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HomeMy WebLinkAboutMADDUX PARK LT 4M �� 4 Municipality of Anchorage Page I of DEPARTMENT OF HEALTH AND HUMAN SERVICES ENVIRONMENTAL SERVICES DIVISION P.O. Box 196650 * Anchorage,, Alaska 99519-6650 0 Telephone: 343-4744 On -Site Wastewater Disposal System and/or Well Inspection Report Permit Number: SW 9if 0 2 PIDNumber: Name: V1,0ceof P. Wastewater System: 13 New 3 Upgrade Address: *2 4!(ISO, _7-V0!:X Ar)cA 99s-16-1 ABSORPTION FIELD Phone: 7AIS"- 00 7S_ No. of Bedrooms: 51 Deep Trench ❑O.Shallow Trench 0 Bed 0 Mound ❑0 Other LEGAL DESCRIPTION Soil Rating: 016 Total Depth from original grade: GPD/Sq. Ft. 11.0 Lot: Block: Subdivision: - I/ Depth to pipe bottom from original grade: ly. Gravel depth beneath pipe — Nav(all:Ay. Peurk 0 Ft. 7.0 Ft. Township: I Range: i Section: Fill added above original grade: Gravel length: I — Z Ft. 51 Ft. WELL: C-;AjSf 0 New 0 Upgrade Gravel width: Z'S Numberoflines: Dilancebelween lines: Ft. Ft. Classification (Private, A,B,C): Total Depth: Cased To: Total absorption area: Pipe material: re-61 0 reef Ft. Ft. 71 if SO. Ft. D-303Y No*-Perf Driller: Date Drilled: Static Water Level: Installer: C9 IN Date installed: 7/31 /?� Ft. 1 Yield: Pump Set at: I Casing Height Above Ground: TANK GPM Ft. Ft. SEPARATION DISTANCES (ji Septic 0 Holding 0 S.T.E.P. To From Septic Tank Absorption Field Lift Station Holding Tank Public/Private Sewer Lines Manufacturer: A n ch o r cr!,e 7',111 It Capacity in gallons: 1000 Well )to to,/ — > Z15" Material: V keel Number of Compartments: 2 Surface Water >1&0 > too — LIFT STATION Lot 25* Size in gallons: Manufacturer: 1 Line 0 Foundation "Pump on" level at: Pump off" level at: High water alarm at: Curtain Pump Make & Model Electrical Inspections performed by: Drain Remarks: r BENCH MARK �,e cet ".t e 0.-4!5�tooll 14.,7 k Y-W kr,,( e), Location and Description: Corper oic 6(eck V Gc4l1 Run" d,verke va1L-,e gel ,v k7e_t4o# ltyy,05-4, WO#cler qrC4e0( 71ZAY19e' Assumed Elevation: / �-ef 14, ENGINEER'S SEAL of 40;"!% 0 et 't ?C,/, Ch )(0 IN,A 7-eCA Inspections performed by: Dates: ist_74?5� IP Poo Ofood 2nd 7IZ9 19e- Department of H aZltnd Hu ervices approval *T,HE0D0j,j,E F. A,-,00RE CE 3589 Reviewed and approved by. Date: �?/Z_ 4 - * J 2-G is (Rev. 91w 1) kq0A ez) PERMIT NO: SW960212 SWING TIES: FROM: COR. "A" COR. "B" COR. "C" TO: S.T. C.Q. "D" 9.5' 20.3' S.T. C.O. "E" 12.5' 25.8' DBL. G.O. "F" 16.4' 28.5' VALVE "G" 17.7' 28.5' TR. C.O. "H" 23' 45' 60' TR. M.T. "1" 37.5' 47' 39' TR. C.O. "J" 52' 47' 12' C.O. "K" 43' 36.5' 19, M.T. "L" 25' 15, \ PAGE 2OF2 \ e ♦ ♦ ♦♦ H. R 100' T.T. #24 NEW 1000 GAL. SEPTIC TANK ..H — ------ I I DECK "p, I I ,.A" "G.. }� "Do'_ r, p tb " ,r „ „ „ NEW 51' LONG SOIL ABS. TRENCH- r 1 7 b` Ef ECTIVE GRAVEL DEPTH R PLAN VIEW V SLE: 1" 20' - 0" p' GROUND SURFACE v "BULL I EXISTING RUN" I VALVE1 3 BDRM w HOUSE "L" TBM B" --- ----------------- rT.H. #1 ORIGINAL SOIL ABS. TRENCH r NEW 1000 GALLON I \_INV. 94 3'-1 SEPTIC TANK 94.5' LOT 4, MADDUX PARK S/D SEPTIC SYSTEM UPGRADE AS -BUILT INSPECTION REPORT FLATTOP TECHNICAL SERVICES SCALE: AS NOTED 14530 ECHO STREET DRAWN BY TFM ANCHORAGE, ALASKA 99516 AUGUST, 1996 PAGE 1 OF 1 MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH AND HUMAN SERVICES P.O. BOX 196650, 825 "L" STREET, ROOM 502 ANCHORAGE, ALASKA 99519-6650 ON -SITE WASTEWATER DISPOSAL SYSTEM (UPGRADE) PERMIT PERMIT NUMBER:SW960212 DESIGN ENGINEER:FLATTOP TECHNICAL SERVICES OWNER NAME:GREGORICH VINCENT P JR & OWNER ADDRESS:2660 IVORY DR ANCHORAGE, ALASKA 99516 PARCEL ID:01825104 LEGAL DESCRIPTION: MADDUX PARK LT 4 LOT SIZE: 13200 (SQ. FT.) NUMBER OF BEDROOMS: 3 THIS PERMIT: 3 THIS PERMIT IS FOR THE CONSTRUCTION OF: DISPOSAL FIELD SYSTEM ALL CONSTRUCTION MUST BE IN ACCORDANCE WITH: DATE ISSUED: 7/19/96 EXPIRATION DATE: 7/19/97 1. THE ATTACHED APPROVED DESIGN. 2. ALL REQUIREMENTS SPECIFIED IN ANCHORAGE MUNICIPAL CODE CHAPTERS 15.55 AND 15.65 AND THE STATE OF ALASKA WASTEWATER DISPOSAL REGULATIONS (18AAC72) AND DRINKING WATER REGULATIONS (18AAC80). 3. THE ENGINEER MUST NOTIFY DHHS AT LEAST 2 HOURS PRIOR TO EACH INSPECTION. PROVIDE NOTIFICATION BY CALLING 343-4744 ( 24 HOURS ) (NOT REQUIRED FOR WELL ONLY PERMIT) 4. FROM OCTOBER 15 TO APRIL 15 A SUBSURFACE SOIL ABSORPTION SYSTEM UNDER CONSTRUCTION DURING FREEZING WEATHER MUST BE EITHER: A. OPENED AND CLOSED ON THE SAME DAY B. COVERED, SEALED AND HEATED TO PREVENT FREEZING 5. THE FOLLOWING SPECIAL PROVISIONS. SPECIAL PROVISIONS: RECEIVED BY: Ezele_ <� DATE: % / Z z- / 9 ISSUED BY: U M'` DATE: - /�� -�IVItmicipality of Anchorage Department of Health and Human Services 825 "L" Street Rick Mystrom, Mayor P.O. Box 196650 Anchorage, Alaska 99519-6650 July 24, 1996 Ted Moore, P.E. Flattop Technical Services 14530 Echo Street Anchorage, Alaska 99516 Subject: Waiver Request for Lot 4 Maddux Park Subdivision Waiver Request # WR960033, PID 9018-251-04, Permit #SW960212 Dear Mr. Moore: Your request for a waiver of the required 10 foot separation between a on -site wastewater disposal system and a lot line has been approved. The waived distance is the new trench to the west property line of 0 feet. This approval applies to the existing on -site wastewater disposal system lot line separation only. Any future upgrade to the on -site wastewater disposal system will require all separations be met or another from this department. If there are any questions or concerns regarding this waiver, please call our office at 343- 4744. Sincerely, AQ// Daniel J. Roth Civil Engineer On -site Services MA/ DJR./ijm:Gregorich MUNICIPALITY OF ANCHORAGE Department of Health and Human Services On -site Services Section Waiver Review Worksheet WR# WR960033 PID# 018-251-04 HA# Permit # Date Received: July 8, 1996 Legal Description: Lot 4 Maddux Park Engineer: Ted Moore, P.E., Flattop Technical Services 14530 Echo Street, Anchorage, Alaska 99516 Applicant: Vincent Greqorich Waiver Requested: Lot line waiver of new trench to west property line of 0 feet. Criteria: 1. Geology: Points: A. Water Table B. Soil Sorption C. Permeability D. Water Table Gradient E. Horizontal Separation TOTAL: 2. Special Conditions: 3. Other: Waiver is Granted: x Waiver is NOT Granted: List Conditions or Reasons for above: Date: % - 2 ¢- 96 By : 0/�,y - Name of Reviewer Rec #: #02042/0586 Amount: $ 115.00 Date Paid: 7-8-96 Dear Sirs: RECEIVED The purpose of this letter is to provide the required design narrative in support of our application for a permit to upgrade the wastewater disposal facilities on Lot 4, Maddux Park S/D, located at 2660 Ivory Drive. The present system is operating in a surcharged condition. In order to make this u possible, we are also requesting issuance of a lot line waiver allowing the new trench to be constructed de within 0 feet of the west lot line. Soils logs, perc test results, a site plan, design drawings and specifications are enclosed for your review. The only available site to construct the proposed trench is just west of test holes #1 and #2. As can be seen from the soil logs, the native material between 3 feet and 17.75 feet below ground level is a silty sand with a measured perc rate of 8 minutes per inch. In test hole #2 some cleaner gravelly sand was encountered down to 10 feet which will help provide better absorption in a portion of the trench, however the extent of this sand stratum is unknown. Using the soil application rate of 0.8 nc the wastewater ordinance for soils with a perc rate between 6 and 15 minutes per inch, his 3 bedroom in residence would require a total absorption area of (3 x 150)/0.8 = 563 square feet. The proposed 50 foot long trench design with 7 feet of sewer gravel has a total absorption area of 700 square feet, which should offset any adverse effects attributable to its proximity to the original system. The proposed upgrade will also incorporate a diversion valve allowing future reconnection to the original trench as desired, after the original system has had a chance to dry out. The topography of the lot in the vicinity of the proposed system slopes down towards the south southwest at 3 - 15%. The proposed design concept is to construct the trench around the northwest perimeter of the existing system, staying as far away from it as topographyand lot lines allow. Even with the requested lot line waiver, the maximum separation between trnches that can reasonably be achieved is approximately 5 feet. As can be seen from the layout depicted on the site lan line waiver will have little or no effect on the ability to construct replacement systems onthe Lotrequest 33 which soon the other side of the lot line. Except as discussed above, the proposed project should have no significant impact on present or future water supply and wastewater disposal systems serving adjacent properties, nor will it have any significant impact on reserved space -surface and subsurface, or on drainage. Please give me a call at 345-1355 if you have any questions on this submittal. Sincerely, lcoc 1177� Ted Moore, P.E. CONSTRUCT NEW50'LD~° SOIL ABS. TRENCH VK7.0-QVL BELOW HORIZ.O/8T.PIPE 10'UTILITY EASEMENT -----'----------- LOT1'ANBER HEIGHTS S/D (D WELL ' 'LOT 5 ' ' ' ' ' IVORY DRIVE 8��� �� ' _~.' ' ' ' ' ' ' ' INSTALL DBLC.{l � &^8ULL N^ .DIVERSIONVALVE 'DECK I ' L} .' ' ' ' BLM LOT7S -------'~ ) LOT 4, MADDUX �v�^�N�����P�---`~~ ___ SEPTIC SYSTEM SITE PLAN FLATTOP TECHNICAL SERVICES 1I--------' l4530ICJ�}STREET mcn=4OFEET /L^�0KA9g5l6 DRAVVN8YTF� NOTE THIS /8NOT ASURVEYED PLAT ALL LOCATIONS 8HOVVNARE APPROXIMATE. ' ' C. 1 r 3 "I I,, rl: "All -A M.T. O#Av# CONNECT TO ORIGINAL TRENCH INSTALL "BULL RUN" DIV. VALVE INSTALL DBL. C.O. PLAN VIEW SCALE: V = I ot - oil M.T. 0 MOUND BACKFILL MATERIAL 12" ORIGINAL GROUND FILTER FABRIC F-810 PERF PIPE 1/2" - 2 1/2" SEWER GRAVEL BOTTOM OF TRENCH SECTION "A - A" SCALE: V = 5, - 0,, CONSTRUCT NEW 50' LONG SOIL ABSORPTION TRENCH W. 7.0'GVL. BELOW DIST PIPE 0 EXISTING -1000 GALLON SEPTIC TANK 0 LOT 4, MADDUX PARK S/D­ SEPTIC SySTEM UPGRADE PLAN AND CROSS-SECTION FLATTOP TECHNICAL SERVICESCALE: C E�By. A SHOWN OWN 14530 ECHO STREET DRAW AS ANCHORAGE, AK, 99516 .IDLY,1996 F(attop Technicaf Services 14530 Echo Street, -anchorage, AK99516 Phone (907) 345-1355 Lot 4, Maddux Park S/D 2660 Ivory Drive Wastewater disposal system installation Specifications 1.0 General: 1.1 The scope of the project consists of inspecting the condition of the existing septic tank and construction of a new 50 foot long soil absorption trench containing a total of 7.5 feet Of sewer gravel. 1.2 Construction shall be as depicted on the approved site plan and design drawings. Minor deviations from these drawings may be allowed or required by the engineer conducting the inspections. All construction procedures and material specifications shall conform with Municipal and State requirements. All separation distances shall be in conformance with Municipal requirements, unless specifically waived. 1.3 The contractor shall be responsible to obtain any necessary utility locates, and to workaround y buried utilities. ar an 1.4 The contractor shall Provide adequate cover material and rough grading over all system components to ensure that proper drainage is achieved after settlement and that there are no residual depressions. Insofar as Possible the contractor shall minimize damage to trees and existing lawn areas. 1.5 Unless specifically agreed otherwise, the homeowner shall be responsible for finish grading after the soil is compacted, as well as placement Of topsoil and reseeding all areas disturbed by the construction. 1.6 The homeowner shall be responsible for any necessary coordination of the work, includin probable driving equipment over the lot line, with the owner of Lot 3 g 2.0 Septic Tank: 2.1 The existing septic tank may be retained in service, only if it's structural integrity has been verified by the inspecting engineer, and if it has functional cleanout pipes with airtight caps, allowing pumping access to each compartment. Any existing septic tank which is not retained in service must be properly abandoned by thoroughly Pumping, removing the top and backfilling with soil. 2.2 If required, a new 1000 gallon 2 compartment septic tank shall be set level on undisturbed soil. Each compartment shall be equipped with a watertight manhole cover and a 4" cleanout. If the tank is buried less than 4 feet, it shall be insulated with 2 inches of approved burial type, rigid insulation. 2.3 All pipe connections to the tank shall be equipped with waterproof mechanical couplings. waste line from the residence to the septic tank shall have a minimum slope of 1/4 ... per foot, li - The line between the tank and the soil absorption system shall have a minimum and the waste cleanout shall be installed within 5 feet of the building foundation, m1mum slope Of 1/8" per foot. A within 5 feet downstream of the Septic tank. and a double cleanout shall be installed 2.4 A "Bull Run" diversion valve shall be installed downstream of the double cleanout allowing future reconnection to the original trench, as desired. 3.0 Soil absorption system: 3.1 The soil absorption system shall be constructed by excavating a 50 foot long trench in the location shown to a depth of 7.25 feet below the level of the invert of the discharge pipe from the septic tank. 3.2 The bottom of the excavation shall be level. Any compacted or smeared surfaces shall be raked to allow Proper infiltration. 3.3 A total of 7.5 feet of approved sewer gravel shall be placed in the bottom of the excavation with the Perforated distribution pipes laid level such that the pipe inverts are no less than 7.0 feet above the bottom of the sewer gravel. Sewer gravel shall be 0.5" - 2.5" screened gravel, with less than 3% passing the #200 sieve. 3.4 Monitor tubes and cleanout pipes shall be of 4" diameter and installed in the locations shown on the design drawings. The portion of the monitor tube extending through the sewer gravel shall be perforated. 3.5 Approved filter fabric shall be placed over the entire top surface of the sewer gravel. A minimum of 2 feet of soil cover is to be placed over the filter fabric. If the soil cover thickness is less than 3 feet; two inches of rigid, burial type insulation is to be placed over the entire top surface of the gravel, in addition to the filter fabric. 3.6 The top surface of the cover material shall be raised a minimum of 12 inches higher than the surrounding terrain to allow for subsequent settlement, and shall be graded to slopes shall be no steeper than 3:1. smooth contours. Fill 3.7 Unless specifically agreed otherwise the homeowner shall be responsible for arranging to have the site finish graded after the backfill material has stabilized, and for Placement of adequate topsoil and seed to Promote rapid revegetation of all areas disturbed by the construction. 4.0 inspections: 4.1 A minimum of 4 engineering inspections will be required during the course of the project: () 1 initial stakeout with the contractor to establish the location of the system and to discuss the plans, specifications and construction procedures, (2) after the native material has been excavated to expose the infiltrative surface to ensure that it is level and at the right elevation, and conforms with the soil test information, (3) after the sewer gravel is in place and the distribution pipes have been and connected up to the septic tank, but prior to placement of insulation or filter fabric, and (4) after rough backfill and tri be laid piping connected, but prior to backfill. This inspection may be incorporated with any of the ab an th grading is complete. The new septic tank, if needed, requires one inspection after it is set level d e inspections. ove 4.2 The installer shall coordinate the timing of the inspections with the engineer sufficiently far in advance to ensure the availability of the engineer. FLATTOP TECHNICAL SERVICES 14530 ECHO ST. ANCHORAGE, ALASKA 99516 TEST HOLE # 1 SOILS LOG -- PERCOLATION TEST LEGAL DESCRIPTION: Lot 4, Maddux Park Subdivision DATE PERFORMED: June 21, 1996 PERFORMED FOR: Vince Gregorich r)PPTW Pt. SLOPE GM Fill material APt. (Original ground)SM Reddish sandy loam 11) COMMENTS ................... 15% SM Gray silty sand Dry, scattered cobbles and boulders Sidewalls do not smear 3% Dense, hard digging .... SM siltier and wet between 12'& 13.5' Sandier and dry below SM damp near bottom B.H. at Test Depth to Groundwater I Date w I :­ *` ..... :- ... 3% ...................... '"rl %-ULIA I 1UN HATE 8 (minutesAnch) PERC HOLE DIAMETER 6 TEST RUN BETWEEN — 5.25 FT AND 5.75 FT — )ximately 3.5'above septic_qqoutlet invert. Construct i,-h Al ----------- PERFORMED BY FLATTOP TECHNICAL SERVICES, ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINE CERTIFY THAT THIS TEST WAS PERFORMED IN IN EFFECT ON THIS DATE. DATE: 6 15% 7 SP/SM Slightly silty gravelly sand Loose, dry. Sidewalls slough B Many cobbles in upper portion Will Pere faster than T.H. #1 ..... 10 11 12- 13- 14- 15- 16- 17- 18- SM Silty sand Dense, hard digging Similar to T.H. #1 WN Depth to Groundwater I Date u, 1--* .... :' - - .: ' * ' � ' .3% CL .......... Date Reading Time Net Time Percometer Net Dra {minutes) I Reading {inches 1. -1 PERCOLATION RATE - (minutes/inch) PERC HOLE DIAMETER COMMENTS: TEST RUN BETWEEN - FTAND - FT This test hole was dug to check continuity of soils encountered in T.H. #1. Soils between 4' and 0' will perc faster, however the the ground surface at the test hole is approximately 7 feet higher than the septic tank outlet invert. Therefore, design should be based on T.H. #1 perc. PERFORMED BY FLATTOP TECHNICAL SERVICES. I r _ CERTIFY THAT THIS TEST WAS PERFORMED IN ACCORDANCE WITH ALLSTATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: -7 . ...................... . ................................. MUNICIPALITY OF ANCHORAGE DEPARTMENT OF HEALTH & ENVIRONMENTAL PROTECTION ENVIRONMENTAL ENGINEERING DIVISION 825 L Street - Anchorage, Alaska 99501 Telephone 264-4720 NAME ON -SITE SEWAGE DISPOSAL SYSTEM As` WOR WELL INSPECT -ION REPORT PHONE O_�N—EMAILI GADDRESS — NEW ADE `ka LEGAL DESCRIPTION LOCATICO Well NO. OF BEDROOM-s— DIS DISTANCE TO: Absorption area Dwelling Manufacturer PERMIT NO, Material Liq, capacit in gallons 'S 7elj No. of compartments' IF HOMEMADE: Inside length Width Well , Liquid —de,h---� DISTANCE TO: Dwelling 0 z ling— X-1 Manufacturer PERMIT NO. vVell Liquid capacity in gallons Found7tion U1j W 2m: DIS'ANCET Nearest lot z No. of 11- _j Length of PERMIT NO, 2 Uj each line _40-_ zx Cc �_, 1-1 n�th of lines Tota Top ��Ft — _�,rush 7rench vvi Tie ti3 grade If 6-- Distance between Lines ,,{ ,ill aterial beneatFi-tiTe- Lengt 6 -1--inches w Lengtj Width Total effective absorpt,-on-are—a — Depth inches t: Type of crib Crib diameter PERMITNO. Uj CL ter LU Crib� depili�— DISTANCE TO: ___T Total effective absorption area 'Class De Building —foundation J; �eares�jot line Driller Distance to lot line PERMIT NO. DISTANCE TO: Building foundation Sewer ­njj_e___ Se ptic tan )ZSOTMtion area(s) OTHER MATERIALS - TEST V(,? - -e_ RATING S i-L TE 0 SOI L TEST RATI N G REMARKS El rk, APPROVED DATE LEGAL 7-1TI 0 3 � 3/78) 825 'L' STREET, ANCHORAGE, AK. 991 264-4720 PERMIT NO ��� ��E����� ������ ( 300566 ) ��'� » ' - /l APPLICANT STEPHEN H, SCHIZECK ' SRH BOX 4029 Q -�� LOCATION 144TH AND LAKE OTIS ` ' - ��49- LEGAL L4 MHDDUX PARK LOT SIZE 13500 SQUARE FEET TYPE OF SOIL ABSORPTION SYSTEM IS: TRENCH MAXIMUM NUMBER OF BEDROOMS = ] SOIL RATING (SQ FT/BR)= 175 THE REQUIRED SIZE OF THE SOIL ABSORPTION SYSTEM IS : / �������-��== �� _��== � L'/ ' C, Fy Fy v��K_' THE LENGTH DIMENSION IS THE LENGTH (IN FEET) OF THE TRENCH OR DRHINFIELD THE DEPTH OF H TRENCH OR PIT IS THE DISTANCE BETWEEN THE SURFACE OF THE GROUND AND THE BOTTOM OF THE EXCAVATION (IN FEET) THERE IS NO SET WIDTH FOR TRENCHES THE GRAVEL DEPTH IS THE MINIMUM DEPTH OF GRAVEL l BETWEEN THE OUTFHLL PIPE AND THE BOTTOM OF THE EXCAVATION (�N FEET). -1-FApAstm7D P� PERMIT APPLICANT HAS THE RESPONSIBILITY TO INFORM THIS DEPARTMENT DURING THE ImSoA_Lri|1UN INSPECTIONS OF ANY WELLS ADJACENT TO THIS PROPERTY AND THE nunBEK OF RESIDENCES THAT THE WELL WILL SERVE. �NL ---LL���� 3m~KF/MEn/ ImGW��VFLANY �����F������ SYSTEM � ���� ����� ������ � U���� -- -- ,E../n, BE SUBJECT WITHOUT FINHL INSPECTION AND ~ HPPROYHL BY THIS TO PROSECUTION. �INIMUMDISTRNCE BETWEEN H WELL AND ANY ON -SITE SEWAGE DISPOSAL SYSTEM IS Lmm FEEFOR H PRIVATE WELL OR 150 TO 200 FEET FROM H PUBLIC WELL DEPENDING Jruw THE TTYPE OF PUBLIC WELL 1INIMUMDISTHNCE FROM H PRIY.TE WELL TO H PRIVATE SEWER LINE IS 25 FEET AND /u Al COMMUNITY SEWER LINE IS 75 FEET 4ELL LOGS ARE REQUIRED AND MUST BE RETURNED TO THE DEPARTMENT WITHI14 30 DAYS /F THE WELL COMPLETION. )THERREQUIREMENTS MAY APPLY, SPECIFICATIONS AND CONSTRUCTION DIHGRHM5 ARE ,vAILHBLE TO INSURE PROPER INSTALLATION. 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