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Home My WebLink AboutWTR2700718(3) W-718 WELL #9 PUMP HOUSE WTR-9 1 #4 TechkJicdl Provisions & Reference Mdps BEGINNING OF FILE FILE TITLE 7tT $u�Cy uRreS P,, O, /G� se RQ4eReNce va/0.3 (Pef 3 re j TECHNICAL SPECIFICATIONS WELL NO. 9 PRODUCTION AND OBSERVATION WELL SCHEDULE A AND SCHEDULE B WATER PROJECT NO. 665 INDEX PAGE 1.0 GENERAL REOUIREMENTS 1. STTE INVESTIGATION AND REPRESENTATION 45 2. INFORMATION ON SITE CONDITIONS 45 3. TEMPORARY WATER 45 4. TEMPORARY ELECTRIC POWF^. 46 5. SANITAPY FACILITIES 46 • 6. DAMAGE TO EXISTING FACILITIES 46 7. STORAGE. OF MATERIALS 46 S. CONTRACTOR'S EXPPRIE'-E 46 9. DAMAGE. TO LANDSCAPT.Nk, 47 2.0 WASTE MATERIAL, WASTEWATER, AND DISPOSAL ...1 GENERAL 1. SCOPE 47 2.2 MATERI, L 1. WASTE MATERIALS 47 2. WASTF.WATP.RS 47 1,3 PAYMENT 48 3.0 24-INCH WELL 9 CONSTRUCTION - SCHEDULE 3.1 GENERAL I. SCOPE 4R 2. STANDARD SPECIFICATIONS 48 3. SUBMITTALS 48 4. CONFIGURATION AND YIELD OF WELL 4q • 5. WELL LOCATIONS 49 3.2 MATERIALS 42 1. WELL CASING 69 2. CASING DRIVE. SGOE 50 3. WELL SCREEN 50 4. CEMENT GROUT FOR SURFACE SEAT. 50 5. WELL CAP 50 6. BACKFILL 50 3.3 WORKMANSHIP 1. DRILLING 51 INSTALLATION OF CASINO 51 I. WELL ALIGNMENT AND PLIIMBNESS 51 4. 4BANDONMENT SI • 5. DRILLING REPORT 52 6. MATERIAL SAMPLING S2 7. INSTALLATION OF WELL SCREEN 53 B. WELL DEVELOPMENT 57 9. PUMPING TEST 54 10. SEALING OF CASING 55 11. DISINFECTION 56 12. CAPPING 56 13. WATER SAMPLING 56 • 4.0 8-INCH OBSERVATION WELL CONSTRUCTION - SCHEDULE 8 4.1 GE) RAL 1. SCOPE. 56 2. STANDARD SPECIFICATIONS 56 3. SUBMITT4LS 56 4. CONFIGURATION OF WELL 57 5. WELL LOCATION 57 4.2 MATERIALS 1. WELL CASING 58 2. CASING DRIVE. SHOE 58 3. WELL CAP 58 4.3 WORKMANSHIP 1. DRILLING 58 2. INSTALLATION OF CASING 59 3. WELL ALIGNMENT AND PLUMPNESS 59 4. ABANDONMENT 59 5. DRILLING REPORT 59 6. MATERIAL SAMPLING 60 7. INSTALLATION OF INSIDE. CASING SEAT. 60 • 8. CASING PERFORATIONS 60 9. WELL DEVELOPMENT 61 43 • 10. PLMPING TEST 61 11. SEALING OF CASING 62 12. DISINFECTION 62 13. PERMANENT CAPPING 62 • • • is W 66S TECHNICAL SPECS. DECEMBER 19A2 • TECHNICAL SPECIFICATIONS 1.0 GENERAL I. SITE INVESTIGATInF AND REPRESENTATION THE CONTRACTOR ACKNOWLEDGES THAT HE RAS SATISFIED HIMSELF AS TO THE NATURE AND LOCATION OF THE WORK, THE GENERAL AND LOCAL CONDITIONS, PARTICULARLY THnSF. BEARING U'nN AVAILABILITY OF TRANSPORTATION, DISPOSAL, HANDLING AND STODGE OF MATERIALS, AVAILABILITY OF LABOR, WATER, ELECTRIC POWFR, ROADS, AND • UNCERTAINTIES OF WEATHER, RIVER STAGES, OR SIMILAR PHYSICAL CONDITIONS AT THE SITE, THE CONFORMATION AND CONDITIONS OF THE GROUND, THE CHARACTER OF F.OUIPMF.NT AND FACILITIES NEEDED PRELIMINARY TO AND DURING THE PROSECUTION OF THE. WORK AND ALL OTHER MATTERS WHICH CAN IN ANY WAY AFFECT THE WORK OR THE COST THEREOF UNDER THIS CONTRACT. THE. CONTRACTOR FURTHER ACKNOWLEDGES THAT HE HAS SATISFIED HIMSELF AS TO THE CHARACTER, DUALITY. AND OVANTITY OF SURFACE AND SUBSURFACE MATERIALS TO BF. ENCOUNTERED FROM INSPECTING THE SITE, ALL EXPI.P'ATORY WORK DONE BY THE MINER, • AS WELL AS FROM INFORMATION PRESENTED BY THE DRAWINGS AND SPECIFICATIONS MADE, A PART OF THIS CONTRACT, 2. INFOSMA' .a ON SITE CONDITIONS ALL INFORMAT'ON OBT?INED BY THE CITY REGARDING SITE CONDITIONS, SUBSURFACE INFORMATiON, GROUNDWATER ELEVATIONS, EXISTING CONSTRUCTION OF SITE FACILITIES AS APPLICABLE., AND SIMILAR DATA WILL BE AVAILABLE: FOR INSPECTION AT THE OFFICE. OF THE CITY UPON REQUEST. SUCH INFORMATION IS OFFERED AS SUPPLEMENTARY INFORMATION ONLY, NEITHER THE. ENGINEER NOR THE OWNER ASSUMES ANY RESPONSIBILITY FOR THE COMPLETENESS OR INTERPRETATION OF SUCH SUPPLEMENTARY INFORMATION, WHEN A LOG OF TEST BORINGS SHOWING A RECnRD OF THE DATA OBTAINED BY THE ENGINEER'S INVESTIGATIONS OF SUBSURFACE CONDITIONS IS INCLUDED AS A PART OF THE CONTRACT OOCUMENTS, SAID LOG REPRESENTS ONLY THE OPINION OF TIE ENGINEER AS TO THE CHARACTER OF THE MATERIALS ENCOUNTERED BY HIM IN HIS TEST BORINGS AND IS INCLUDED ONLY FOR THE CONVENIF.NCF. OF THE BIDDERS, J. TEMPORARY WATER WATER IS AVAILABLF. AT THE FIRE HYDRANT BETWEEN WELL NO. 9 AND THE. • OBSERVATION WELL. THE CONTRACTOR SHALL OBTAIN A METER AT THE CITY SHOPS AND SHALI. USE: IT FOR MEASURING IMF WATER USED FROM THE HYDRANT. THE CONTRACTOR WILL NOT By C,FARGFD FOR WATER USAGE. 45 W 66S TECHNICAL SPECS. DECEMBER 1982 • A. TEMPORARY ELECTRIC POWER HAKE ARRANGEMENTS FOR ELECTRICAL POWER FOR USE DURING THE CONSTRUCTION PERIOD AND PAY ALL COSTS FOR SAME. 5. SANITARY FACILITIES THE CONTRACTOR AND HIS EMPLOYEES AND THOSE. OF HIS SUBCONTRACTORS MAY USE THE PUBLIC RF.STROOMS IN THE PARK AREA. THE CONTRACTOR SHALL TARE SPECIAL CARE NOT TO UNDULY ENCUMBER 'THE RESTROOMS SO AS TO BE INCONVENIENT FOR THE GENERAL PUBLIC'S USE, AND SHALL MAKE EVERY EFFORT TO KEEP THE RESTRDOMS CLEAN. THE CONTRACTOR • SHALL KEEP ON HAND A BROOM TO PERIODICALLY SWEEP MUD AND DIRT OUT OF THE RESTROOMS WHICH MAY HAVE BEEN LEFT BY THE CONTRACTOR'S ACTIVITIES. 6. DAMAGE. TO EXISTING FACILITIES WHERE ANY EXISTING STRUCTURES OR FALL..''' ARE DAMAGED BY THE CONTRACTOR DURING CONSTRUCTION, THE CONTRACTOR SHALL PROMPTLY • REPAIR OR REPLACE THE DAMAGED PORTION OR FACILITY AT NO ADDITIONAL COST TO THE OWNER, 7. STORAGE OF MATERIALS MATERIALS SHALL. BE SO STORED AS TO INSURE THE PRESERVATION OF THEIR DUALITY AND FITNESS FOR THE WORK. WHEN CONSIDERED NECESSARY, THEY SHALL RF. PLACED ON WOODEN PLATFORMS OR OTHER HARD, CLEAN SURFACES, AND NOT ON THE GROUND, AND/OR THEY SHALL. RE PLACED TINDER COVER. STORED MATERIALS SHALL BE LOCATED SO AS TO FACILITATE PROMPT INSPECTION. MATERIALS MAY HE STORED IN THE SOUTHWEST PORTION OF THE. PARKING LOT, BUT SHALL NOT RNCUMBFR AN AREA LARGER IRAN 60 FEET BY 60 FEET IN THE PARKING AREA. R. CONTRACTOR'S EXPERIENCE: T4F. CONTRACTOR SHALL HAVE. NOT LESS THAN FIVE (5) YEARS' EXPERIENCE IN DRILLING AND DEVELOPING WELLS WITH A DIAMETER OF 24 INCHES OR MORE, 100 FEET DEEP, AND WITH A CAPACITY OF 7,000 GPM OR MOHR. IF REOUIRED, THE CONTRACTOR SHALL SITMIT EXPERIENCE. RECORDS TO THE CITY WITH OTHER PERTINENT INFORMATION THAT WILL INDICATE. ABILITY TO SATISFACTORILY PERFORM THE WORK. THE. CONTRACTOR SHALL, DEMON! 'RATE THAT HE HAS AVAILABLE THE NECESSARY • BOUIPMENT IN GOOD WORK.NG ORDER TO SATISFACTORILY COMPLETE THE WORK. THE CITY SHALL HAVE THE RIGHT TO REJECT ANY BIDDER'S PROPOSAL ON THE GROUNDS OF APPARENT LACK OF EXPERIENCE OR AVAILABILITY OF EOUIPMENT. 46 W 665 TECHNICAL. SPECS. DECEMBER 1982 9, DAMAGE TO LANDSCAPING THE CONTRACTOR SHALL USE THE L`TMOST CARE IN EXECUTING THE WELL DRILLING AND DEVELOPMENT TO DISRUPT AS LITTLE OF THE PARK AS NECESSARY. THE CONTRACTOR IS REOUIRED TO FENCE HIS CONSTRUCTION OPERATION AND IS RESPONSIBLE FOR DAMAGE TO HIS EQUIPMENT, PUBLIC IN-JURY, AND WELL CONTAMINATION. THE CONTRACTOR SHALL RESTORE ALL LANDSCAPED AREAS TO A CONDITION F.OUAL TO OR BETTER THAN THE. SITE BEFORE THE CONSTRUCTION OPERATION. 2.0 WASTE MATERIAL, WASTEWATER AND DISPOSAL 2.1 GENERAL 1. SCOPE WORK COVERED IN THIS SECTION INCLUDES 'fHF. HANDLING AND DISPOSAL OF WASTE. MATERIAL AND WASTEWATER. • 2.2 MATERIAL I. WASTE. MATERIAL5 ALL EXCAVATED MATERIAL RESULTING FROM THE WELL DRILLING OPERATION SHALT. BE PLACED WITHIN THE STRAW BERM AREA AS SHOWN ON THE PLANS. SAND, GRAVEL, AND ROCKS ,SHALL BE SEGREGATED FROM THE CLAY, PEAT, AND MUCK WITHIN THE BERM AREA TO THE. EXTENT PASSIBLE. AT THE COMPLETION OF THE CONTRACT, THE CONTRACTOR SHALT. REMOVE ALA. CLAY, PEAT, AND MUCK FROM THE CONSTRUCTION AREA AND SHALT. DISPOSE OF IT AT A CITY-APPROVED DISPOSAL SITE. THE SAND, GRAVEL, AND ROCKS SHALT REMAIN ON THE SITE AND SHALL BE EVENLY GRADED BY THE CONTRACTOR TO BE. USED AS FOUNDATION MATERIAL. FOR THE FUTURE WELL BUILDING, REMOVE STRAW RALF.S AT COMPLETION OF CONTRACT. 2. WASTEWATERS WATER RESULTING FROM WELT, DEVELOPMENT CAN BE PLACED WITHIN THE STRAW BERM AND ALLOWED TO INFILTRATE. WATER RESULTING FROM TESL' PUMPING OPERATIONS SHALT. BE PIPED ABOVE • GRADE. AND DISCHAR:ED IN EITHER THE. CEDAR RIVER OR IMF. METRO 42-INCH SEWER INTERCEPTOR. THE CITY WILL SELECT THE. DISCHARGE SITE. AFTER THE BID AWARD. IN NO EVENT WILL THE. WATER BE PIPED A DtSTANCE GREATER THAN 1,200 FEET FROM THE WELL. THE CONTRACTOR 47 W 665 TECHNICAL SPECS. DECEMBER 1982 • SHALL LA' A 16-INCH PIPELINE ABOVF. GRADE WITH SUITABLE SUPPORT AND THRUST RESTRAINT TO CARRY THE WATER FROM THE. PUMP TEST TO EITHER THE RIVER OR THE SEWER. +' CONTRACTOR SHALL MAINTAIN THE PIPF DURINC PUMPING OPERATIONS. 2.3 PAYMENT NO SEPARATE OR ADDITIONAL PAYMENT WILL RE MADE FOR THE WORK AND/OR MATERIALS SPECIFIED HEREIN. ALL COSTS OF SUCH WC"K AND/OR MATERIALS SHALT. BE CONSIDERED AS INCIDENTAL TO THE PROJECT AND SHALL BE INCLUDED IN THE APPROPRIATE UNIT OR LUMP SLIM BID PRICE, • 3.0 24-INCH WELL 9 CONSTRUCTION - SCHEDULE A 3.1 GENERAL 1. SCOPE • THE WORK COVERED IN THIS SECTION INCLUDES ALL LABOR, EQUIPMENT, MATERIALS, TOOLS, AND SERVICES REQUIRED TO DRILL, CASE, SCREEN, SEAL, DEVELOP, TEST PUMP, AND CAP A 24-INCH PRODOCTION WELL AS SPECIFIED HEREIN. 2. STANDARD SPFCIFICAT'IONS ALI, WORK AND MATERIALS AND THE CONSTRUCTION OF THE WELL SHALL CONFORM TO THE REOUIRF.MENTS OF CHAPTER 173-160 WAC, MINIMUM STANDARDS FOR CONSTRUCTION AND MAINTENANCE OF WATER WELLS. AND AWWA A100 UNLFSS MODIFIED HEREIN. HIGHER STANDARDS OR PROCEDURES AS CALLED OUT IN THESE. SPECIFICATIONS SHALL PREVAIL. 3. SUBMITTALS THE CONTRACTOR SHALL SUBMIT THE FOLLOWING PROJECT DATA PRIOR TO WELL CONSTRUCTION: 1. MANUFACTURER'S CERTIFICATION OF CONFORMANCE OF CASING MATERIALS TO SPECIFICATIONS. 2. MANUFACTURER'S DESCRIPTIVE DATA INDICATING MATERIALS OF CONSTRUCTION AND CONFIGURATION OF SCREEN. • 3. DESCRIPTIVE DATA AND DRAWINGS INDICATING F.OUIPMENT, MATERIALS, AND PROCEDURES TO BE Ir'ILIZED IN THE FOLLOWING: 48 W 665 TECHNICAL SPECS. DECEMBER 1982 • 1. WELL DEVELOPMENT, 2. WASTEWATER DISPOSAL (INCLUDING ABOVE-GRADE PIPELINE.) 3. TEST PUMPING, 4. SURFACE SEALING, 5. DISINFECTION. 4. CONFIGURATION AND YIELD OF WELL THE WELL SHALL RE CONSTRUCTED BY THE CONTRACTOR AS SHOWN ON THE • PLANS AND SHALL INCLUDE BUT NOT BE LIMITED TO THE FOLLOWING COMPONENTS: 1. FULL LENGTH 24" CASING EXTENDING FROM 2 FEET ABOVE THE GROUND SURFACE TO THE DEPTH DESIGNATED BY THE CITY DURING DRILLING OF THE WELL. 2. CONTINUOUS WIRE WOUND SLOT-TYPE WELL SCREEN SEALED TO THE CASING WITH A NEOPRENE PACKER. 3. GROUT SEAL PLACED AROUND THE CASING ANO EXTENDING TO 20 FEET BELOW THE. GROUND. 4. TACK WELDED CAP. THE. WELL SHALL RE DRILLED AND DEVELOPED BY THE. CONTRACTOR FOR A MAXIMUM POSSIBLE YIELD. THE. "TELD DESIRED BY THE. OWNER IS 1,500 GALLONS PER MINUTE, THE: DEPTH OF THE WELL AND THE SPECIFIC LOCATION OF THE, WELL SCREEN AND THE STRATUM TO BE DEVELOPED WILL BE SELECTED BY THE ENGINEER DURING THE DRILLING OPERATIONS. THE CONTRACTOR SHALL PROVIDE ANY AND ALI. INFORMATION WHICH MAY BE OBTAINED OR DERIVED DURING THE. DRILLING TO ASSIST IN ACHIEVING THE DESIRED YIELD. S. WELL LOCATIONS THE CYTY WILL STAKF AND ESTABLISH THE LOCATION OF THE WELL. 3.2 MATERIALS 1, WELL CASING . CASING STRINGS SHALL BE NEW BLACK STEEL PIPE, SEAMLESS OR WELDED, IN ACCORDANCE WITH AMERICAN PETROLEUM INSTITUTE. STANDARD 51. OR EQUIVALENT ASTM OR ANSI STANDARDS. THE. SURFACE SEAL CASING SHALT. 49 W 665 TECHNICAL SPECS. DECEMBER 1982 BE 30-INCH NOMINAL PIPE. THE FULL LENGTH CASING SHALL BE 24-INCH NOMINAL DIAMETER PIPE WITH WALL THICKNESS OF NOT LESS THAN 0.375-INCH, AND WEIGHING NOT LESS THAN 94.60 POUNDS PER FOOT OF CASING. THE TEMPORARY SURFACE. CASING MAY BE NEW OR USED AT THE OPTION OF THE CONTRACTOR. 2. CASING DRIVE SHOE. THE LOWER END OF THE CASING SHALT. BE FITTED WITH A NEW DRIVE SHOE. OF THE MATERIALS AND CONFIGURATION REQUIRED TO PREVENT DAMAGE OR DISTORTION TO THE CASING DURING WELL DRILLING. THE SHOE SHALL HAVE A BEVELED AND TEMPERED CUTTING EDGE OF FORGED, CAST, OR FAHRICATED METAL AS REQUIRED BY THE DRILLING METHOD AND • SUBSURFACE SOILS CONDITIONS. 3. WELL SCREEN WELL SCREF.F. SMALL RE. 24-INCH TELESCOPING, STAINLESS STEEL, CONTINUOUS SLOT CONSTRUCTED BY THE. WINDING OF TRIANGULAR CROSS-SECTION WIRE SPIRALLY AROUND A CIRCULAR ARRAY OF • LONGITUDINAL RODS AND JOINING EACH ROD AND WIRF. INTERSECTION BY WELDING. ALL SCREENS SHALL BE MANUFACTURED BY JOHNSON DIVISION, UOP, INC., A.D. COOK COMPANY, OR APPROVED EQUAL. THE: WIDTH OF THE SLOT OPENING AND LENGTH OF THE SCREEN ASSEMBLY WILL BE DETERMINED BY THE CITY DURING CONSTRUCTION OF THE WELL. THE SCREEN SHALL BE FITTED WITH A NEOPRENE FIGURE 'K" PACKER FITTING AT THE TOP, A CLOSED RAIL PLUG AT THE BOTTOM AND ANY AND ALL OTHER APPURTENANCES AND ACCESSORIES WHICH MAY BE REQUIRED FOR PROPER INST4LLATION AND OPERATION OF THE, SCREEN. 4. CEMENT GROUT FOR SURFACF. SEAL CRMFNT GROUT FOR THE SURFACE SEAL SHALT. BE A MIKTURK OF 4 POUNDS OF POWDERED COMMERICAL RENTONITF. AND NOT MORE THAN 7 GALLONS OF CLEAN WATER PER 94 POUND RAG OF PORTLAND CEMENT, CONFORMING TO ASTM CI50, TYPE. 11. 5. WELL CAP THE TOP OF THE 24-INCH CASING SHALT. RE FITTED WITH A TACK WELDED CAP THAT WILL PREVENT POLLUTANTS FROM ENTERING THE. WELL. 6. N.ACKFILL • BACKFILL MATERIAL FOR DRILL HOLES SHALT. BE CLEAN PEA GRAVEL, AS APPROVED BY THE CITY. 50 W 665 TECHNICAL SPECS. DECEMBER 1992 3.1 WORKMANSHIP 1. DRILLING THE WELL SHALL BE DRILLED BY THE CABLE TOOL METHOD USING WATER. OTHER METHODS SHALL NOT BL USED AND WILL NOT RE ACCEPTED BY THE CITY. THE CONTRACTOR SHALL PROVIDE A CABLE. TOOL DRILLING RIG CAPABLE OF REACHING THE DESIRED DEPTH. THE. DRILLING OPERATIONS SHALL ALLOW THE. CASING STRING TO BE INSTALLED IN CONJUNCTION WITH DRILLING, AND SHALL ALLOW THE. CASING TO BE WITHDRAWN AT ANY TIME AND SHALL ALLOW THE PERFORMANCE: OF ANY AND ALI. OTHER REQUIRED WORK. THE DEPTH SHALL BE DETERMINED BY THE CITY. WATER AND CUTTINGS REMOVED FROM THE WELL DURING THE DRILLING OPERATIONS SHALL BE DISPOSED OF AS SPECIFIED. 2. INSTALLATION OF CASING THE INSTALLATION OF THE CASING SHALL BE CARRIED WITH THE DRILLING AND SHALL HE MAINTAINED WITHIN I FEET OF THE BOTTOM OF THE HOLE. • THE CASING STRING SHALL BE ASSEMBLED BY RLTTT WELDING THE PIPE SECTIONS. WELDING SHALT. BE FALL CONTINOUS RUNNING WELDS, THE FULL THICKNESS OF -HE PIPE WALL, AND SHALL RE IN ACCORDANCE WITH APPLICABLE. STANDARDS OF THE AMERICAN WELDING SOCIETY, ALL JOINTS SMALL BE WATERTIGHT. I. WELL. ALIGNMENT AND PLUMBNESS TEST THE WELL FOR PLUMBNESS AND ALIGNMENT AFTER GROUTING. PLUMBNESS SHALL BE TESTED AS DETAILED IN WA SECTION AI.6.2 TO A DEPTH OF 100 FEET. ALIGNMENT SHALL BE TES'CED AS DETAILED IN AWA SECTION AI-9.4 TO A DEPTH OF 100 FEET. THE WELL SHALT. RE CONSIDERED OUT OF PLUMB IF THE. DUMMY DOES NOT MOVE FREELY. THE WELL SHALL BE OUT OF ALIGNMENT IF THE. CASING VARIES BY MORE THAN fHRER INCHES SIDE TO SIDE, AT ANY TWO POINTS ALONG THE VERTICAL CASING. IF THE WELL IS OUT OF PLUMB OR ALIGNMENT, IT SHALT, BE CORRF..TFII BY THE CONTRACTOR AT HIS OWN EXPENSE. SHOULD HE FAIL TO CORRECT ALIGNMENT OR PLUMBNESS, THE CITY MAY REFUSE TO ACCEPT THE WELL. THE CONTRACTOR SHALL NOTIFY THE CITY THREE. DAYS PRIOR TO PERFORMING THE TESTS. 4. ABANDONMENT ANY WELL THAT DOES NOT MEET THE ALIGNMENT, PLUMBNESS OR OTHER • REOUIREMENTS, OR ANY WELL ON WHICH THE. CONTRACTOR STOPS WORK PRIOR TO COMPLETION WILL RE ABANDONED, A NEW WELL SHALL BE STARTED IN THE: IMMEDIATE VICINITY AT A LOCATION DESIGNATED MY THE. CITY. NO PAYMENT WILL BE. MADE FOR ANY WORK ON AN ABANDONED WELL. 51 W 665 TECHNICAL SFECS. DECEMBER 19PS • AN ABANDONED WELL SHALL BE BACKFILLED AND SEALED IN ACCORDANCE WITH THE REQUIREMENTS OF WAG 173-160 AND AWWA SECTION AI-Il AND AS APPROVED BY THE CITY. 5. DRILLING REPORT DURING DRILLING, DEVELOPMENT AND TESTING OF THE WELL THE CONTRACTOR SMALL PREPARE, ON A DAILY BASIS, A DETAILED DF.LLING REPORT. THE REPORT SHALT. INCLUDE, BUT NOT BE LIMITEL '..., THE FOLLOWING: 1. DEPTH DRILLKO AND LENGTH OF CASING INSTALLED DURING EACH WORK . SHIFT. 2. NUMBER OF HOURS OF ACTUAL DRILLING DURING EACH WORK SHIFT. ). DEPTH AND THICKNESS OF E.IH SPECIFIl' STRATUM. DETA.-KO IDENTIFICATION AND DESCR ^TION OF THE MATERIAL OF WHICH EACH STRATUM IS COMPOSFO. • 5. RATE. OF PF.NF.TRATION OF DRILLING OF EACH STRATUM. A. WATER LEVEL IN THE WELL AT THE. BEGINNING AND Fs' OF EACH SHIFT. THE DRILLING REPORT SHALL FR PREPARED AND MAINTAINED, ON A DAILY BASIS, NY THE CONTRACTOR RFGAHDLESS OF RECORDS AND LOGS PREPARED BY THE CITY. THE CITY SHALT. HAVE. ACCESS TO THE CONTRACTOR'S LOG AT ALL TIMES AND A COPY SHALL BE FURNISHED TO THE CITY FOR EACH DAY WHILE. THE WORK IN IN PROGRESS. THE CONTRACTOR SHALL BE COMPLETELY RESPONSIBLE. FOR SUBMITTING THE NECESSARY LOGS, RECORDS .AND REPORTS TO THE. STATE OF WASHINGTON DEPARTMENT OF ECOLOGY AS RROUIRF.O BY STATE REGULATIONS. 6. MATERIAL SAMPLING THE. CONTRACTOR SHALL OBTAIN SAMPLES OF MATERIALS ENCOUNTERED AT TEN (10) FEET INTERVALS ABOVE THE. ZONE OF SATURATION, FIVF (5) FEET INTERVALS BELOW THE. ZONE OF SATURATION, WHENEVER A MOISTURE CHANGE IS NOTED, OR AT TH", DEPTOF AND IN THE FREQUENCY, MANNER, FOAM AND QUANTITY DIRECTED BY THY. CITY FOR ANALYSIS BY THE CITY. EACH SAMPLE SHALL BE DEPOSITED FROM THE RAILER ONTO A CLEAN BOARD • OR TROUGH, MIXED TO OBTAIN A UNIFORM RFPRESFNTATIVE SAMPLE, SEPARATELY PACKAGED AND IDENTIFIED AS DIRECTED BY THE lJTY AND SMALL BE STORED AND PROTECTED UNTIL REMOVED FROM THE WORK AREA BY THE CITY. SAMPLE CONTAINERS SHALL BE PROVIDED BY THE CONTRACTOR, AND SHALL BE CLEARLY MARKED AS NECESSARY TO FACILITATE THE STUDY OF THE SUBSURFACE CONDITIONS. 52 W 665 TECHNICAL SPECS. DECEMBER 1992 7. INSTALLATION OF WELL SCREEN THE WELL SCREEN SHALL BE INSTALLED BY THE. PULL-BACK METHOD, AND THE CONTRACTOR SHALL RAVE ADEOVATE JACKS TO ENABLE "HE CASING TO BE PULLED BACK TO EXPOSE THE SCREEN. THE CASTNC STRING SHALL BE ADVANCED THROUGH THE FORMATION TO BE SCREENED AND THE HOLE CLEANED OUT TO THE LEVEL WHERE. THE BOTTOM OF THE SCREEN IS TO BE PLACED. THE SCREEN SHALL THEN BE LOWERED TO THAT LEVEL WITH A CABLE ATTACHED TO THE BAIL IN THE BOTTOM OF THE SCREEN. THE SCREEN SHALL BE TEMPORARILY HELD AT THE REOIIIRED LEVEL AND THE CASING RAISED UNTIL THE SCREEN IS EXPOSED AND THE. PACKER IS POSITIONED APPROXIMATELY 12 INCHES FROM THE END OF THE CASING. • THE WELL SCREEN SHALL BE INSTALLED IN ACCORDANCE WITH THE INSTRUCTIONS OF THE KANUFACITIRER. B. WELL DEVELOPMENT DEVELOPMENT OF THE WELL SHALL BE PERFORMED BY THE CONTRACTOR TO REMOVE. SAND AND FINE MATERIAL FROM THE STRATUM PENETRATED BY THE • WELL SCREEN AND TO STABILIZE THE REMAINING SAND AND FINE MATERIAL IN THE STRATUM SO THAT THE WELL WILL YIELD WATER WITH A LOW SETTLEABLE AND SUSPENDED SOLIDS CONTENT. THE CONTRACTOR SHALL NOTIFY THE CITY NOT LESS THAN TWO (2) W�IRKING DAYS IN ADVANCE, TO THE DATE. AND TIME WHEN WELL DEVELOPMENT OPERATIONS WILL BE STARTFO. TPA DATE AND TIME. SELECTED SHALL BE A REGULAR DAY SHIFT, MONDAY THROUGH FRLDAY, KXCI.UDING HOLIDAYS, THE. WELL SHALT. BE DEVELOPED BY SURGING WITH A SURGE ELOCK OPERATED BY THE. DRILLING ACTION OF THY. CABLE. TOOL RIG. THE SURGING EOUIPMENT SHALL CONSIST OF A VENTED SURGE BLOCK ATTACHED TO A DRILL STEM OR STRING OF PIPE„ THIS SYSTEM SHALL BE CAPABLE OF OPERATING THE SURGE BLOCK AT A RATE. OF 'TWENTY TO FIFTY, 24 TO 36 INCH STROKES PER MINUTE. THE. FOUIPMF.NT AND METHOD SRALL BE APIROVED BY THY CITY. WATER REMOVED FROM THE WELL DURING DEVKLOPMF.NT SHALL BE DEPOSITED WITHIN THY. STRAW BERM. • 53 w. W 665 TECHNICAL SPECS. DECEMBER 1982 • THE CONTRACTOR SHALL FURNISH AND OPERATE THE EOUIPMENT AND APPURTENANCES NECESSARY TO OBTAIN WATER SAMPLES, MEASURE THE WELL PUMP FLOW AND CONTROL THE PUMP FLOW WHILE DISCHARGING THE WATER INTO THE. WASTEWATER DISPOSAL SYSTEM. THE EQUIPMENT AND PROCEDURE SHALL BE APPROVED BY THE CITY. WATER PUMPED FROM THE WELL DURING PUMPING TESTS SHALL BE DISCHARGED TO THE WASTEWATER DISPOSAL SYSTEM PROVIDED BY THE CONTRACTOR AS SPECIFIED. ' HE CONTRACTOR SHALL NOTIFY THE CITY NOT LESS THAN THREE (1) WORKING DAYS IN ADVANCE, TO THE DATE AND HOUR WHEN THE CONTRACTOR WILL BE PREPARED TO START PUMPING TEST OPERATIONS. THE DATE AND • HOUR SELECTED SHALL BE A REGULAR DAY SHIFT, MONDAY THROUGH WEDNESDAY, EXCLUDING HOLIDAYS. THE SHORT-TERM PUMPING TEST SHALL CONSIST OF PUMPING AT VARIABLE FLOW RATES FROM $00 TO 3.500 GPM FOR APPROXIMATELY B HOURS. THE TANG-TEKM CONSTANT FLOW PUMPING TEST SHALL BE STARTED AFTER THE WELL HAS RECOVERED TO ITS ORIGINAL WATER LEVEL AS DETERMINED BY THE CITY, OR AT LEAST 12 HOURS AFTER THE SHORT-TERM STEP FLOW • PUMPING TEST HAS BEEN COMPLETED. THE LONG-TERM PUMPING TEST SHALL BE RUN AT A FLOW RATE OF 3,500 GPM FOR A CONTINUOUS TIME PERIOD UP TO 40 HOURS, DURING THE LONG-TERM CONSTANT FLOW P, *ING TEST, THE CONTRACTOR SHALL CONTINUOUSLY CHECK AND ADJUST rRE PUMP DISCHARGE WITHIN PLUS OR MINUS 5 PERCENT OF THE REQUIRED RATE. THE STEP TEST SHALL BE STARTED AFTER THE WELL HAS RECOVERED TO 90 PERCENT OF ITS ORIGINAL WATER LEVEL AS DETERMINED BY THE CITY. THE. STEP TEST SHALL BE RUN AT VARIABLE RATES BETWEEN 1,000 AND 3,500 GALLO,AS PER MINUTE FOR APPROXIMATELY 4 HOURS, AS DETERMINED BY THE CITY. 10. SEALING OF CASING A CEMENT GROUT SEAL SHALL BE PLACED IN THE ANNULUS BETWEEN THE 24-INCH CASING AND 30-INCH CASING FOR A MINIMUM DEPTH OF 20 FEET BELOW THE GROUND SURFACE PRIOR TO OR ON COMPLETION OF THE WELL. THE CASING SHALL BE CENTERED WITHIN THE HOL- TO ASSURE A COMPLETE. SEAL OF 1-112 INCHES MINIMUM THICKNESS. NO WOR', SHALL BE DONE. ON THE WELL FOR A MINIMUM PERIOD OF 72 HOURS FOLLOWING PLACING OF THE SEAL. THE CEMENT GROUT PLACEMENT METHOD SHALL BE IN ACCORDANCE WITH THE REOUIREMENTS OF WAC 173-160, SEALING OF UNCONSOLIDATED FORMATION WITHOUT SIGNIFICANT CLAY BEDS AND AWWA • AI-5 AND SHALL BE APPROVED BY THE. CITY. 55 W 66, TECHNICAL SPECS. DECEMBER 1982 • 9. PIMPING TEST PUMPING TEST SHALL, BE CONDUCTED AS FOLLOWS: 1. SHORT TERM VARIABLE PUMPING TEST TO FINISH DEVELOPMENT AND DETERMINE. A PUMPING RATE FOR THE LONG TERM TEST. 2. LONG TERM CONSTANT RATE PUMPING TEST. 3. STEP TEST TO ALLOW EVALUATION OF WELL EFFICIENCY. THE CONTRACTOR SHALL FURNISH, INSTALL, OPERATE AND REMuVE ALL PUMPING EQUIPMENT, THROTTLING DEVICES, VALVES, PIPING, MEASURING INSTRUMENTS AND THE WASTEWATER DISPOSAL CONVEYANCE SYSTEM REQUIRED FOR PUMPING TESTS OF THE WELLS, AND SHALL PROVIDE PERSONNEL TO CONTINUOUSLY OPERATE AND MAID":'AIN THE EQUIPMENT DURING THE PUMPING TESTS. THE PUMPING EQUIPMENT SHALL BF. CAPABLE OF DISCHARGING AT LEAST 3,5O0 GALLONS PER MINUTE UNDER THE CONDITIONS IMPOSED BY THE WATER LEVEL IN THE WELL .AND THE DISCHARGE PIPING. THE PUMPING • EQUIPMENT SHALL INCLUDE. ALL REQUIRED ELECTRICAL AND MECHANICAL ACCESSORIES, APPURTENANCES AND CONTROLLERS FOR PROPER AND CONTINUED OPERATION OF THE PUMP !`GAING THE TESTING PERIOD. THE PUMPING EQUIPMENT AND POWER SOURCE SHALL BE CAPABLE OF CONTINUOUS OPERATION FOR UP TO 40 HOURS WITHOUT STOPPING FOR MAINTENANCE OR OTHER CAUSES, THE PUMP LOCATION IN THE WELL SHALL RE APPROVED BY THE CITY. THE POWER SOURCE MAY BE EITHFR ELECTRICAL SERVICE, AN ENGINE GENERATOR OR AN ENGINE WITH DIRECT DRIVE. THE CONTRACTOR SHALT. MAKE ALL ARRANGEMENTS FOR ELECTRICAL SERVICE BY THE UTILITY COMPANY AND SHALL PERFORM ALL ELECTRICAL WORK AND PROVIDE, AND INSTALL ALL ELECTRICAL WIRING AND DEVICES FOR OPERATION OF THE. PUMP. THE CONTRACTOR SHALL PROVIDE ALL FITTINGS, A 2 INCH DIAMETER ACCESS PORT, AND A 1-1/2 INCH DIAMETER PIPE FROM THE: TOP OF THE WELL TO THE PUMP BOWLS, AND APPURTENANCES REQUIRED FOR MEASUREMENT, BY THE CITY, OF THE WATER LEVEL IN THE WELL. THE CITY WILL PROVIDE AND USE, CABLE SUSPENDED STRAIN GAUGES WITH INDICATORS FOR WELL LEVEL MEASUREMENT. THE CONTRACTOR SMALL. ASSIST THE CITY IN THE MEASURING OF THE WATER LEVEL AS MAY BE REQUESTED BY THE CITY. THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE ABILITY TO OBTAIN WATER LEVEL • MEASUREMENTS DURING THE. PUMPING TEST. IF THE ACCESS PORT, PIPE. OR OTHER APPURTENANCES REQUIRED BY THE CITY FOR WATER LEVEL MEASUREMENTS DO NOT ALLOW THE CITY TO OBTAIN WATER LEVEL MEASUREMENTS DURING THE TEST, THEN THE TEST SHALL BE RESTARTED AFTER A RECOVERY PERIOD DETERMINED BY THE CITY. THE COSTS FOR THE ABORTED TEST WILL BE BORNE BY THE CONTRACTOR. W 6b5 TECHNICAL SPECS. DECEMBER 1982 • It. DISINFECTION THE CONTRACTOR SHALL DISINFECT THE. WELL IN ACCORDANCE WITH TILE REQUIREMENTS OF W4C 173-160-240, AND AWWA Al-7, DISINFECTION. 12, CAPPING AFTER COMPLETION OF DISINFECTION, THE CONTRACTOR SHALL PLACE A TACK WELDED CAP ON THE WELL CASING. 13. WATER SAMPLING • WATER SAMPLES SHAL1. RI, TAKEN FROM THE WELL dY THE CONTRACTOR AT THE END OF WELL DEVELOPMENT AND DURING THE PUMPING TESTS AS REQUIRED BY THE CITY. 4.0 R-INCH OBSERVATION WELL CONSTRUCTION - SCHEDULE B 4.1 GENERAL 1. SCOPE THE WORK COVERED IN THIF SECTION INCLUDES ALL LABOR, EQUIPMENT, MATERIALS, TOOLS AND SEKVICES REQUIRED TO DRILL, CASE„ FERFORATE, SEAL, DEVELOP, AND CAP A WATER OBSERVATION WELL AS SPECIFIED HEREIN. 2. STANDARD SPECIFICATIJNS ALL WORK AND MATERIALS AND THE. CONSTRUCTION OF THE WELL SHALL CONFORM TO THE REQUIREMENTS OF CHAPTER 173-160 WAG, MINIMUM STANDARDS FOR CONSTRUCTION AND MAINTENANCP OF WATER WELLS AND AWWA A100, UNLESS MODIFIED HEREIN. HIGHER STANDARDS OR PROCEDURES AS CALLED OUT IN THECE SPECIPICAT ONS SHALL PREVAIL, 3, SUBMITTALS THE CONTRACTOR SHALL SUBMIT THE FOLLOWING PROJECT DATA PRIOR TO WELL CONSTRUCTION: • 56 W 665 TECHNICAL SPECS. DECEMBER 1982 • 1. MANUFACTURER'S CERTIFICATION OF CONFORMANCE OF CASING MATERIALS TO SPECIFICATIONS: 2. DESCRIPTIVE DATA AND DRAWINGS INDICATING EOUIPPENT, MATERIALS, AND PROCEDURES TO BE UTILI7F.D IN THE POLL.OWINI:: 1. WELL DEVELOPMENT 2. SURFACE SEALING L. LOCKING CAP 4. DISINFECTION 4. CONFIGURATION OF WELL, • THE OBSERVATION WELL SHALL BE CONSTRUCTED BY THE CONTRACTOR AS SHOWN ON THE PLANS AND SHALL 1NCLUP°, BUT NOT BE LIMITED T0, THE FOLLOWING COMPONENTS: 1. A-INCH DIAMETER FULL LENGTH CASING, EXTENDING FROM 2 F'F,ET ABOVE. THE GROUND SURFACE TO THE DEPTH DESIGNATED BY THE: CITY DARING DRILLING. OF THE WELL. • 2. A PERFORATED INTERVAL AS DETERMINED BY THE CITY. 1. GROUT SEAL PLACED AROUND THE CASING AND EXTENDINi, TO 20 FEET BELOW THE GROUND SURFACE. +. INSIDE. CASING SEAL TO BOTTOM OF PERFORATIONS. 5. PERMANENT LOCKING CAP. THE OBSERVATION WELL WILL BE CONSTRUCTED TO MONITOR THE RFFRCTS OF PUMPING. WELL 9. THE DEPTH ,F THE WFI.I.. AND THE SPECIFIC LOCATION OF THE WELL PERFORATIONS AND THE. STRATUM TO BE DEVELOPED WILL BE SELECTED BY THE. CITY DURING THE DRILLING OPERATIONS. THE: CONTRACTOR SHALL PROVIDE ANY AND ALI. INFORMATION WHICH MAY R%, OBTAINED OR DERIVED DARING THE DRILLING TO ASSIST IN ACHIP.VIN(: THE DESIRED WELL. 5. WELL LOCATION THE. CITY WILL STAKE AND ESTABLISH THE LOCATION OF THE WELL. • 57 W 665 TECHNICAL SPECS. DECEMBER 1992 • 4 2 MATERIALS 1. WELL CASING CASING SHALL BE BLACK STEEL PIPE, SEAMLESS OR WELDED, IN ACCORDANCE WITH AMERICAN PETROLEUM INSTITUTE STANDARD SL OR EQUIVALENT ASTM OR ANSI STANDARDS. THE SURFACE SEAL CASING SHALL BE 12-INCH NOMINAL INSIDE DIAMETER PIPE. THE FULL LENGTH CASING SMALL BE R-INCH NOMINAL INSIDE DIAMETER PIPE WITH WALL THICKNESS OF NOT LESS THAN 0.250 INCH, THE. TEMPORARY SURFACE. CASING STRINGS MAY BE NEW OR USED AT THE OPTION OF THE CONTRACTOR. • 2. CASING DRIVE SHOE. THE LOWER END OF THE CASING SHALL ''49 FITTED WITH A NEW DRIVE SHOE OF THE MATERIALS AND CONFIGURATION REQUIRED TO PREVENT DAMAGE. OR DISTORTION TO THE CASING. THE. SHOE SMALL HAVE. A BEVELED AND TEMPERED CUTTING EDGE OF FORCED, CAST OR FABRICATED METAL AS REQUIRED BY THC DRILLING METHOD AND SUBSURFACE SOILS , • 1. WELL CAP THE TOP OF THE R-INCH CASING SHALL BE FITTED WITH A CAP THAT WILL. PREVENT POLLLRANTS FROM ENTERING THE WELL AND CAN BE LOCKED IN THE CLOSED POSITION WITH A PADLOCK TO BE PROVTD D BY THE. OWNER. THE CAP SHALL BE WELDED TO THE CASING. THE CAP SHALL BE MANUFACTURED BY CAMPBELL OR EQUIVALENT. 4.3 WORKMANSHIP 1. DRILLING THE WELL SMALL BE DRILLED BY THE CABLE TOOL METHOD USING WATER. OTHER METHODS SHALL NOT BE USED AND WILL NOT BE ACCEPTED BY THE CITY. THE CONTRACTOR SHALL PROVIDE A CABLE TOOL DRILLING RIC CAPABLE OF REACHING THE DESIRED DEPTH. THE. DR.%LING OPERATION SHALL ALLOW THE CASING STRING TO ^E INSTALLED IN CONJUNCTION WITH DRILLING AND SHALL ALLOW THE. CASING, TO BE WITHDRAWN AT ANY TIME, AND SHALL ALLOW THE PERFORMANCE OF ANY AND ALI. OTHER REQUIRED WORK. TfIE DEPTH SHALL BE DETERMINED BY THE CITY. WATER AND CUTTINGS REMOVED FROM THE WELL DARING THE DRILLING OPERATIONS SHALL BE DISPOSED OF AS SPECIFIED. • 58 W 665 TECHNICAL. SPECS. DECEMBE.R 1982 N 2. INSTALLATION OF LASING THE INSTALLATION OF THE CASING SHALL RE CARRIED WITH THE DRILLING AND SHALL BE MAINTAINED WITHIN 3 FEET OF THE BOTTOM OF THE HOLE. THE CASING STRING SHALL BE ASSEMBLED BY BUTT WELDING THE PIPE. SECTIONS. WELDING SHALL BE FULL CONTINUOUS RUNNING WELDS FOR THE FULL THICKNESS OF THE PIPE WALL AND SHALL BE IN ACCORDANCE WITH APPLICABLE STANDARDS OF THE AMERICAN Wv"IING SOCIETY. ALL JOINTS SHALL BE WATERTIGHT. 3. WELL ALIGNMENT AND PLUMBNFSS • THE CASING SRALL BE KEPT STRAIGHT, PLUMB AND CONCENTRIC WITHIN THE LIMITS THAT WILL PERMIT SATISFACTORY INSTALLATION AND OPERATION OF WATER LEVEL MONITORING EOUIPMENT. SHOULD THE WELL PROVE UNSATISFACTORY TO THE CITY, THE WELL SHALL BE CONSIDERED AS ABANDONED. 4. ABANDONMENT • ANY WELL THAT DOES NOT MEET THE ALIGNMENT, PLUMBNESS OR OTHER REQUIREMENTS, OR ANY WELL ON WHICH THE CONTRACTOR STOPS WORK PRIOR TO COMPLETION WILL BE ABANDONED. A NEW WELL SHALL BE STARTED IN THE IMMEDIATE VICINITY AT A LOCATION DESIGNATED BY THE. CITY. NO PAYMENT WILL BE MADE FOR ANY WORK ON AN ABANDONED WELL. AN ABANDONED WELL SHALL BE BACKFTLLED AND SEALED IN ACCORDANCE WITH THE REQUIREMENTS OF WAG 173-160 AND AWW,� SECTION AI-Il, AS APPROVED BY THE CITY. 5. DRILLING REPORT DURING DRILLING, DEVELOPMENT AND TESTING OF THE WELL., THE CONTRACTOR SHALL PREPARE, ON A DAILY BASIS, A DETAILED DRILLING REPORT. THE REPORT SHALL INCLUDE, BUT NOT BE LIMITED TO, THE FOLLOWING: 1. DEPTH DRILLED AND LENGTH OF CASING. INSTALLED DURING EACH WORK SHIFT. 2, NUMBER OF HOURS OF ACTUAL DRILLING DURING EACH WORK SHIFT. 3. DEPTH HND THICKNESS OF EACH SPECIFIC STRATUM. • 59 W 665 TECHNICAL SPECS. DECEMBER 1982 4. DETAILED IDENTIFICATION AND DESCRIPTION OF THE MATERIAL OF WHICH EACH STRATUM IS COMPOSED. S. RATE OF PENETRATION OF DRILLING OF EACH STRATUM. 6. WATER LEVEL IN THE WELL AT THE BEGINNING AND END OF EACH SHIFT. THE DRILLING REPORT SHALL BE PREPARED AND MAINTAINED, ON A DAILY BASIS, BY THE CONTRACTOR REGARDLESS OF RECORDS AND LOGS PREPARED BY THE CITY. THE. CITY SHALL HAVE ACCESS TO THE CONTRACTOR'S LOG AT ALL TIMES • AND A COPY SHALL BE FURNISHED TO THE CITY FOR EACH DAY WHILE THE WORK IS IN PROGRESS. THE CONTRACTOR SHALL BE COMPLETELY RESPONSIBLE FOR SUBMITTING THE NECESSARY LOGS, RECORDS AND REPORTS TO THE STATE OF WASHINGTON DEPARTMENT OF ECOLOGY AS REOUIRF.D BY STATE REGULATIONS. 6. MATERIAL SAMPLING • THE CONTRACTOR. SHALL OBTAIN SAMPLES OF MATERIALS ENCOUNTERED AT TEN (10) FEET INTERVALS ABOVE THE ZONE OF SATURATION, FIVE (5) FEET INTERVAIS BELOW THE ZONE OF SATURATION, WHENEVER A MOISTURE CHANCE IS NOTED, OR AT THE DEPTHS AND IN THE FREOUENCY, MANNER, FORM AND QUANTITY DIRECTED BY THE CITY FOR ANALYSIS BY THE CITY. EACH SAMPLE SHALL BE DEPOSITED FROM THE RAILER ONTO A CLEAN BOARD OR TROUGH, MIXED TO OBTAIN A UNIFORM REPRESENTATIVE SAMPLE, SEPARATELY PACKAGED AND IDENTIFIED AS DIRECTED BY THE CITY AND SHALL BE STORED AND PROTECTED UNTIL REMOVED FROM THE. WORK AREA BY THE CITY. 7. INSTALLATION OF INSIDE. CASING SEAL AFTER THE FINAL DRILLING DEPTH HAS BEEN REACHED AN INSIDE WELL SEAL WILL BE PLACED TO A DEPTH JUST BELOW THE BOTTOM OF THE CASING PERFORATIONS. THE. SEAL WILL CONSIST OF ALTERNATING LAYERS OF PEA GRAVEL AND BENTONITF. WITH ONE FOOT OF BENTONITF. TO 9 FEET OF PEA GRAVEL FOR THE BOTTOM 100 FEET OF SEALED HOLE. THE REMAINING HOLE WILL BE BACKFILLED WITH PEA GRAVEL TO THE BOTTOM OF THE INTERVAL TO BE PERFORATED. 8. CASING PERFORATIONS • THE CASING WILL BE PERFORATED TO OPEN THE OBSERVATION WELL TO THE AOUIFIER IN WHICH WELL 9 IS TO BE SCREENED. PERFORATIONS WILL BE 60 W 665 TECHNICAL SPECS. DECEMBER 1S82 • INSTALLED USING A MILLS KNIFE OR OTHER METHOD APPROVED BY THE CITY. IT IS ANTICIPATED THAT A 30 FEET THICK INTERVAL WILL BE PERFORATED. S. WELL DEVELOPMENT DEVELOPMENT OF THE OBSERVATION WELL SHALL BE PERFORMED BY THE CONTRACTOR TO REMOVE SAND AND FINE MATERIAL FROM THE STRATUM PENETRATED BY THE WELL SCREEN AND TO STABILIZE THE REMAINING SAND AND FINE MATERIAL IN THE STRATUM SO THAT THE WELL WILL YIELD WATER WITH A LOW SETTLEABLE AND SUSPENDED SOLIDS CONTENT. THE CONTRACTOR SHALL NOTIFY THE CITY NOT LESS THAN TWO (2) WORKING DAYS IN ADVANCE, TO THE DATE AND TIME WHEN WELL . DEVELOPMENT OPERATIONS WILL BE STARTED. THE DATE AND TIME. SELECTED SHALL BE A REGULAR DAY SHIFT, MONDAY THROUGH FRIDAY, EXCLUDING HOLIDAYS. THE OBSERVATION WELL SHALL BE DEVELOPED BY SURGING WITH A SURGE BLOCK OPERATED BY THE DRILLING ACTION OF THE CABLE TOOL RIG. THE SURGING EQUIPMENT SHALL CONSIST OF A VENTED SURGE BLOCK ATTACHED TO A DRILL STEM OR STRING OF PIPE, THIS SYSTEM SHALL BE CAPABLE. OF OPERATING THE SURGE BLOCK AT A RATE OF TWENTY TO FIFTY, 24 TO 36 INCH STROKES PER MINUTE. THE EQUIPMENT AND METHOD SHALL BE • APPROVED BY THE CITY. SAMPLES OF MATERIAL BAILED FROM THE WELL SHALL BE COLLECTED BY THE CONTRACTOR FOR INSPECTION BY THE. CITY WHO WILL DETERMINE WHEN THE WELL DEVELOPMENT CAN BE TERMINATED. WATER REMOVED FROM THE WELL DURING DEVELOPMENT SMALL BE DISPOSED OF AS SPECIFIED. 10. PUMPING TEST THE PIMPING TEST FOR THE OBSERVATION WELL SHALL RE AS SPECIFIED FOR THE PRODUCTION WELL WITH THE FOLLOWING EXCEPTION: THE PURPOSE OF THE PUMP TEST SHALL HE TO DETERMINE THE. MAXIMUM POSSIBLE YIELD FOR THE WELL, THEREFORE, THE FLOWRATE FOR THE PUMP TEST IS NOT PRECISELY KNOWN, THE. CONTRACTOR SHALL ATTEMPT TO PUMP 1,000 GPM FOR THE 40 HOUR TEST, HOWEVER, AT THE ENCINERR'S OPTION, THE PUMP TEST NAY HE FOR A LESSER AMOUNT, SNORT TERM VARIABLE RATE. SHALT. RE <.:LECTED IN THE FIELD BUT SHALL NOT BE FOR MORE. THAN 1,000 GPM. STEP TEST SMALL RE SELECTED IN THE FIELD BUT WILL NOT BE FOR • MORE THAN 1,000 GPM. W 665 TECHNICAL SPECS, DECEMBER I982 11. SEALING OF CASING A CEMENT GROUT SEAL SHALL BE PLACED IN THE ANNULUS BETWEEN THE 8-INCH CASING AND 12-INCH CASING FOR A MINIMUM DEPTH OF 20 FEET BELOW THE GROUND SURFACE PRIOR TO OR ON COMPLETION OF THE WELL. THE CASING SHALL BE CENTERED WITHIN THE HOLE TO ASSURE A COMPLETE SEAL OF 1-1/2 INCHES MINIMUM THICKNESS. NO WORK SHALL BE DONE ON THE WELL FOR A MINIMUM PERIOD OF 72 HOURS FOLLOWING PLACING OF THE SEAL. THE CEMENT GROUT PLACEMENT METHOD SHALL BE IN ACCORDANCE WITH THE REQUIREMENTS OF WAG 173-16D-I30, SEALING OF UNCONSOLIDATED FORMATION WITHOUT SIGNIFICANT CLAY BEDS AND AWA AI-5, AND SHALL BE 'PROVED BY THE ENGINEER. 12. DISINFECTION • THE CONTRACTOR SHALL DISINFECT THE WELL IN ACCORDANCE WITH THE:REQUIREMENTS OF WAC 173-160-249, AND AWA Al-7, DISINFECTION. 13. 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