERENCES * "Soil Survey of the Island of Hawaii, State of Hawaii," US Department of Agriculture, SCS Dec. 1973. * Topographic Surveys of the Project Area by Island Survey, Inc., March 14, 1994. * Tom Nance Water Resources Engineering "Pump Test Results for the Ookala Exploratory Well, State No. 6017-05," June 1995.
IX. APPENDICES * Five Day Test Logs * Laboratory Test Analyses. •
OOKALA WELL #6017-05
I. GENERAL INFORMATION
A. Introduction
The New Ookala Well is proposed to replace the deteriorated existing inclined shaft, water tunnel and pump system. The intent of the project is to find a new water source to provide water service and fire flow to the Old Dispensary area, the Boarding House area, the Store Camp area, the Ookala Skilled area, the Kukui Village, the Nui Village and the Milo Village. The process required drilling, casing and testing of the well for ground water quality and yield. The quality and quantity of groundwater tested in June 1995, are included in the Appendices. Upon approval of the State Health Department, the test well will be converted into a production well.
The new production well will be owned and operated by the Department of Water Supply, County of Hawaii. The well is located southwest of the Kaula Gulch, north of the Hawaii Belt Road and east of the existing rectangular concrete reservoir in Ookala. The water, drawn from the New Ookala Well, will be pumped to the existing rectangular concrete reservoir then distributed to the villages through existing pipe network.
The New Ookala Exploratory Well consists of 640 linear feet of 12 inches well casing and approximately 60 linear feet of 12 inches standard perforated casing. The well was continuously pump tested from June 12 to 15, 1995 at a rate of nearly 500 gpm.
The construction cost for the New Ookala Exploratory Well was approximately $425,000.
B. Background and Funding
The project is authorized and being funded by the Department of Water Supply, County of Hawaii, JOB NO. 93-580 OOKALA EXPLORATORY WELL DRILLING. The project location and vicinity maps are shown on Figures I and II, respectively.
c. Project Description
The project involves drilling, testing and constructing a new production well, in accordance with Department of Water Supply, County of Hawaii standards. The water, drawn from the new well will be pumped to the existing concrete reservoir. The New Ookala Well will be designed to handle the demands of the villages and its fire flow of 500 GPM for 2 hours.
Page 1 A ~---,-PROJECT LOCATION N
HAWAII>
-- _... _--- ._------.--- ,------>--
LOCATION MAP
SCALE 1: 1 ,500,000
FIGURE I The existing inclined shaft water supply source will remain in service during the construction period and will probably be abandoned after completion of a successful production well and pumping system.
II. PHYSICAL AND HYDROLOGICAL CHARACTERISTICS OF AREA
A. Climate
The climate in this area is moderately wet, which is typical of the Hamakua coast with rainfall of over 100 inches per year, and as much as 194 inches in two recent, prevIous years.
B. Topography, Geology and Foundation Conditions
The site is an abandoned sugar cane field with a gentle average slope of approximately 20%. This area is on the eastern slopes of Mauna Kea. The geological formation appears to be the Hamakua Volcanic Series capped by Pahala ash. It appears very stable since the immediately adjacent highway deep cut section is nearly vertical.
The existing reinforced concrete storage tank was built adjacent to the highway right of-way. The existing water storage tank apparently was designed to withstand Zone III earthquakes. Likewise, the small control building shall be designed to meet this requirement.
C. Groundwater Conditions
The groundwater (basal lens) was found to be at approximate elevation 7.5 ft. above mean sea level, with a low salinity of 11 mg/I. The drawdown at 500 gpm indicated only about 1.5 feet, with excellent recovery within 20 minutes.
D. Flood Problems
The well site is at elevation 640 ft. above msl and is over 3000 feet from the coastline. The topography is such that no ponding or flooding can occur on this site due to the natural slope toward the coastline.
E. Conformance with Land Use and Zoning Regulations
The Ookala Well site is located in a Hawaii County Planing Department designated RS-lO.The State Land Use Commission has designated the Ookala Well site for urban use. This well site is consistent with the existing zoning and land use.
Page 2 1a eoen 0 z"ol!. • III 0>(fJ o';T -"Ill ";'I;:t o -" ' .. .~" -',
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SITE PLAN
OOKALA WELL Figure 3
SSFH Engineers, August. 1995 Inc. Not to Scale 1/4 IN STEEL PLATE WELDED TO CASING z -to ;-EXISTING GROUND ,--l ELEV. 640.7 FT IFilt ;. 11-111- l(dJl~
<
: 620 FT OF GROUTED " .~ ANNULAR SPACE - :·1 ry J.-'
J\ .-. ::.1 :.: L.I.. ." .- Q -;". '. ~ (C .. .. '.- : : ". 12 IN ID x 5/16 IN WALL ~ :". z '. THICKNESS CASING en- .'. c::t: (.') c 18 IN DIAMETER BORE HOLE f- -J- 1.1... 0 0.. ) I.IJ 9 ~ c 'J t ..J I ct .' f- ~ 0 +- " AVERAGE WATER LEVEL f- t- b I~ LI.. \1 .. '. ELEV.: ± 7.5 FT (MSL) Lt') - ,....; en :;:) -J ::;:) (. Z c" z Z l;- I>- c::t: -en ~ IV it: c::t: :x: N (.') (.') c::t: C ~ Q. t; UJ t- ..J t- u. UJ c::t: t, it: y > c:: 0 c::t: 0 c:: U. _____A_S_-BUILT,~~NE 1995 FIGURE 4 I F. Water Development and Future Use The development of this new well is to replace the hazardous existing water tunnel source. Projection for the future will allow a possible second well on the site as a backup. III. DESIGN CONSIDERATIONS A. Exploratory Well The New Ookala Exploratory Well consists of 640 linear feet of 12 inches well casing, 60 linear feet of 12 inches standard perforated casing, 620 linear feet of grouted annulus, 5 linear feet of grout seal, 75 linear feet of gravel pack. As-Built well section is shown on Figure 4. The exploratory well was continuously pump tested for 5 days at a rate of approximately 500 gpm to determine the drawdown of the water table surface. The exploratory well will be converted into a production well after approval by the State Health Department, in compliance with Water Quality Standard, Chapter 11-20. The proposed design pumping capacity for the deepweU pumping unit shall be at least 100 GPM. B. Site Work Site grading involves minimizing excavation and embankment and maintaining the existing drainage patterns of the site. Proposed improvements result in maximum excavation and embankment of less than 2 feet. The New Ookala Exploratory Well site improvements will not significantly impact the existing drainage pattern. The existing drainage pattern naturally sheet flows across the site from south to north. No significant change to the rainfall runoff will be made. C. Environmental Issues Careful monitoring of adjacent structures was required during the pump testing of the well. The Contractor adhered to all erosion control and NPDES permit requirements for construction. Other environmental considerations have been addressed in the EnvironmeI1tal Assessment (EA) for this project. Page 3 IV. POTENTIAL SOURCES OF CONTAMINATION A. Potential Manmade Sources of Contamination The most probable manmade sources of contamination of the Ookala Well are the past agricultural activities. However, the depth of the well and the laboratory tests of the well water do not indicate a problem of contamination. B. Potential Natural Sources of Contamination The Ookala Well is not in a flood plain and is above the elevation of the highway. Therefore, there is little potential for contamination of this well by natural sources. v. COST OF CONSTRUCTION AND SCHEDULING A. Cost of Construction 1. Exploratory Well $425,000.00 B. Scheduling 1. Exploratory Well Started Construction: March 1995 Completed Construction: June 1995 VI. TREATMENT Water from the Ookala Well will be chlorinated and stored in the existing reinforced concrete tank. No other treatment will be necessary. Page 4 Step-Drawdown Pump Test June 7, 1995 Ookala Exploratory Well, State No. 6017-05 Pumpage Data: Water Level Flowrate Airline Electric Sounder Chloride Time Time Volume Flowrate Press. Drawdown DlW Drawdown Concentration (Sees) (Gallons) (GPM) (PSI) (Feet) (Feet) (Feet) (MG/L) 9: 13 Static 14.80 0.00 635.64 0.00 9: 15· Started the Pump 9:20 47.3 200 253 14.60 0.46 636.22 0.58 9:30 45.7 200 263 14.55 0.58 636.22 0.58 9:35 47.0 200 255 14.55 0.58 -- - - 9:45 47.0 200 255 14.55 0.58 636.22 0.58 11.3 9:50 Increased the Flowrate 9:55 35.1 200 342 14.425 0.87 636.49 0.85 10:05 35.4 200 339 14.425 0.87 636.49 0.85 10: 15 35.1 200 342 14.425 0.87 636.49 0.85 10:25 35.5 200 338 14.425 0.87 636.49 0.85 11.3 10:35 Increased the Flowrate 10:40 41.0 300 439 14.25 1.27 636.87 1.23 10:50 27.4 I 200 438 14.25 1.27 636.87 1.23 11 :00 27.4 I 200 438 14.25 1.27 636.87 1.23 11.3 I 11 :05 Increased the Flowrate 11: 1 5 26.3 I 200 456 14.20 1.39 636.95 1.31 11 :30 26.3 200 456 14.20 .. 1.39 636.95 1.31 11 :35 26.1 I 200 460 14.20 1.39 636.95 1.31 10.6 I 11:37 Increased the Flowrate 11 :40 36.9 300 488 14.15 1.50 637.07 1.43 11 :50 35.8 300 503 14.15 1.50 . 637.07 1.43 12:00 36.2 I 300 497 14.15 1.50 637.07 1.43 12: 1 0 36.4 I 300 495 14.15 1.50 637.07 1.43 10.8 12: 13 Pump Shut Down Recovery Data: Water Level Minutes Airline Electric Sounder Time Since Pump Pressure Residual Drawdown' DlW Residual Drawdown' Slopped (PSI) (Feet) (Feet) (Feet) .. 12: 15 2 I 14.75 0.12 635.58 0.06 12:25 12 ! 14.75 0.12 635.56 0.08 12:35 22 14.80 0.00 635.56 0.08 } Abo," St,t;, 12:45 32 14.80 0.00 635.56 0.08 12:50 37 14.80 0.00 635.56 0.08 • Residual drawdown values do not account for tidal variation during the test. 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Il?: 30 n. )5- t3.t-,,, 5 ! 05, ~ ~ ~ 0 - :<1'61 PfI'b- 6) . q _00 1'1. ?'8&56,1o~ /03. ! -.-~Q. __Jfk~ .'4f/~ g ,30 11'; Yo t'5Io'lboiE)3, '1, ..-.S~O..-1.~Cj 10: co lL.(t L/o &3b/!;1 }t03,8 . &&>0 Af~ fO;~O ;../ ,1-{() . 3IaS!}' 3, -.. -.--.---L.---L----.;..---c-::~__::;...~~"'--'-~~...&..-..J~~------. ~';rne. , / // ~ o€,;D/I< .;t2" 'a/::i 0 r ~()O 1/1~ //;50 .. !?~-? , ¥~y' / ;;;.,:Dft:> /;'?,'3tD ~IJ{) ¥t.y f' - --~~,~" YC,7 Irf>o ,.. 5.":00 r 1,'50 rtf. ;?:oo Sec- ?C5~ .. , ~O iC P~rr; '-17[; »---;;; ~ v -+ c4cj"", 1-'--- ..:., I, !) II ( ) ~ 'f 10 !i?~ ·40 }S~ s.,i., b3L:,ti) 40 I LABORATORY TEST ANALYSES , , BRE\NER ENVIRONMENTAL INDUaTAIE8. INC. LABORATORV ANALY IS REPORI Ellvlrc.llllllp.lllnll nhorAto es Dlvlsiofl CLIENT: WAI'ELI DRILLING ATTN: R. J P.O. BOX 5685 KAILUA-KONA, HI 96745 JOB NUMBER: DN£E! JULy , 1995 PROJECT NAME: Matrix: WATE Date/Time Sampled: 06/15/95 @ 1·5:00 Client 10#: WELL #1 Date/Time Received: 06/16/95 @ 09:00 ISLAND) REPORTING METHOD ANALYSIS RESULT LIMIT Mel UNIT NUMBER ( FLUORIDE BRL 0.20 1.0 mg/L 6/20/95 340.2 NITRATE-N aRL 5.0 10.0 mg/L 6/27/95 45000 NITRITE-N BRL 0.005 1.0 mg/L 6/19/95 354.1 TURBIDITY BRI. 1.0 NTU 6/21/95 180.1 ARSENIC BRL 5.0 0.05 uq/L.. 7/06/95 7060 BARIUM B~ 20.0 ,.0 ug/L 6/29/95 60l0A CADMIUM BRL 0.20 c.oos ug/L 6/30/95 7131 CHROMIUM BRL 10.0 0,1 ug/L 6/-:>.9/95 601DA COPPER BRL 50.0 0.00, ug/L 6/24/95 6010A LEAD BRL 5.0 O. tJIS (ltc.) uq/L .002177 7421 MERCURY BRL 0.50 I.~ lite..) ug/L 6/23/95 7470 SELEN1UM BRL 5.0 O·OS uq/L 7/07/95 7740 I-!01t.t·. (Au ": ActlOVl uvv\ ) BRL- Below Reporting Limit RECE\VEO .!l1I 1 31.Q!l5 hnalyees performed at a BEL affiliatQ facility. PAGE 1 OF 3 / 8QEWEP ENVIRONMENTAL LADOJllATDAI£& Approved by: .....;~'-f.=UJ:;.,..rk.c....;;.=-J-f...... :,.-!/~:,..A' ...".....'--_ J" F'IICIFIC ~T"'ffT Jfn"~I"fq Itt qf'lr-,' 7 i4A4$A ,. BRElNER SHVI RONMIINTAL 'NPU8TAtl!a. 'NC. LABORATORY ANALY IS REPORT • a ."~\N'i'" r... ~ ...... Environmental Laborato les DIvision CLIENT: WAI'ELI DRILLING A'rTN: R. J P.O. BOX 5685 KAILUA-KONA, HI- 96745 JOB NUMBER: E OAT}!;: JULY .1.995 PROJECT NAME: Matrix: WA'l'E Date/Time Sampled: 06/15/95 @ 15:00 Client 10#1 0 Date/Time Received: 06/16/95 @ 09:00 Lab sample 10 REPORTING METHOD ANALYSIS RESULT LIMIT MCl" UNIT NUMBER t~~lL) PCBs (TOTAL) BRL 0.1.0 O.OO~5 ug/L 6/28/95 SOB PENTACHLOROPHENOL BRL 0.078 0·00\ ug/L 06/30/95 515.1 G-BHC(LINDANE) BRt 0.004 0·000'2. uq/L 6/28/95 508 CRLOlillANE BRL 0.014 o· 00" ug/L 06128/95 508 ENDRIN BRL 0.008 0·00" ug/L 06/28/95 508 HEPTACHLOR BRL 0.003 o.OQo,\- ug/,t· 6/28/95 508 HEPTACHLOREPOXIDE ImL 0.083 o .ooo'Z. ug/L 6/28/95 508 TOXAPHENE BRL 0.24 o.oo~ uq/L 6/28/95 SOB MTREX-ATRAZINE BRL 2.0 O.OO~ uq/L 6/29/95 507 ALACHLOR BRL 2.0 0.00l. uq/L 6/29/95 507 CARBOFLURAN BRL 0.90 () .04- ug/L 6/26/95 531.1 2,4-0 BRL 0.20 0.0, ug/L 6/30/95 515.1 METHOXYClU.OR BRL 0.18 o.Ot ug/L 6/28/95 SOB 2,4,5-TP(SILVEX) BRL 0.075 o.os uq/L 6/30/95 515.1 DBep BRL 0.01 0.00004- ug/L 7/07/95 504 ETfiYLENED I BROMI DE (EDB) BRL 0.01 o.O()oo4- ug/L 7/07/95 504 BRL= Below Reporting Limit Ana lyses performed at a BEL affiliab~ facility. PAGE 2 OF 3 IIAiWEA IiNVIRONMENTAL lAOOMTOR'ES Approved by: ~II PAo<"lC STREET HOt/OLVLV, HI 9t8H ~'-:vtF ~<'~'" :,~~.:_.~, " BRE\NER ENVIRONMENTAL INDUDT"'C •• INC . LABORATORY ANA~ IS REPORT • 0 "'IW.~ ceo-..", CLIENT: WAI'ELI DRILLING ATTN: R. J P.o. BOX 5685 KAILUA-KONA, HI ' 96745 DATE: , 1995 PROJECT NAME: Matrix: WA'l" Date/Time Sampled: 06/15/95 @ 15:00 Client 10#: 0, Date/Time Received: 06/16/95 @ 09:00 Lab Sample 10 -.---- REPORTING METHOD ANALYSIS RESULT LIMIT MGL- UNIT NUMBmt BENZENE BRL 0.01 o·oos ug/L 6/29/95 502.2 CARBON TETRACHLORIDE BRL 0.02 () ·005 ug/L 6/29/95 502.2 CHLOROBENZENE BRL 0.02 ug/L 6/29/95 502.2 1,2-DICHLOROBENZENE BRL 0.03 ug/L 6/29/95 502.2 1,4-DICHLOROBENZENE BRL 0.03 uq/L 6'/29/95 502.2 1,2-DICHLOROETHANE BRL 0.03 0.005 ug/Ii' 6/29/95 502.2 l,l-DICHLOROETHENE BRL 0.04 ug/L 6/29/95 502.2 CIS 1,2-DICHLOROETHENE BRL 0.03 0.01 ug/L 6129/95 502.2 1,2-DICHLOROPROPANE BRL 0.05 t7. 01') 5 ug/L 6/29/95 502.2 ETHYLBENZENE BRL 0.01 0.' ug/L 6/29/95 502.2 o. , ST~ENE BRL 0.10 ug/L 6(29/95 502.2 TETRACHLOROETHENE BRL 0.02 ug/L 6/29/95 502.2 TOLUENE BRL o.o'a \.0 ug/L 6/29/95 502.2 1,1,1-TRICHLOROETHANE BRL 0.01 o. '- ug/L 6/29/95 502.2 TR1CHLOROET-HENE BRL 0.03 ug/L 6/29/95 502.2 1,2,3~TRICHLOROPROPANE BRL 0.02 o.oooQ, uq/L 502.2 VINYL CHLORIDE BRL 0.01 ().oen.. ug/L 502.2 XYLENES BRL 0.20 \0.0 uq/L 502.2 BRL= Below Reporting Limit Analyses performed at a BEL affiliate facility. PAGE 3 OF 3 / BREWER riNVtRcmMENTAI. l.ABDAATOIUEB Approved by: --.:4:....~~::::.....;~=-_~.-:...... CS!~::oo..G:._ ~., !"I\CIflC STII£ET t-tONOllIlV, HI 1I~1!11 Ol"·".·r r.'t'lA'.Ci 'J~ ,,.07 C I BASIS OF DESIGN I for OOKALA PRODUCTION WELL AND SUPPORTING FACILITIES I STATE NO. 6017-05 E Ookala, North HUo, Hawaii C Tax Map Key: 3-9-1:34 Proposing Agency '~, Department of Water Supply County of Hawaii 25 Aupuni Street Hilo, Hawaii 96720 Prepared by SSFM Engineers, Inc. 501 Sumner Street, Suite 502 Honolulu, Hawaii 96817 November 1996 •- TABLE OF CONTENTS L GENERAL l. Purpose 2. Scope of Work 3. Project Funding 4. References II. PROJECT AREA l. Location 2. Existing Conditions a. Well Number 6017-05 b. Water Reservoir .. 3 . Siting .. ill. DESIGN CONSIDERATION .. l. Estimated Water Demand • 2. Production Well System a. Control Room III i b. Pumping System 3. Electrical Power and Controls II I IV. SITE IMPROVEMENTS l. Site Work .."" 2. Environmental Issues LIST OF FIGURES Figure 1 Site Plan .. Figure 2 Control Room Plan .. Figure 3 Piping Plan Ii"'" 1 -• • L GENERAL 1. Purpose The purpose of the project is to replace the deteriorated existing inclined shaft, Well Number 9117-01, with a new production well, Well Number 6017-05 and supporting facilities. The proposed well will be servicing the Old Dispensary area, • the Boarding House area, the Store Camp area, the Ookala Skilled area, the Kukui .. Village, the Nui VIllage and the Milo Village. With the exception of Milo Village, the other noted villages or camps will be serviced through main line master meters. 2. Scope of Work The project involves constructing a new production well and supporting facilities, - in accordance with Department of Water Supply, County of Hawaii standards. The water, drawn from the well, will be pumped to the existing concrete reservoir. The production well will be designed to handle the demands of the villages and its • fire flow of at least 500 gpm for 2 hours . The existing inclined shaft and 16-inch diameter transmission line will remain in service during the construction period and will probably be abandoned after completion of the production well. 3. Project Funding The project is authorized and being funded by the Department of Water Supply, County of Hawaii, JOB NO. 93-581, OOKALA PRODUCTION WELL AND SUPPORTING FACILITIES. 4. References a. Water System Standards, State of Hawaii, 1985, Volume 1 b. Approved Material List and Standard Details for Water System Construction, State of Hawaii, 1985, Volume 2 I11III c. Environmental Assessment for Exploratory Well, Ookala, Hamakua, Hawaii, TMK: 3-9-1 :34, dated September, 1994 .. d. Topographic Surveys of the project areas, perfonned by Island Survey, 2 - - Inc., date March 14, 1994 e. Pump Test Results for the Ookala Exploratory Well State No. 6017-05, prepared by Tom Nance Water Resource Engineering II. PROJECT AREA - 1. Location The project area is located south-west of the Kaula Gulch, north of the Hawaii Belt Road and east of the existing rectangular concrete reservoir in Ookala. Site Plan is shown on Figure I. •- 2 . Existing Conditions liliiii The proposed site varies in elevation from 6S2 feet along the Hawaii Belt Road to III 640 feet to the north of the Hawaii Belt Road. The site is overgrown with grass. To the east stands a utility pole with overhead lines and Well Number 6017-0S. To the north-east are water valve boxes, water meters and fence posts. To the west of the proposed site is an existing concrete water reservoir. a. Well Number 6017-0S Well Number 6017-0S was constructed and successfully pumped tested in June of 1995. It is located approximately 60 feet north of the Hawaii Belt Road and approximately 163 feet east of the existing concrete water reservoir. The ground elevation of the well is approximately at 640.7 feet. The well consists of 640 feet of solid casing and 60 feet of louvered casing. Both casing are 12-inch inside diameter and Sl16-inch thick. The solid casing extends seven to eight feet into water. b. Water Reservoir The existing rectangular concrete reservoir was constructed in 1983. It is I!IIII located to the south-west of the Kaula Gulch and to the north of Hawaii Belt Road. Access is an existing dirt road off of a paved road from Ookala town. The reservoir is 92 feet long, 32 feet wide and 16 feet high with a capacity of approximately 3S0,000 gallons. It lies at 642 feet elevation. The reservoir stores water for the villages. 3. Siting ..'" 3 •- Siting of the Control Room and Well Number 6017-05 as shown on Figure I and IT. As indicated, the building is sited with its long axis oriented in an east to west direction. The chlorinator room on the east side of the building. The building is located 20 feet east of the existing concrete water reservoir. The finish floor elevation of the building will be at 466.5 feet. Section of an existing 8 feet wide dirt road will be extended for access between Control Room and the new well. m. DESIGN CONSIDERATIONS 1. Estimated Water Demand .. According to the Department of Water Supply, County of Hawaii, there are 83 existing service lateral connections. The following is a break down of the service - lateral connections: Village Name No. oflaterals • Old Dispensary Area 3 .. Boarding House Area 2 Store Camp Area 2 Ookala Skilled Area 8 Kukui Village 22 .. Nui Village 17 .. Milo Village 29 Total 83 Based on the Water System Standards, State of Hawaii, 1985, Volume 1, average daily demand is 23 gpm, maximum daily demand is 35 gpm and peak hour demand is 115 gpm. The fire flow minimum requirement specified by the Department's standards shall be for 500 gpm for a duration of 2 hours. The Department of Water Supply, County of Hawaii, does not foresee significant • future water demand will be added. 2. Production Well System 4 - .. .. a. Control Room • Figure II illustrates the preliminary layout of the Control Room. A 20 feet long, 12 feet wide and 8 feet 8 inches high concrete masonry unit structure will be built to house the electrical control panel, flow recorder, • chlorinator system, booster pumps and air compressor. The rooms will be naturally vented. The chlorinator room will be separated into two with a fire wall door. Each room will consists of a chlorine cylinder and a chlorine alarm sensor. The chlorinator room will be designed to meet the Fire Code of the County of Hawaii. An emergency shower and eye wash II will be located just outside of the chlorinator room. b. Pumping System The pumping system is proposed to consist ofa 100 gpm, 680 feet TOR, .. 25 HP and 12 stages submersible pump and motor and approximately 800 • feet of 4 inch ductile iron pipe. The submersible pump will be piped to the existing concrete water reservoir. Piping Plan is shown on Figure m. An air bubbler system will monitor the well water level and record it on a .. strip chart in the control room . iii 3. Electrical Power and Controls Electrical service will be from a nearby power pole #5 which is approximately 85 feet east of the control room and 45 feet west of the Well Number 6017-05. Electrical power will be provided for lighting of the control room, control panel, pumps, air compressor and telemetering equipment. Standby generator will not be provided since the existing storage reservoir can hold up to two days supply. The following telemetering facilities shall be provided for the production well system. A provision will be made in the future to transmit the telemetering signals to the central station at Hilo base yard. Telemeter for: a. Flow b. Status of pump c. HECO power failure alarm 5 - • IV. SITE IMPROVEMENTS 1. Site Work Site grading involves minimizing excavation and embankment and maintaining the existing drainage patterns of the site. Proposed improvements result in maximum excavation and embankment of less than 2 feet. The site improvements will not significantly impact the existing drainage pattern. The existing drainage pattern of the site is, storm water runoff sheetflows across the site from south to north . • 2. Environmental Issues Careful monitoring of adjacent structures will be required during construction . • The Contractor shall be required to adhere to all erosion control and NPDES permit requirements for construction. Other environmental considerations have been addressed in the Environmental Assessment (EA) for this project. I I 6 I - •.. DIRECTION OF .. PREVAILING WIND () .~WELL ~O. 601'.05 r'- \ 640·' _ .... , __~~ WVB0 ..... -y..," .... ~-.... ., / ~ . ____ ,!,,, __ --"""" ..... __ d. \IIU \l1li '\ " __ - I I""? .. ~ ----___ ? ... O_~~-- ____ .. 7"" ...... _ - __ -r~ --- ~- - • \..~--- -~--~ . __ ---.J/-~X 74;x~:;~~--~ " / I'" .... _OU / / I .... _ .... _____...... -,.....__ ,."".' / / I I _-\ I., ~ 7-- I -,"'!-- I -- ,/ - -,---- 7_ - ...... 6f1Il --I --- ,.III I • " .. .. FIGURE I () I.. II SWING DOOR -• ...N - ) - MERGENCY IlOWERlEYE WASH CMU STRUCfURE ..III I FIGURE II -• MATERIAL LIST I 1 - 4" DI PIPE LENGTH TO SUIT 1-4"x3"TEE 3-3"x3"TEE 4 -3" BALL VALVE 5-3" AIR AND VACUUM VALVE I WITH AIR RELEASE VALVE 6 - 3" DI PIPE LENGTH TO SUIT 7 - 3" PRESSURE RELIEF VALVE 1-3" x3" 9O'ELBOW 9 - 4" CENTER GUlDED CHECK VALVE 10-4" DIPIPE II - UNIVERSAL VENTURI TUBE, FLOW METER 11-4" DI PIPE 13 -Ill" FLOW SWITCH I 14 - 4" TEE WITH BLIND FLANGE 15-4" BUTTERFLY VALVE 16 - 4" DI PIPE 17 -I" COMBINATION AIR VALVE 18 - 4" 45" BEND 19 - 4" DI PIPE 10 -1111" CHLORINE SOLUTION LINE 11 -1111" CHLORINE SOLUTION SUCfION LINE 11-PRESSURE GAUGE ASSEMBLY 13-318" AIRLINE S'fAA/TSU)TO PUMP GOL.IJI"1", .. \-.J/ssr STAAPS CD , ",. / .'> A TO EXISTING ___....~ CONCRETE WATER I RESERVOIR ® I---~--- ELEV -7.S: I ------ELEV--lS.O I I FIGURE III - - ENVIRONMENTAL ASSESSMENT - for ,.... EXPLORATORY WELL - Ookala, North HHo, Hawaii Tax Map Key: 3-9-1:34 I I Proposing Agency Department of Water Supply County of Hawaii 25 Aupuni Street [ Hilo, Hawaii I Prepared by SSFM Engineers, Inc. I 501 Sumner Street, Suite 502 Honolulu, Hawaii 96817 I October, 1994 I I I I I I I I I I I I I I I I I I I I I I I I - - Ookala Exploratory Well Environmental Assessment Page 2 B. Funding - The project is authorized and funded by the Department of Water Supply, County of - Hawaii, Job. No. 93-580, "Ookala Exploratory Well Drilling", and Job No. 93-581, .. "Ookala Production Well and Supporting Facilities". - C. Purpose of Work This exploratory well drilling is intended to develop groundwater resource. Should the - exploratory well produce an adequate quality and quantity of water, a production well ... and supporting facilities will be constructed to replace the existing inclined shaft which is owned and operated by Hamakua Sugar Company. A separate environmental - assessment will be prepared for the production well and supporting facilities. Should the exploratory well not produce an adequate quality and quantity of water, the well - will be sealed and the site restored to its existing condition. - D. Existing Inclined Shaft - The existing inclined shaft, Well Number 6117-01 2 is located adjacent to Kaula Gulch and southwest of the abandoned sugar mill in Ookala. The inclined shaft, constructed - in the late 1930's, is approximately 600 feet long with a slope of approximately 30%. A copy of the Well Registration is included in Appendix 1. The entrance to the shaft - is at an elevation of 300 feet mean sea level (MSL). There are two pump houses located at the end of the shaft. Figure D shows a plan of the inclined shaft. The pump houses are accessed via a cable car which travels on rails through the shaft. One pump is for domestic water and the other pumped water to the sugar mill. The estimated - water level is +6 feet above MSU. The County of Hawaii Department of Water .. Supply has indicated that they will not operate the inclined shaft on a long term basis - should Hamakua Sugar cease operations due to its dilapidated condition. - E. Proposed Exploratory Well .. The exploratory well will be located adjacent to the existing water reservoir and Mamalahoa Highway. The well will be drilled and a 12" diameter casing installed. The annular space will be packed with filter material, grouted, and the well flushed clean of drill cuttings. Then the well is tested by pumping continuously for a maximum of 5 days. 2 Commission on Water Resource Management 3 Commission on Water Resource Management - - - Ookala Exploratory Well Environmental Assessment Page 3 1. Technical Characteristics (See Figure E, Exploratory Well Section) - Ground Elevation: 648 feet MSL - Casing Diameter: 12 inches .. Length of Solid Casing: 623 feet Length of Perforated Casing: 30 feet Length of Open Hole: To be determined in the field .. Total Depth: To be determined in the field Duration of Pump Test: 5 days maximum, 24 hrs per day Proposed Pump Test Range: 100-500 gpm, avg = 300 gpm -.. Estimated Length of Project: 220 Days - Estimated Construction Cost: $645,000. - 2. Economic Characteristics - The exploratory well will not generate revenue. If the exploratory well produces an adequate quality and quantity of water, a production well will be constructed. - This production well is not expected to be profitable as it is anticipated that III expenses will exceed revenues. The existing service area includes Akasaki Camp, Milo Village and Kukui Village. A total of 83 households will be served 4 with anticipated annual revenues of approximately $14,310 • The anticipated construction cost for the production well and appurtenances is $500,000. 3. Social Characteristics The population served by the existing inclined shaft will continue to require - potable water after Hamakua Sugar Company ceases operations. The Department .. of Water Supply is obligated to provide water to existing customers in Milo Village. If the exploratory well produces adequate quality and quantity of - potable water, a permanent production well will be constructed to replace the existing inclined shaft. The community may experience a negative impact if the production well is not constructed. If the inclined shaft is not operational and no .. replacement well is constructed, the Department of Water Supply will have to haul water to supply the community. 4. Environmental Characteristics During drilling and testing, noise levels may exceed allowable levels. Water discharged during testing may impact the environment. Proposed mitigation measures are outlined in the "Proposed Mitigation Measures" section below. 4 Department of Water Supply ------_.__ ._ ..... , - - Ookala Exploratory Well Environmental Assessment Page 4 ,... VI. Description of the Environment ,... A. North Hilo District The North Hilo District extends along the Hamakua Coast of the Island of Hawaii. - The proposed exploratory well will be drilled in Ookala Town, North Hilo District. Ookala Town was formerly a plantation town whose residents worked in the sugar plantations along the Hamakua Coast. Since the closing of Hamakua Sugar, the resident population has diminished. The residential population of the district in 1990 - 5 was 1,541, down from 1,679 in 1980 and 1,881 in 1970 • The water service area, ,... located makai of Mamalahoa Highway, includes Akasaki Camp, Milo Village and Kukui Village. -.. B. Project Site The proposed well site is adjacent to Hamakua Sugar's existing 350,000 gallon potable water storage reservoir, located makai ofMamalahoa Highway and east ofKaula Gulch - on the lower slopes of Mauna Kea, near the coastline. Milo Village is makai of the well site and the nearest residence is approximately 400 feet from the well site. - 1. Geology and Soils Soil type in the surrounding area is classified as Ookala silty clay loam, 12 to 20 percent slopes (Ood)6. The Ookala series consists of well-drained silty clay loams that formed in volcanic ash. The fertile topsoil supports vegetation which - intercepts runoff. The porous layers of lava beneath permit a high rate of infiltration. Runoff is slow and erosion hazard is slight. - The soil surface layer is dark reddish-brown silty clay loam about 12 inches thick. The subsoil is dark-brown to dark yellowish-brown silty clay loam about 43 inches thick. This is underlain by very dark grayish-brown, partly weathered Aa lava fragments. Mean annual soil temperature is between 72 to 74 F. This soil has a very strongly acid surface layer and a slightly acid to medium acid subsoil. 5 "County and District Trends In Hawaii, 1990", Hawaii State Department of Business, Economic Development and Tourism (Statistical Report 218, May 1991), table 33. 6 "Soil Survey o/the Island o/Hawaii, State o/Hawaii", United States Department of Agriculture, Soil Conservation Service, December 1973 - - Ookala Exploratory Well Environmental Assessment - PageS - 2. Climate The project site is located on the Hamakua Coast on the windward side of the Island of Hawaii. The island lies within the tropics. Winter storms move -III eastward across the Pacific Ocean north of Hawaii bringing widespread, heavy rains. Trade wind showers bring the greatest amount of rainfall over the windward slopes of the island. Orographic, or mountain caused, showers occur along the Hamakua Coast as moist air cools as it rises up the slopes of Mauna 7 Kea. Annual rainfall in Ookala varies from 100 to 190 inches • Mean monthly temperatures range between 65° and 85° F8. Prevailing winds blow from the east, -III ormakai. - 3. Flora and Fauna No unique flora or fauna were observed on the site. Vegetation consists - primarily of hilograss, guava, norfolk pine trees, and California grass. Photo graphs of the site are included in Appendix 2. Wildlife inhabiting the area are those associated with canefields, such as mongoose and other rodents. No III threatened or endangered species are known to inhabit the project site or enVIrons. - 4. Archaeology It is unlikely that there are any historic sites onsite or nearby9. The Contractor will be required to contact the Historic Preservation Division if any historic - remains are discovered. .. 5. Zoning The land is zoned RS-1 0 by Hawaii County Planning Department. RS-10 zoning allows for residential use with a minimum lot area of 10,000 square feet. The ... land is designed for Urban use by the State Land Use Commission. The proposed well is consistent with the existing zoning and land use. 7 "Climatological Data, Annual Summary, Hawaii and Pacific", U.S. Department of Commerce, National Climatic Data Center, (1992) 8 "Soil Survey o/the Island o/Hawaii, State o/Hawaii", United States Department of Agriculture, Soil Conservation Service, December 1973 9 Historic Preservation Division, Department of Land and Natural Resources - - Ookala Exploratory Well Environmental Assessment Page 6 ..- VII. Probable Impacts A. Short-term Impacts Anticipated impacts of the project will occur during site preparation, well drilling, and test pumping the well. Affected flora and fauna are common to the area and the project's temporary effect will not be significant. There will be minimal dust impact since only a minor amount of grading and clearing is proposed. -.. 1. Noise Temporary and unavoidable construction noise will occur during the drilling of - the exploratory well with generator and pump noise occurring during the five day test pumping of the well. Noise during drilling and test pumping may be in excess of allowable level. The closest residential lot is 400 ft from project. After - the well has been drilled and cased, a temporary pump will be installed in the well to test the groundwater aquifer for yield and water quality. The test pumping will be performed 24 hours per day for a maximum of 5 days. Electricity for the test pumps will be provided by a portable generator or Hawaii - Electric Light Company. If a generator is used, it may be heard at night. 2. Water Discharge - Water will be discharged during the well flushing and test pumping. The rate of discharge during testing will vary from 100 to 500 gallons per minute (GPM), - averaging 300 GPM. .. B. Long-term Impacts No long-term impacts are anticipated from the construction and testing of this .. exploratory water well . VIII. Proposed Mitigation Measures A. Noise Drilling will be restricted to daylight hours and weekdays, 8 hours per day maximum. The Contractor will utilize mufflers as necessary to comply with Chapters 42 and 43 of Title 11, Administrative Rules, State Department of Health. Mufflers and r soundproofing will be used to lower noise generated by the pump motor and electric IIiiI generator during the test pumping. - - Ookala Exploratory Well Environmental Assessment Page 7 .. B. Water Discharge Erosion and sediment control provisions will be included in the contract specifications to mitigate dust and erosion due to storm runoff over ground surfaces disturbed by - construction activities. Water to flush the well will be piped to retention basins. The retention basins will retain flushed material and allow water to percolate into the .. ground. After the well is tested, the retention basins will be backfilled and area regraded and revegetated. - Water pumped during testing of the well will be piped to the rock stream bed of Kaula Gulch. The flow rate of the water discharged from the test well (1.1 cubic feet per second) is a fraction of the flow capacity of Kaula Gulch. The water from the well - should be of potable quality. Piping the water to the stream bed will avoid erosion caused by water flowing over the ground. The environmental impact of discharging - ground water into Kaula Gulch is insignificant. - IX. Alternatives No alternative sites were considered. This site was selected for its proximity to the existing reservoir and the high probability of successfully developing the necessary groundwater .. resource . - ... X. Determination - There are no significant adverse impacts from this project. .. .. - ..- - -.. - ..- - .. - FIGURES - - • I11III • __--PROJECT LOCATION . FI.GURE A Island of Hawaii Map REF: READERS DIGEST WIDE WORLD ATLAS 1979 SCALE 1: 1,500,000 - - - Exploratory Well Site Inclined Shaft Site Papaaloa Pt It" " - - FIGURE B Vicinity Map REFERENCE: USGS 1982 SCALE 1 :24,000 - \, NORTH EXPOSED pvc PIPE / - WITH WA TER ~ETER / "./ / // / 6416- 642,)/ I .,../ / / ' "J 6436, , "J ,?ID 1 0 \ \ /I 1 \g '" ~ ~ I: \ \647'6//'6485 " , '" ~ I,}, I , ' 1 4,284.28 N 635'B ~ I F,42~ I I rn 13-8 I 1 I I I PP #5 I I I I 2,528.43 W : / 639~ EY~~S~~~:~C PtE / 1< ~48~ "HUMUULA" /1 , FENCE POST I I 'I: I I , 10 638i I , / I , , I~ FENCE POST, , I , 0;.' 64711 J 637J 0 I I FENCE POST ~ I / I 61'6 ~ EXPLORATORY 639'2 ~ 5,'-:'2 , 'I II , I , I 6' I, I I 6526' WELL SITE to I t'<' t 'I I I 63Be .63ge I" , 64~;\ / ~ " r;' \ '.'1M I 6436. -- " ./ \Jl 63B~ , WV8 \ : I W\18 I I 6439' \ 6462 6395"" \ I, \ 6\~~E.~CoE 6:;iT\,' / \ \ I; I ; \ I , \ ,~ , ,I I , J I '{' I 6' . j ~ 643'2 6436' , -:-' I , , \ '~ I 63B9~ ~4~' 1 ':6442 '-~_ , \ 65~ 1 ~ \~_ " "'~ f53Z' ~ I :i. ' - ___ . '::-.,', ~f.\ FENCE PLlS"ij 'I" • .- " • \;;"'-, 0 6426 , . 6432 6435 "!)lo,:::\\,~ 6371lfl. 1\"""', 6441 11,\ \\ r ,0 '" " 6426 '\1\\' ~ TREE ,6412 .46420 , '643: -= -'l I'" 2.0 [) '.' \ A 6 30 \ I , \ ·1\ /. ," \ ,\\ 6526ffc 300. H ,6429' I . ) 'I . , , ,.;;I I f425\1\ 6520 .;:)\ \ \·6426 "Il\')\ ~ \ \ \ -'l 1\ 6361'", \ \ ~\ c::: 6<2\~\\ "- ~, \ \. <::"I" \"" " ~ ...... ,', \ \, ~ \ \, "6429 r , \ \ \" I, -\ _I \-i. ~ , \ \ ~6421Z , {11 ~\ 6508 6511 ~\ \ \ .;] ,6428 642t \~ ~ \ FENCE POST \ ::0 .,. I 634Z oil \ \ '" 64~~ , -\ 642:: ~~, ~ I I \.;] . \ I ~ .;:)It~ .;j \ \, " .., , ~11651l I I' \ I, ~ II' ~ \ \.;] 6430 -;::.. .;jl' .;j I 1639a/1 WV8 _ 6425 'I \.6508 I EXPOSED 4" WL. .-' .;]6422. . 6~2a .;l::, /~ MANGO 6330-i1 I \ I, 6425, ~ " ,I, ,',,- O.B D • I \ \ I, I \ "" AFRICAN TUlIP\ " I 1.;;1 \ \ II --= .;]:'/ / 12.0 H 1.5 D .;] \ I I I \ \ 1\ . 6441!"1 6531 TREE 40.0 H ,_c r ."-, .oj \ 642i' \ =- 6",/1 -;::.~jll I • Ii' 0.6 D ·~·",r'I·1 . , ' \6431 643"""'./64~··G~ij.j /,/ '.,12.0H 63D::.,. , ,I I 6416 ...... ,... ., .... '651,. ... WV8 :-j '" 0 I., -'1/ 643'1' I 6435 '" '" / 0-' 551"'".;.. lREE 0..... ~ "iJ' I '" / "/C~"7. I I L 25 0 630~ I -!j 6335, I / \ ">1./ '" "" ~v... ~~ ./ 0"./ [ ,.- . 632il ..1','.,1' ·I.;f,.... ,. I I 1',4,0, ,6562 6/ 575 I TREE I \ I I\X" " I /.1 , \ I \I 1 I{ ...... ' I .;j I ~64f6 ~- 1.5 D ~ I 5403 ,--,-, \ \ \ I I v' 35.0 H , I \ I. IJ, 6416', \ ,', ?J:'\~5(8 \, FIGURE C Site Map Ref.: Island Survey, Inc. Scale: 1 \\ =40' Transformer _---l Graphic Scale Domestic Water Pump House FIGURE D Plan View Inclined Shaft REF: D.L.N.R. -... "fo 0.51 Ci I E:)(I&T qROttNO' r-6- EL€IJ r-- ..------f- G+~± " r-,----fi'6" , .' , , 20',,%" , . " ~;;(Gt:L S,l.-C(I};; ---: ~ , I-- 7'6~+'T-l1ICK c -, --- Co,./:-, &otlo(.. tZ'U51N6 , , ~ " 0 10 DIAM, I--- ~IN J ~ "",OU,ED ~ I--- Al-I~U\.AI2.-'" SPI\C-6 )/. ~ ct '''i ~. "2 4- (.') ~1II Tl V\ H, ~ ..-: . ::l I" <.) :f) J ~ lJ.l N '2 ~ ~ :I '-" 'i () \- '2 ~ ZS is Ul ol \U 7. ~ r ...1 ~ '"4- ~ " ~ I )!1 t- ~ 3' (0,.\(,. MIY ~ r- .J e' GAN? "- 5 ~ '- l-' 0 F'l~t;; .f....t-:.j. b\ e' ~ IfI <:: toul:.S6 .l\dr', 1"7 ~ t :t\ A;;. ~ Q. '. ;.:i',po -f ~ :i~ III .. ~ ~,~' ::: .. 3 ::! :4 ~~:(~ 2 .. ~. ¥ :2 ~ ~~ .( r'- I',? ). ,'., , - ~ ).- D V\ :s 0' " e ~ )'. '., l t>L 1 D. ... ;'"' Fof. 0 J~ C'<'\ ~ ~ Ii: ~ 1\ WR t) X'. V J ,A 1'6\2... !.-"6 Vc:L- !~ nrv~ 6:!: \l I.r r~ - " :;~ i ,;;l$\l 0 -? _C>. Ql cl III C.A5'l-lb $joE- J ~ Ui -IO"OI",-H, ~ ~ --< '0 W '2 ...I III <:) :+ \.I> , F ~ ~ ~: L BOTTOM Of" ..,JELL ~ FIGURE E Exploratory Well Section No Scale - - - - APPENDIX 1 Registration of Well .... and - Declaration of Water Use .. .... !'oem 8810-1 SlATE OF HAWAII COMMISSION ON WATER RESOURCE MANAGEMENT DEPARTMENT OF LAND AND NATURAL RESOURCES .. DIVISION OF WATER HESOURCE MANAGEMENT REGISTRATION OF WELL MID DECLARATION OF WATER USE INS1AlJCll0~~$: PlellSo typo or prin!. II inlornH.llion Is nol 8\'oi\.nble or not cr-plir:- "I(t, Indica!!) 119 .(!A fill oul as completely as possib!'l. S!UI1. aro IIIn lorm wHh ihe OMslon of Waler Resou("..e Management, p.e Box 373, Honolulu, Hawaii 96809. Phone 5~e·J948 Or 548·75<13 1« ar..slstanr.J3. BAT"ir:.nv OF V/Ell3: For 8 baUery of wefts, on the suriaoo, in B lunnel, or in a !-;tloll. submit Q rp-gi~lrnlion form lor eadl well together ..r with a single mep or p!ot plan showing layout of wells . STATE WELL NO.: 0//7-01 ISLAND: t/AW4I/ WELL NAME OR DESIGNATION: ----'O'-'O:..J./<.,..C"-1A..::'-O-"'_...... :c.>_II...:.l1.;.:.pf______ SOURCE OR STATION NAME (For 8 bnllery 01 wells): ______ A. WELL OPERATOR 8. OWNER OF WELL SITE Firm name: 1141\14Ic.JG412.- Co INc. Firm name: !toned-vA Sv(;.r"n2- Co, /"'.G- ) Contact person: PA-rte/C-/ A ?oPPi::- Contact person: f4-ne.1 C-I A ?oI"P£. Address: 'P. Q, BOle ?6V Address: '\7.0· OO"f.- us() 'PfYJ0L..O, fI / ?(!AVtL..-O I tJ I Zip: qr0170 Phone: -77& _,oS?I Zip: 0..1:;170 Phone: 17& -/:;-..2/ C. WELL LOCATION