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737 BRIDGE GEOTHERMAL 100%CD
SHEET NUMBERSHEET DESCRIPTIONGEOTHERMAL GENERALGEOTHERMAL GSHX SITE LAYOUTGEOTHERMAL DETAILSGEOTHERMAL DIAGRAMS ANDSCHEDULESGEOTHERMAL TESTINGSYMBOLSCOMPOUND PRESSUREGAUGEPRESSURE RELIEFVALVEPRESSURE GAUGE0-100 PSIMOTORIZED BALLVALVEPRESSURE SUSTAININGVALVEISOLATION VALVECHECK VALVETEMPERATURE SENSORDIFFERENTIALPRESSURETRANSDUCERPRESSURESWITCH SET TO85 PSIBALANCING VALVEPETE'S TEST PORTCONCENTRIC REDUCERPUMPPUMP CONTROLLERWATER SENSOR3 WAY VALVEHATCHESCONCRETE / FACILITYFINISHED GRADEBEDROCKOVERBURDENFOAMTEMPERATURE GAUGEEXPANSION TANKSTRAINERPRESSURETRANSDUCERPTBUTTERFLY VALVECPPTSPSPDPWSFLOW METERBTU METERFMBTUG101G102G103SHEET INDEXG104G105 2022 © Austin Design Inc.architecture for enjoying lifeBrattleboro VT 05301802 451 5966Prospect Place737 Bridge Road (413) 582-70004 Allen Place, Northampton, MA 01060Landscape ArchitectureCivil EngineeringBerkshireGroupDesignLand SurveyingRutherford, NJ · New York, NY · Boston, MAPrinceton, NJ · Tampa, FL · Detroit, MIwww.stonefieldeng.comTITLE:SCALE:PROJECT ID:SHEET NUMBER:HAMPSHIRE COUNTYCITY OF NORTHAMPTON737 BRIDGE ROADPARCEL 18C-048-001MASSACHUSETTS120 Washington Street, Suite 201, Salem, MA 01970Phone 617.203.2076DATE:APRIL 22, 2024As Noted320 Riverside DrFlorence, MA 01062,G-101GEOTHERMAL GENERALDESIGN BASIS:1.HEATING/COOLING LOAD BASIS PER HESNOR EMAIL SUMMARY DATED3/19/24.-HEATING PEAK LOAD 739.86 MBH-COOLING BLOCK LOAD 993.19 MBH (82.8 TONS)2.DOMESTIC HOT WATER (DHW) PEAK LOAD PER HEZNOR SELECTION OF NYLEWATER HEATER DATED 12/21/2022-DHW PEAK LOAD 244 MBH3.ANNUAL ENERGY BASED ON DMI ANNUAL ENERGY ANALYSIS DATED 3/1/24,UPDATED RECEIVED 3/4/2024.MOST OCCUPIED-HEATING 506,386 KBTU-COOLING 670,311 KBTU-DHW 557,368 KBTULEAST OCCUPIED-HEATING 605,209 KBTU-COOLING 573,607 KBTU-DHW 278,365 KBTU4.DOMESTIC HOT WATER PRODUCTION VIA GEOTHERMAL SOURCED HEATPUMP, PER NYLE ANALYSIS DATED DEC 21, 2022-4,770 GALLONS PER DAY-90F TEMPERATURE RISE-244MBH HPWH RECOVERY5.SYSTEM OPTIMIZED FOR 270 GPM PEAK FLOW THROUGH THE PRIMARY LOOPTO MEET A NOMINAL 3GPM/TON OF PEAK LOAD BASIS.6.EARTH COUPLING LOOP SIZING IS AS SHOWN ON G-104. THE AVERAGEFORMATION PROPERTIES UTILIZED ARE BASED ON A THERMALCONDUCTIVITY TEST PERFORMED ON A TEST BORE INSTALLED AT THEPROJECT SITE, RESULTING IN RECOMMENDED THERMAL CONDUCTIVITY=1.43 BTU/HR-FT-F, AND THERMAL DIFFUSIVITY = 0.87 FT^2/DAY, AND MEANEARTH TEMPERATURE OF 53.2F. HIGH CONDUCTIVITY GROUT OF 1.4BTU/HR-FT-F MINIMUM IS REQUIRED.7.FROM THE ABOVE LOAD AND ENERGY BASIS, ALONG WITH DESIGN DETAILSHEREIN, THE ENTERING WATER TEMPERATURE FROM THE GEOTHERMALSYSTEM DESIGN LIMITS ARE 32F MINIMUM, 85F MAXIMUM.8.SEE SPECIFICATION 23 70 00 FOR DETAILS ON INSTALLATION AND STARTUPOF GEOTHERMAL BOREFIELD AND SYSTEM.GENERAL NOTES:1.FOURTY-FOUR (44) VERTICAL LOOPS AT SPECIFIED DEPTH AND PIPE SIZE.2.TRENCHING, SAND BEDDING, AND BACKFILL BY GEOTHERMAL AND GENERALCONTRACTORS. ALL OSHA, STATE AND LOCAL SAFETY REGULATIONS MUSTBE MET.3.GEOTHERMAL CONTRACTOR TO TEST, BACK FILL AND CHARGE LOOP WITH25% SOLUTION BY VOLUME OF PROPYLENE GLYCOL ANTIFREEZE PERSPECIFICATIONS.4.ALL NON-MANIFOLD PIPING SHALL BE SIZED TO NOT EXCEED 5.0 FPS ATPEAK FLOW.5.TOTAL DYNAMIC HEAD OF GEOTHERMAL CIRCULATOR PUMP TO BEFINALIZED AFTER BORES AND MANIFOLD HAVE BEEN FINALIZED TO PREVENTUNDER OR OVERSIZING.6.ALL HORIZONTAL UNDERGROUND PIPING TO BE HDPE PER SPECIFICATIONAND AT A MINIMUM 4' DEPTH FROM FINAL GRADE.7.ALL UNDERGROUND CONNECTIONS TO BE HEAT FUSED BY AN IGSHPACERTIFIED INSTALLER.8.ALL VERTICAL LOOPS MUST BE ±10% IN LENGTH OF ONE ANOTHER &BALANCED TO PROVIDE CONSISTENT FLOWS AND HEAT TRANSFER.9.THE CONTENT WITHIN THIS SHEET IS A SCHEMATIC VIEW FOR ILLUSTRATIVEPURPOSES ONLY. PIPING DETAILS NOT SHOWN.10.ALL BOREHOLE PARAMETERS SHOWN ARE TYPICAL & SUBJECT TO CHANGEAFTER BORES ARE DRILLED, DEPENDING ON GEOLOGY.11.INSTALLED U-BENDS IN BORES SHALL BE GROUTED PER SPECIFICATIONS12.ALL BOREHOLES SHALL BE IN PARALLEL CONFIGURATION WITH UNIFORMDEPTHS.13.PRIOR TO ADDING ANTIFREEZE, WATER IN GSHX MUST MEET THE MINIMUMWATER QUALITY STANDARDS OF THE ANTIFREEZE AND HEAT PUMPMANUFACTURERS. IN-PLACE CONDITIONING OF THE GSHX WATER MAY BENECESSARY.14.SYSTEM SHALL BE PRE-CHARGED TO 50PSI.15.INSULATE ANY WATER BEARING CONDUITS WITHIN 5FT OF GEOTHERMALHDPE PIPING PER 3.1 OF SPECIFICATION 48 16 00.16.GEOTHERMAL CONTRACTOR SHALL INSTALL HORIZONTAL HEADER PIPINGFROM BORES INTO BUILDING, AND INSTALL HDPE VALVING INSIDEMECHANICAL ROOM AS SHOWN. COORDINATE MAIN SUPPLY/RETURN PIPESINTERFACE TO IN-BUILDING PIPING WITH MECHANICAL CONTRACTOR. E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E EOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOH OHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGW W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W W WWWWWWWWALLISONSTREETWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE 206204202MH204MHMH203201203 MHMHXXXXXXXXXXXXXXXXXXXXXXXXX X X X X X X X X TE E E E E E E E E E E E E E E E E E E E E E E E SANSANSANSANSANEEEEEEEEEEEEEEEEEEEEEEEEEEGEEEEEEEEEEEEEEEEEEEEEEEEE E E E E E E E E E E E E E E E E EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEPBEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E EEEEEEEEEEEEEEEEEEEEEEPBE E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E EEEEEPBEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE E EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE E TEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEPBEEEEEEEEEEEEEEEEEEEPBEEEEEEEEEEEEEEEEEEEEEMHMHMHMHMHMHMHMH203201 203MHMHMHMHMHMHMHMHMHMH204MHMH202204206E E E E E E E E E E E E E EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E SANSANSANSANSANEEEEEEEEEEEEEEE 2022 © Austin Design Inc.architecture for enjoying lifeBrattleboro VT 05301802 451 5966Prospect Place737 Bridge Road (413) 582-70004 Allen Place, Northampton, MA 01060Landscape ArchitectureCivil EngineeringBerkshireGroupDesignLand SurveyingRutherford, NJ · New York, NY · Boston, MAPrinceton, NJ · Tampa, FL · Detroit, MIwww.stonefieldeng.comTITLE:SCALE:PROJECT ID:SHEET NUMBER:HAMPSHIRE COUNTYCITY OF NORTHAMPTON737 BRIDGE ROADPARCEL 18C-048-001MASSACHUSETTS120 Washington Street, Suite 201, Salem, MA 01970Phone 617.203.2076DATE:APRIL 22, 2024As Noted320 Riverside DrFlorence, MA 01062,G-102GEOTHERMAL GSHX SITELAYOUTSITE LAYOUT NOTES:1.THE GEOTHERMAL BORE FIELD CONSISTS OF FORTY FOUR (44) VERTICALCLOSED LOOP BORES.2.HORIZONTAL PIPING SHALL CONNECT THE BORES TO THE EQUIPMENT WITHINTHE BUILDING. EACH GHX MODULE SHALL BE PIPED WITH STEP-DOWNREVERSE RETURN TO BALANCE PRESSURE DROP ACROSS THE BORES. SEESHEETS G-103 AND G-104 FOR FURTHER DETAILS.3.ALL HDPE PIPING MUST BE BURIED A MINIMUM 4FT BELOW FINISHED GRADE,OTHERWISE INSULATION WILL NEED TO BE PLACED OVER SAND BEDDINGWITHIN TRENCH PER DETAILS ON G-102.4.GEOTHERMAL CONTRACTOR MUST MEET THE MOST STRINGENT OF NPDES,LOCAL AND STATE REQUIREMENTS RELATED TO DRILLING, WATERMANAGEMENT, AND TRENCH CONSTRUCTION.5.VERTICAL BORE LOCATIONS SHOWN.6.BORES ARE LABELED 'X-Y' WHERE X=GHX MODULE #, Y=BORE NUMBER IN GHXMODULE.7.GEOTHERMAL CONTRACTOR SHALL REMOVE DRILLING SPOILS FROM THE SITE.8.BORE LOCATIONS SHOWN ON SITE SHALL BE MARKED BY THE GENERALCONTRACTOR. INFORM GEOTHERMAL DESIGNER AND ARCHITECT OF ANYDISCREPANCIES AND/OR CONFLICTS.9.OTHER FEATURES ON DRAWING MAY NOT BE ACCURATE. THIS DRAWINGINTENT IS ONLY FOR IDENTIFYING BORES, AND LOCATING APPROXIMATE BORELOCATIONS AND UNDERGROUND PIPING. CONTRACTORS MUST CONTACT DIGSAFE AND HAVE UNDERGROUND UTILITIES IN THE AREA MARKED PRIOR TOANY EXCAVATION OR DRILLING. THE ENGINEER MAKES NO GUARANTEE THATTHE INFORMATION SHOWN HEREUPON IS ACCURATE OR COMPLETE. IT IS THERESPONSIBILITY OF ANY PARTY WORKING ON THE SITE TO VERIFY LOCATIONAND DEPTH OF UTILITIES PRIOR TO ANY EXCAVATION ACTIVITY.10.GEOTHERMAL CONTRACTOR SHALL INSTALL SPECIFIED HORIZONTAL PIPINGPER IGSHPA REQUIREMENTS AND SPECIFICATION, AND COORDINATE WITHGEOTHERMAL ENGINEER FOR INSPECTION OF FUSED JOINTS PRIOR TOBACKFILLING.11.GEOTHERMAL CONTRACTOR SHALL INSTALL 14 GAGE COPPER WIRE ALONGHORIZONTAL PIPING WITHIN TRENCHES. THE CONTRACTOR SHALL REMOVEANY ROCKS, THEN COVER GEOTHERMAL HORIZONTAL PIPING WITH MINIMUM6" BEDDING SAND PRIOR TO BACKFILLING AND COMPACTING TRENCHES.CONTRACTOR RESPONSIBLE FOR INSTALLING MARKING TAPE ~1FT BELOWFINAL GRADE.GHX MODULE 1 OF 411 VERTICAL CLOSED-LOOPBORES AT 20 FT NOMINALSPACING, TYPCOORDINATE WITH EXISTING DRAIN PIPING,GEOTHERMAL PIPING TO BE LOCATEDBELOW WITH 12 INCH MINIMUM SEPARATIONWITH RIGID INSULATION. SEE DETAIL 'E' ONSHEET G-103 FOR DETAILS.GEOTHERMAL VERTICALBOREHOLE LOCATION,44 PLACES AS SHOWNSUPPLY AND RETURNHEADER PIPINGCOORDINATE WITH NEW DRAIN PIPING,GEOTHERMAL PIPING TO BE LOCATEDBELOW WITH 12 INCH MINIMUM SEPARATIONWITH RIGID INSULATION. SEE DETAIL 'E' ONSHEET G-103 FOR DETAILS.4-64-54-44-34-24-14-74-84-94-104-113-13-23-33-43-53-63-73-83-93-103-112-12-22-32-42-52-62-72-82-92-102-111-11-21-31-41-51-61-71-81-91-101-11THERMAL CONDUCTIVITY TEST BORE,ALREADY INSTALLED 2022 © Austin Design Inc.architecture for enjoying lifeBrattleboro VT 05301802 451 5966Prospect Place737 Bridge Road (413) 582-70004 Allen Place, Northampton, MA 01060Landscape ArchitectureCivil EngineeringBerkshireGroupDesignLand SurveyingRutherford, NJ · New York, NY · Boston, MAPrinceton, NJ · Tampa, FL · Detroit, MIwww.stonefieldeng.comTITLE:SCALE:PROJECT ID:SHEET NUMBER:HAMPSHIRE COUNTYCITY OF NORTHAMPTON737 BRIDGE ROADPARCEL 18C-048-001MASSACHUSETTS120 Washington Street, Suite 201, Salem, MA 01970Phone 617.203.2076DATE:APRIL 22, 2024As Noted320 Riverside DrFlorence, MA 01062,G-103GEOTHERMAL DETAILS44 TOTAL BORESTYP. 11 PLACES FOREACH OF 4 GHX MODULESFINISHED GRADE4FT MINGROUTED PERSPECIFICATION,1.4 BTU/HR-FT-F114" HDPE TYPEACH UBEND INBOREHOLE410 FT BOREHOLE TYPBBSEE DETAIL B FORCROSS-SECTIONVIEWSTEEL CASING TOBEDROCK, LENGTHWILL VARY VERTICAL BORE DETAILAN.T.S.DETAILSCALEBEDROCKOVERBURDEN1"=1'BACKFILL WITH EXCAVATEDMATERIAL OR SELECT BACKFILL2" RIGID INSULATION WHEREINDICATED ON PLANSSAND BEDDING & BACKFILL14 GA COPPERDETECTION WIRENOTE: CONTRACTOR MUSTPROVIDE ALL TRENCHPROTECTION TO MEET ALLAPPLICABLE STATE AND OSHASAFETY STANDARDS.SEE CIVIL DRAWING FOR REQUIRED FINISHFINISH GRADE5' MIN6" MINMARKER TAPE, 1 FT BELOW GRADE6" MIN6" MIN6" MIN6" MINTRENCH FOR SINGLE SUPPLY/RETURN PIPE PAIRUP TO 4" DIAMETERBDETAILSCALEBACKFILL WITH EXCAVATEDMATERIAL OR SELECT BACKFILL14 GA COPPERDETECTION WIRESEE CIVIL DRAWING FOR REQUIRED FINISHFINISH GRADE4FT MIN6" MIN TYPMARKER TAPE, 1 FT BELOW GRADE6" NOMINALSEPARATION. TYP6" MIN TYPCOMMON TRENCH FOR MULTIPLE SUPPLY RETURNPIPE PAIRS UP TO 4" DIAMETERCDETAILSCALENOTE: CONTRACTOR MUSTPROVIDE ALL TRENCHPROTECTION TO MEET ALLAPPLICABLE STATE AND OSHASAFETY STANDARDS.N.T.S.14 GA COPPERDETECTION WIRE6" MIN, TYP2 IN RIGID INSULATION EXTENDINGBEYOND GEOTHERMAL PIPINGSAND FOR PIPE BEDDING & BACKFILL2" RIGID INSULATION EXTENDING1FT BEYOND UTILITY PIPINGNOTE: CONTRACTOR MUSTPROVIDE ALL TRENCHPROTECTION TO MEET ALLAPPLICABLE STATE AND OSHASAFETY STANDARDS.SEE CIVIL DRAWING FOR REQUIRED FINISHFINISH GRADE1' MINMARKER TAPE, 1 FT BELOW GRADESPACING AND INSULATION FOR GEOTHERMAL PIPECROSSING UNDER UTILITY PIPEDDETAILSCALEUTILITY PIPENOTE: SEE APPROPRIATE DETAILB & C FOR TRENCH SPECIFICS.N.T.S.GEOTHERMAL PIPE2" RIGID INSULATION EXTENDING1FT BEYOND UTILITY PIPING6"ELASTOMERIC SEAL ELEMENTLS MODEL 3005" CORE HOLE3" HDPE DR11 GEOTHERMAL PIPELINKSEAL SEALING SYSTEMFN.T.S.DETAILSCALELINK-SEAL AT ALL 8 GSHXMODULE PENETRATIONS,SEE DETAIL "F"18" MIN. TYP1 FT MIN.SPACING, TYP.LINK-SEAL SEALINGSYSTEM AT ALL 8 GSHXMODULE PENETRATIONS,SEE DETAIL "E"GEOTHERMAL CIRCUIT PIPING FOUNDATIONEDETAILSCALEN.T.S.6 INCH NOMINAL BOREHOLE G-104GEOTHERMAL DIAGRAMSAND SCHEDULES 2022 © Austin Design Inc.architecture for enjoying lifeBrattleboro VT 05301802 451 5966Prospect Place737 Bridge Road (413) 582-70004 Allen Place, Northampton, MA 01060Landscape ArchitectureCivil EngineeringBerkshireGroupDesignLand SurveyingRutherford, NJ · New York, NY · Boston, MAPrinceton, NJ · Tampa, FL · Detroit, MIwww.stonefieldeng.comTITLE:SCALE:PROJECT ID:SHEET NUMBER:HAMPSHIRE COUNTYCITY OF NORTHAMPTON737 BRIDGE ROADPARCEL 18C-048-001MASSACHUSETTS120 Washington Street, Suite 201, Salem, MA 01970Phone 617.203.2076DATE:APRIL 22, 2024As Noted320 Riverside DrFlorence, MA 01062,VERTICAL BORE LOOP FIELD- (44) TOTAL BOREHOLES - (4) GHX MODULES OF (11) BORESEACH- ONLY ONE GHX MODULE SHOWN ABOVE FOR CLARITY- SEE DETAILS FOR PIPE SIZES- SEE SHEET G-102 FOR LAYOUT ON SITEGEOTHERMAL EARTH COUPLING SYSTEM SCHEMATICNTSVERTICALBOREHOLE,(TYP. ALL)REFERENCE "TYPICAL REVERSE-RETURNGHX MODULE" CHART FOR PIPE SIZE FOREACH SEGMENT (TYP. ALL)a'GHX MODULE HEADERSb'c'd'cdSUPPLYRETURNe'f'U-BEND,REFERENCE CHART(TYP. ALL)ah'g'efghii'bj'jk'kREFERENCE "TYPICAL REVERSE-RETURNGHX MODULE" CHART FOR PIPE SIZE FOREACH SEGMENT (TYP. ALL)TYP. VERTICAL BORE REVERSE-RETURN GHX MODULE, 1 OF 4 SHOWNNTSBOREHOLE - 1BOREHOLE - 2BOREHOLE - 3GHX MOD 1GHX MODULE, 3 INCHHDPE SUPPLY ANDRETURN HEADERSBOREHOLE - 4BOREHOLE - 5BOREHOLE - 6BOREHOLE - 11 BUILDING FOUNDATION4" PURGE AND FLUSHPORT - CAPPED AND NC,TYP BOTH SIDESPT1TS-RMANUALGLYCOL MAKEUPBYPASS ON BLDG SIDE OFGEOTHERMAL PUMPSBY HVAC CONTRACTORSEE M-SERIESDRAWINGS FORFURTHER DETAILSBY GEOTHERMALCONTRACTORLINK SEAL OR EQUAL SEALINGSYSTEM WITH CORE DRILLED HOLEIN FOUNDATION, PROVIDED BYGEOTHERMAL CONTRACTOR (TYP.)TS TSFMP PPP PTTS-SBTU P PGHX MOD 2GHX MOD 3P PGHX MOD 4OPERATIONAL SEQUENCE (SEE M-SERIES DWGS FOR FURTHERREQUIREMENTS):1.PUMPING: GEOTHERMAL PUMPS TO PROVIDE NOMINAL 2.5 TO3GPM/TON OF HEAT PUMPS CALLED TO HEAT OR COOL2.HEAT PUMP CONTROL: HEAT PUMPS MUST HAVE CONTROLVALVE WHICH OPENS ONLY DURING CALL FOR HEATING ORCOOLING3.BAS SYSTEM MUST MONITOR THE FOLLOWING:TS-S: SUPPLY TEMPERATURE (ALARM BELOW 32F/ABOVE 85F)TS-R: RETURN TEMPERATUREPT1: BOREFIELD PRESSURE (ALARM IF BELOW 15PSI)THE ABOVE MONITORED DATA MUST BE LOGGED AND ACCESSIBLEFOR A MINIMUM OF 1 YEAR FOR TROUBLESHOOTING PURPOSES.MAIN SUPPLY ANDRETURN HEADERS,6 " HDPEBV -CALEFFI130900A6" BYPASS,(NORMALLYCLOSED)6" BYPASS,(NORMALLYCLOSED) 2022 © Austin Design Inc.architecture for enjoying lifeBrattleboro VT 05301802 451 5966Prospect Place737 Bridge Road (413) 582-70004 Allen Place, Northampton, MA 01060Landscape ArchitectureCivil EngineeringBerkshireGroupDesignLand SurveyingRutherford, NJ · New York, NY · Boston, MAPrinceton, NJ · Tampa, FL · Detroit, MIwww.stonefieldeng.comTITLE:SCALE:PROJECT ID:SHEET NUMBER:HAMPSHIRE COUNTYCITY OF NORTHAMPTON737 BRIDGE ROADPARCEL 18C-048-001MASSACHUSETTS120 Washington Street, Suite 201, Salem, MA 01970Phone 617.203.2076DATE:APRIL 22, 2024As Noted320 Riverside DrFlorence, MA 01062,G-105GEOTHERMAL TESTING FOUTININSTALLEDU-BEND PIPE INBOREHOLEPPFIGURE 1: U-BEND FLOW PRESSURE DROP AND HYDROSTATIC TEST SETUPFINSTALLEDU-BEND PIPE INBOREHOLE, TYP.HORIZONTALCIRCUIT PIPINGINPOUTPFIGURE 2: GHX MODULE FLOW PRESSURE DROP AND HYDROSTATIC TEST SETUPFIELD TESTING OF INDIVIDUAL VERTICAL U-BENDS AND INSTALLATION1.PRIOR TO INSTALLATION INTO A BOREHOLE, THE CONTRACTOR SHALL VISUALLYINSPECT EACH U-BEND FOR ANY SIGNIFICANT DAMAGE (SCRATCHES, GOUGES, ETC.)THAT EXCEEDS 10% OF THE PIPE WALL THICKNESS. U-BENDS SHALL ALSO BE TESTEDFOR LEAKS PRIOR TO INSERTION INTO THE BOREHOLE. ANY U-BEND LOOP ASSEMBLYTHAT HAS SIGNIFICANT DAMAGE OR LEAKS SHALL NOT BE REPAIRED AND SHALL NOTBE INSERTED INTO A BOREHOLE. LEAK TESTING SHALL BE DONE BY EITHER OF THEFOLLOWING, AND THE RESULTS SUBMITTED UTILIZING THE TEST LOG SHEETS AT THEEND OF SPECIFICATION SECTION 237000.1.1.WITNESS RELEASE OF PRESSURE IN LOOPS THAT ARE PRE-PRESSURIZED ANDSEALED BY THE MANUFACTURER. A LACK OF CLEARLY NOTICEABLE PRESSURERELEASE SHALL REQUIRE VERIFICATION VIA 1.2 BELOW.1.2.PERFORM HYDROSTATIC PRESSURE TEST AT ~60PSI AND OBSERVE NO LEAKSOVER A 30 MINUTE PERIOD..2.AFTER INSERTION OF EACH LEAK FREE AND SIGNIFICANT DAMAGE FREE U-BEND INTO ABOREHOLE, SEAL THE BOREHOLE WITH THE APPROVED GROUT PER THE DESIGNDOCUMENTS. GROUT SAMPLES SHALL BE COLLECTED, TESTED AND SUBMITTED ASFOLLOWS:2.1.EACH GROUT SAMPLE SHALL BE LABELED WITH THE BORE ID,DATE AND THEPROJECT NAME.2.2.ONLY 1 GROUT SAMPLE SHALL BE TAKEN FROM ANY INDIVIDUAL BATCH OF GROUTMIX.2.3.TWO GROUT SAMPLES SHALL BE TAKEN FROM THE FIRST BOREHOLE GROUTED.AFTER THE FIRST BOREHOLE, TAKE ONE GROUT SAMPLE FOR EVERY 4THBOREHOLE.2.4.THE GROUT SAMPLES SHALL BE TESTED BY AN INDEPENDENT TESTINGLABORATORY PER ASTM D5334, AND SUBMITTED FOR THE PROJECT RECORD.3.AFTER GROUTING THE U-BEND IN EACH BORE, PERFORM BOTH A FLOW PRESSUREDROP TEST AND HYDROSTATIC PRESSURE HOLD TEST PER THE FOLLOWING, ANDSUBMIT THE RESULTS UTILIZING THE TEST LOG SHEETS AT THE END OF SPECIFICATIONSECTION 237000.3.1.REFER TO FIGURE 1 BELOW FOR THE TEST SETUP.3.1.1.THE PT TEST PORTS MUST BE LOCATED TO AVOID ADDITIONAL PRESSUREDROP FROM THE SETUP. LOCATE PT PORTS WITHIN 2FT OF U-BEND PIPING,AND UTILIZE PIPE AND FITTINGS OF SAME OR LARGER DIAMETER THAN U-BENDPIPING.3.1.2.ONE INSERTION PRESSURE GAGE SHALL BE USED AT THE PT TEST PORTSDURING THE TESTING. THE GAGE SHALL HAVE GRADUATIONS DOWN TO 12 PSIINCREMENTS FOR ACCURATE READINGS.3.1.3.THE FLOW RATE SHALL BE MEASURED TO THE NEAREST HALF GALLON PERMINUTE (GPM).3.2.FLOW PRESSURE DROP TEST3.2.1.FLOW WATER THROUGH U-BEND AT A MINIMUM OF 2 FT/SECOND FOR AMINIMUM OF 15 MINUTES, UNTIL FULLY FLUSHED OF DEBRIS AND PURGED OFAIR. SEE THE MINIMUM PURGING FLOW RATE ON G-001 TABLE 'GHX SYSTEMDESIGN INFORMATION'. NOTE THAT HIGHER PURGE FLOW RATES WILL RESULTIN FASTER FLUSHING AND PURGING, BUT KEEP PRESSURES BELOW THE PIPEPRESSURE RATINGS.3.2.2.AFTER FULLY FLUSHED AND PURGED, SET THE FLOW RATE TO THE VALUES ONSHEET G-001 AS SHOWN IN TABLE 'TYPICAL REVERSE-RETURN GHX MODULE'FOR 'MINIMUM PURGING FLOW' OF THE U-BEND.3.2.3.MEASURE THE PRESSURE DROP (THE DIFFERENCE BETWEEN PRESSUREREADINGS AT THE 'IN' AND 'OUT' PT SAMPLING PORTS). USE THE SAMEINSERTION GAGE AT EACH PORT WHILE THE FLOW REMAINS CONSTANT.3.2.4.COMPARE THE MEASURED PRESSURE DROP TO THE ANTICIPATED PRESSUREDROP FOR THE U-BEND PER G-104. A VALUE MORE THAN 10% HIGHER THANTHE ANTICIPATED PRESSURE DROP INDICATES THAT THE U-BEND IS NOT FULLYFLUSHED OR PURGED, OR IS PARTIALLY COLLAPSED OR KINKED. IF FURTHERFLUSHING AND PURGING DOES NOT RESULT IN AN ACCEPTABLE PRESSUREDROP, THEN THE U-BEND MUST BE REPLACED BY THE CONTRACTOR AT NOADDITIONAL COST.3.3.HYDROSTATIC PRESSURE HOLD TEST3.3.1.UTILIZE ASTM F2164-18 FOR THE STANDARD PRACTICES FOR FIELD LEAKTESTING OF POLYETHYLENE PIPING USING HYDROSTATIC PRESSURE. THEFOLLOWING PROVIDES A SUMMARY OF THE TESTING PROCESS FORCONVENIENCE. REFER TO THE ASTM STANDARD FOR DETAILS, ESPECIALLYRELATED TO SAFETY.3.3.2.INITIAL EXPANSION PHASE: AFTER THE U-BEND IS FULLY PURGED OF AIR,PRESSURIZE THE U-BEND TO 100 PSI FOR 4 HOURS. RE-PRESSURIZE ASNEEDED TO 100 PSI DURING THIS PERIOD.3.3.3.TEST PHASE: REDUCE THE PRESSURE TO 90 PSI AND MONITOR FOR 1 HOURWITHOUT INCREASING PRESSURE OR ADDING MAKE-UP WATER.3.3.4.PASS/FAIL: THE U-BEND PASSES THE TEST IF FOR 1 HOUR THERE IS NO VISUALLEAKAGE AND THE PRESSURE REMAINS WITHIN 5% OF 90 PSI.3.3.5.A U-BEND THAT DOES NOT PASS THE TEST MUST BE REPLACED BY THECONTRACTOR AT NO ADDITIONAL COST.FIELD TESTING OF COMPLETED GHX MODULE OR HEADER PIPING PRIOR TO BEDDING ANDBACKFILL1.THE HDPE PIPING FUSED JOINTS MUST BE VISUALLY INSPECTED BY THE GEOTHERMALDESIGNER OR OTHER QUALIFIED AND APPROVED INSPECTOR. ANY VISUALLYUNACCEPTABLE FUSED JOINTS, OR SIGNIFICANT DAMAGE THAT EXCEEDS 10% OF THEPIPE WALL THICKNESS, MUST BE REPLACED BY THE CONTRACTOR AT NO ADDITIONALCOST.2.AFTER ALL THE PIPING AND FUSED JOINTS ARE VISUALLY ACCEPTABLE TO THEINSPECTOR, PERFORM BOTH A FLOW PRESSURE DROP TEST AND HYDROSTATICPRESSURE HOLD TEST PER THE FOLLOWING, AND SUBMIT THE RESULTS UTILIZING THETEST LOG SHEETS AT THE END OF SPECIFICATION SECTION 237000.2.1.REFER TO FIGURE 2 BELOW FOR THE TEST SETUP.2.1.1.THE PT TEST PORTS MUST BE LOCATED TO AVOID ADDITIONAL PRESSUREDROP FROM THE SETUP. LOCATE PT PORTS WITHIN 2FT OF GHX MODULEHEADER PIPING, AND UTILIZE PIPE AND FITTINGS OF SAME OR LARGERDIAMETER THAN HEADER PIPING.2.1.2.ONE INSERTION PRESSURE GAGE SHALL BE USED AT THE PT TEST PORTSDURING THE TESTING. THE GAGE SHALL HAVE GRADUATIONS DOWN TO 12 PSIINCREMENTS FOR ACCURATE READINGS.2.1.3.THE FLOW RATE SHALL BE MEASURED TO THE NEAREST HALF GALLON PERMINUTE (GPM).2.2.FLOW PRESSURE DROP TEST2.2.1.FLOW WATER THROUGH EACH GHX MODULE OR HEADERS AT A MINIMUM OF 2FT/SECOND THROUGH EVERY SECTION OF PIPE FOR A MINIMUM OF 15MINUTES, UNTIL FULLY FLUSHED OF DEBRIS AND PURGED OF AIR. SEE THEMINIMUM PURGING FLOW RATE ON G-001 TABLE 'GHX SYSTEM DESIGNINFORMATION'. NOTE THAT HIGHER PURGE FLOW RATES WILL RESULT INFASTER FLUSHING AND PURGING, BUT KEEP PRESSURES BELOW THE PIPEPRESSURE RATINGS.2.2.2.AFTER FULLY FLUSHED AND PURGED, SET THE FLOW RATE TO THE VALUES ONSHEET G-104 AS SHOWN IN TABLE 'GHX SYSTEM DESIGN INFORMATION' FOR'PURGING PRESSURE DROP' OF THE GHX MODULE.2.2.3.MEASURE THE PRESSURE DROP (THE DIFFERENCE BETWEEN PRESSUREREADINGS AT THE 'IN' AND 'OUT' PT SAMPLING PORTS). USE THE SAMEINSERTION GAGE AT EACH PORT WHILE THE FLOW REMAINS CONSTANT.2.2.4.COMPARE THE MEASURED PRESSURE DROP TO THE ANTICIPATED PRESSUREDROP FOR THE GHX MODULE OR HEADERS PER G-001. A VALUE MORE THAN10% HIGHER THAN THE ANTICIPATED PRESSURE DROP INDICATES THAT THEPIPING IS NOT FULLY FLUSHED OR PURGED, OR SOME OTHER ISSUE. THECONTRACTOR MUST FIND AND FIX THE ISSUE UNTIL IT PASSES RETESTING ATNO ADDITIONAL COST.2.3.HYDROSTATIC PRESSURE HOLD TEST2.3.1.FOR EACH GHX MODULE OR HEADER, UTILIZE ASTM F2164-18 FOR THESTANDARD PRACTICES FOR FIELD LEAK TESTING OF POLYETHYLENE PIPINGUSING HYDROSTATIC PRESSURE. THE FOLLOWING PROVIDES A SUMMARY OFTHE TESTING PROCESS FOR CONVENIENCE. REFER TO THE ASTM STANDARDFOR DETAILS, ESPECIALLY RELATED TO SAFETY.2.3.2.INITIAL EXPANSION PHASE: AFTER THE PIPING IS FULLY PURGED OF AIR,PRESSURIZE TO 100 PSI FOR 4 HOURS. RE-PRESSURIZE AS NEEDED TO 100 PSIDURING THIS PERIOD.2.3.3.TEST PHASE: REDUCE THE PRESSURE TO 90 PSI AND MONITOR FOR 1 HOURWITHOUT INCREASING PRESSURE OR ADDING MAKE-UP WATER.2.3.4.PASS/FAIL: THE PIPING PASSES THE TEST IF FOR 1 HOUR THERE IS NO VISUALLEAKAGE AND THE PRESSURE REMAINS WITHIN 5% OF 90 PSI.2.3.5.PIPING THAT DOES NOT PASS THE TEST MUST BE REPAIRED AND RETESTEDUNTIL IT PASSES BY THE CONTRACTOR AT NO ADDITIONAL COST.2.4.THE PIPING IS READY TO BE BEDDED AND BACKFILLED PER DRAWING ANDSPECIFICATION REQUIREMENTS AFTER SATISFACTORILY PASSING ALL TESTS.