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HomeMy WebLinkAbout2015-10-27 - 1 Buckland Road - Septic Letter of TransmittalP.O. BOX 1167 21JEFFREY DRIVE ��� SOUTH WINDSOR, CT 06074 fesPHONE: 860.291.8755 FAX: 860.291.875 7 www.designprofessionalsinc.com CIVIL & TRAFFIC ENGINEERS / PLANNERS / SURVEYORS / GIS ANALYSTS / LANDSCAPE ARCHITECTS Serving Connecticut, Massachusetts, * Rhode Island LETTER OF TRANSMITTAL To: Heather Oatis Environmental Health Specialist Town of South Windsor WE ARE SENDING YOU: ® Attached ❑ Shop Drawings ® Prints ❑ Copy of Letter ❑ Change Omer Date: 10/27/2015 DPI Project No. 1831 Re: One Buckland Center 1 & 25 Buckland Road ❑ Under separate cover via ❑ Renderings ❑ Specifications the following items: COPIES„DATE 1 10/26/2015 NO. DESCRIPTION Central Sewage System Application Form 3 10/27/2015 Septic Plan Septic Plan Checklist 1 10/27/2015 1 10/27/2015 $625 Check to State of Connecticut Treasury 3 10/27/2015 Narrative Statement and Supporting Materials These are transmitted as checked below: ® For Approval ❑ No exceptions taken ❑ For your use ❑ Make corrections ❑ As requested ❑ Revise and Submit ® For review and comment ❑ For bids due REMARKS: 2 sets to go to state for their review 5cprsc PLAv IU ML RATT v i 1 ❑ Resubmit copies for approval ❑ Submit copies for distribution ❑ Return corrected prints ❑ Prints returned after ban to us SIGNED: Daniel H. Jameson�E.l. CC: State of Connecticut, Department of Public Health Central Sewage System Exception Application To: Environmental Engineering Program Department of Public Health 410 Capitol Ave., MS# 51 SEW P.O. Box 340308 Hartford, CT 06134-0308 Attn Property Owner Name: Property Address:_ _ Building 1 Description: Building 2 Description: Date: Local Health Department: Mailing Address: Phone Number: Email Address: Town: (example: single-family residential building, office building, restaurant, etc.) (example: garage/workshop with 1/2 bath, 1-bedroom guest room, pool house cabana, office building, etc.) Building floor plans reviewed to confirm the layout is consistent with basis of design? YES / NO Water supply and sewer connections shown on plan for buildings served? YES / NO Public Health Code Section 19-13-13100a (B100a) compliance demonstrated (if applicable)? YES / NO Connection to New, Repair or Existing subsurface sewage disposal system (SSDS)? If the connection is to an Existing SSDS, fill in the following: Approximate age of SSDS: As -built on file? YES / NO Septic tank size (gallons): Date of the most recent septic tank pump -out: Two compartment septic tank? YES / NO Septic tank material type:_ Leaching system description: Any problems or deficiencies noted with the septic tank or leaching system? YES / NO Comments: Documentation Submitted: Soil Test Data B 100a compliance plan/sketch, if applicable Central system plan with design information showing buildings, wells, property lines, SSDS, etc. Plan prepared by: Professional Engineer Licensed Installer Other: Plan reviewed by: Signature: (Print Name and Title) rev. 7/12 L... r,..,L ..--.....� .o , S T 7 r! S7d1 F Ei � G TV '1 `39� SEwEY� cJ c.K�4�"� M "of" vi j- SrGv- c4'l- 31 CC3 (_G-4R AILO CA4-= uAZ C I— C-Gu- 647 - ;1 4q') G 3 Svu Mu0r� -�1 iu r FROM raviCbx,v� I�TSC.'1'r 7 A ys � ,� r gw "TzM r 1 P rve V p /U h% �-LnrE o.. STABS L") /.3�3 cis A-Z4- ---a 0 1 G PO (Th(3L E y /�✓Tc�i.vG qZc� Cd�E Aoi Ci.+A-Tr 2 rh�7il 2 Np=�q i pR ��dc�5 ark �, ur+d G prj y P porn-, C S5EF_ -p t2 Sa I�• (3vTc A N tv, y-7z S-r- x O. ( � ►, 1�s —� I0K7. 2 Gf'D \ 1`7SS, 3 GPI = ►J 1— o< o,, -7 I G p 7 v1 (CJ o D S tPT3[ T A -Au f: 2000 G�tLo•�, l P 4-c d7 g.S 3 G A. (,, y 6rw, F-r �.v � �- sp i,.. f} � �,ay s y aromas Gp r�z G7er- r- 2q < ICJ , 1 lip 9.)y'F / GA�LN rCA �IJ FELT R h1�11�5 ,► Ec�A : 7.2 s 2 SF� Fr,V c s rr x P� - z0 Iw,`l I c/. 2S s�o9E = IY•3� MoT►GC = 3h'° OP 300 - 1/6rr Pr : 4- 3U'jGfDjA/6 Nar'h, --1 0. 2Y Afp i;a GRhss a 0.`7 8 2 Ac-aEs 3 f - RuTe-cwFA�G So jrc( --) O. 17 Ackf; c vti,L r,,, C,.m2q 34a o.o14" V 33-b o,ots- 1 [ U 3 A G• r6 C v,Yy L- 2,3j 7,_ `= 323 v• 13 i c o. '72 7, - 9 rv�w -- _ APPgtI)91ifiATE .EXISTING G _ ✓ . - LOCATION r TIC TANK, tt _-.-._...�� ` . REMOVE.:. � MANUFACTURE ... �� _.._: - - - _y_.. � SEE M . INSTRUCTIONS ON T381 GSF o�) vt ... .. _ Vt uu auw iu nFSI(3N nFPTH _ 1 _- ,n�_a" avr �-ao L" CLEANOUTS — l\ oonpncFn (;ROUND -- DE5/6N PERCOLATION KA / r BOTTOM ELEV.=150.46 LdELL O :� PROPERTY LINE: l29 , ,> 50 l lNG `SERVED• Il U LD 2000 GALLON SEPTIC TANK 24'-4'X8'X4' STANDARD CHAMBERS INV.=154.43—IN SINGLE ROW (3 UNITS) STORi"1W�1 TER PIPING. 47' > 25' . STORI'MhIA TER'' STRUCi'URES: 52' > 25' i. INV.=154.18—OUT BOTTOM ELEV.=150.74 ,nn4,,;,e�-F,R /nlFll_TRATOR5: .53'..> 50 MYSIMG SOUTH EAST CORNILK MVmumr-m 1 w�...�.., —_.— TF: 157.01: DISTANCE TO SEPTIC TANK IM4ERt(IN): 229.97 `FT P 'iI a LI � x �o U 10. Leoretd 8 I4kietNi ° ...... Te . ©: _ Q erer La:aGa�_ 1834 ! Buckletnd 80 5arihfAiindsor. L1it;8dli11C_ ,see Dade .. 4 414 g .. l �e ...: p..... ....... And1f kCrAc.:.... pp�st Time .:...: ;1,11 #0 ..... .. slhet ........................... _ N �4ft.:`......... rn Gilt...... - :........:.......... _:............................r-.................:........ ,............ a nn .. 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LL 4.47....:..::....:...:...:..:_...:.. . {1:.:.........:....:........... 4.53..._.............................. ......::.:...; ,::;;..;...:;...:..::..:.:. .. .................. 1:TQ :.:......::.... ....... ....... ..:.....: ... :....... ......................:............. .... . ...4 8 ....... .... ..... 1.72.......:......:.....:......:.:.............:..::..,..:;..;..:.......,,......:....::....... ,.........:...... :.:.,.....:....... `v � M T.F.=159.Ot T.F.=159.0± ..: MANHOLE ExrEN>ED TO GRADE OLlrIFD I FLL PIER TAW U(CUDS Ir) .. ANHOLES P M ' Flu INV.=154.18 o T 6" PVC SDR-35 OUTLET BAFFLE e N € N j INLET BAFFLE I` Gj CONNECTION AT MID DEPTH I 3/4" r— I� EVIDENCE OF HIGH GROUNDWATER CONDITIONS EXIST DURING EXCAVATION SEPTIC TANK, CONTRACTOR [ALL NOTIFY ENGINEER PRIOR TO INSTALLATION. ADDITIONAL BALLAST MAY. :NECESSARY I COUNTERACT BUOYANCY FORCES. 2 000 GALLON SEPTIC TANK N.T.S. 1 * " WALLS 1'-3� >'0 N o N aro � � u cc �X0Inn z O a In in �. mU�1 o �F Q.ceNN m NW O a 066 x N pmco Nth iJ z Tn MC cc I SINGLE PHASE ELECTRICAL SERVICE s 3 "R w a - J CONNECTION o 3 z w IL TO SMITH ROAD. COORDINATE o 1 -3 6 STORM DRAIN MAN HOLE I WITH EVERSOURCE.T.F.=i 57.5 o,00001 RETAIN! G WALL UNDERDRAIN (LOADING REQUIREMENTS TBD. o o f INV.=148.7 (IN) `"I'' SYSTEM SHOWN FOR ILLUSTRATIVE CONNECTION SUBJECT TO CHANGE) ° yto INV.=135.0 (OUT) PURPOSES ONLY. FINAL DESIGN N .iw m Lai ® TO BE �ETERMINED BY OTHERS. p� ,O� CB-3 F.L. =150.3 I N/F a C 113 w N NO G� TYPE C - 4FT SUMP I EVERGREEN NAL K L L C o w} "�R� W/ TRAP HOOD I _ _ _ ° �� J T.F.=156.8 TRANSFORMER STORSTCP90o C/D LAURENCE P. RUBINOW ESQ. 'y LL z CONNECT TO EXISTING i p = -J GQ ( F.L.=149.6 CONCRETE PAD , �� CATCHBASIN [N SMITH STREET (-VOL. I169 PG. 004� {� (LOCATION SUBJECT TO CHANGE INV.149.6 +� INV.=132.0-12"(S) m oc a INFILTRATOR SYSTEM LOCATION INV.=131.0-6"(S) 83 - MC-3500 STORMTECH COORDINATE WITH EVERSOURCE) 50' 12" -HDPE ' -3�`1 INV.=131.5-6"{E} ° BOTTOM OF CHAMBERS: 149.5 S=0.06 .SN 13gL7 = u Z 45' - 8" HDPE J16 S=0.027 ca CB-2 - - - - - - - - - - - - - - - - 131 8„ PIN ' `�� X J 1 x J DOUBLE PE 'C' LARGE BU5N i fU ' ` , `� \I • ' ' r Q W I Y TYPE II 132 133 i b r ` W r� i , ` � p r+ 1r i I i 'I 4FT SUMP - 135 , , r I x W/ TRAP HOOD 134 , �7 `� �� r/ POS D 2O j r 1 1 J ?1 §$ 10§2 2 T.F.=155.4 133 I g pp a 137• ! y �` ' ,�, ' f�/ ' l�{I TA R Y SEWS,p 1 f ' ^� a C ' _ F.L.=149.6 135 _ ` " 136 139 t \I �f/ I 1 I' �' I 1 IV !\3 „} $� 7' - 12" HDPE - JJB _ 141 �' @ �.y ,` / / 1 ' ' I - ; J U°g b CB-4 5=0.01 137 �40 143 34 = Z Z 'fi, J I�% + 2615 S 'FT ' + ' ^, p $ TYPE 'C' - 4FT SUMP 139 142 W/ TRAP HOOD ' 14l r44 147 I Ul �. ` W rr J g L $ h T.F.=157.0 r J =� ` �► r , , 1 � F.L.=149.6 143 r4s - 1s� , �13 0' PO �D` j r , , `� , � � � $ 4 147 P ; U)THICK CONCRETE + + , , ` < 3 b s SPLASH SLAB UNDER 149 _ 7S i57 r r 151 2 159 `�6' `�� C Ti2 / , j '� l �z ao I STORMTECH UNIT 140 1s4 ++ �� N F.L. =150.0 14 144 - 1 j58 '` ,•: -'.- : ` �i• '- 146 Q :i :,i• :` ':J:r :r - t •' ! f!� O r°p W W r�8- �'�'j:, ::t. ;:. 'PER• PAVEMfiVT '�' '' '. ' 'l w d' r P15 � -x ILL 1 - .i..:. .i,.., '•:' ',•' y' sr f I 1, IV ;V �• > _ 74' - 4" HDPE v J UNDERDRAIN \ i 1 /�I 0 �,� sa.oa' . � I � j / l rlr4. 4t :r .-,'' � y F.L.=158.5 _ _. __ - -- - , I +` , Od ID 0 - 22' 8" HDPE , ' p +:' 9. x _ ::.}'' •;' f �� , - c� S=0.40 1; + t �^ :PER11l0 PAVEMEN '.:' _ _ - - " ' c,,,a $ T, 29' 8 HDPE m 4" THICK CONCRETE 19' -- 12 HDPE F.L:=149.5 ! f S=0.032 ', // o i b i STORMTECH UNIT # 8 SPLASH SLAB UNDER - _ a - - - - - - + :�``: r.'1:.? „. .• : ,;� + - - ' TYPE 'C' - 4FT SUMP - - - - - - - - - - — — I _ - - - - - _ i T D ,t y +— — c v Y W/ TR P HOOD - ��- - - - - - _ TEl //-o/�H / r _ - - - - - - - ,'� rn -�42- 1 CONSTiPUCTI � � uj O ' 72'-4'X8'X4' STANDARD CHAMBERS EASE/ IENT++ SINGLE ROW 9 UNITS 1 ( } � w � 64.00 {MAINT IN HYDRAUL � _ -SAN==A5 7 A-NH OLE BOTYQM_ELEY=150:8-6 TFT1 54' - 12" HDPE ----- --- — - 0� �a I / + W UNDERDRAIN - - - - - - - - C QO ` `F.L. =158.4 il' /` ' - _ J ,� `+ ` �� O O 18' -- 8" HDPE _ - _ _ PROPOSED RETAIL , - - _ J e ` ? .•: ' S=O. 7 �� '_QUO GALLON S PTIC TANK rr I - I r try W © U BUILDING n U1 � ' + O � z �, 1 ;,• V.=1 .18�OUT / '% 10,472 GSF - _ _ I' + J O _ - - F.F.=161.2 - 154.00 �' _ _ 6 - - - + \+Y/ U cn IRR POSED- RET-AI - -:y �^ - - XWXW- TANDARD-CHAMBERs !\ '` _ Y / / ' ' ' �/ m z '; SINGLE BOTTOM CN = 7,381 GSF �' - - W O \O F.F.=161., IRON RISER no CASln 5' ' . W/ FRAME_AND 24"0 COVER 73 Z--A GLEAN UT / +n r I - - i _ - / - - - - - - - o '"` EVERGREEN NALK LLC a 6"-7' SCH-40 c% LAURENCE P. RUBINON1 ESQ. - - INV= S " - S S=O.Oi c� �f X 6 -129' SCH 40 SANITARY MANHOLE (VOL. 116 9 PG. 004� m o tv rn lS� : =0 021 INV=154.6 (N&S9�0 14a .-154.5(E& - - - - - - - - - - - - — — _ — 157.0 (EAST IN RT TO�ErPEdGGED} C II 4 6"-78' SCH-40 �, x A -iOZ 141 S=0.031 P Gl I ::. m s. — — — — — — — ' '' ` / SANITARY MANHOLE— — -- 15� 0 I I \ T.F=45s.8— c j,", Ave., I I Z \ Cn �n GS LU > )S) / — r3 — — — — o tst r r a I —_ l5" RCP —r 39. o —------ 0 1. AIL ls� I S \ l i (� c �_r_•�--" ` �p ti WATER SERVICE CONNECTION Cu ~ J� GAS SERVICE CONNECTION UNDERGROUND TEL PHONE TO SMITH STREET, COORDINATE UTILITY NOTES:_ S U1 _ TO BUCKLAND ROAD. COOR f� WITH CT WATER _ r � � LINE SIZE TO BE DETERMINED} AD WITH EVERSOURCE. --0- { 1. "CAUL BEFORE YOU DIG" - CONTRACTOR SHALL NOTIFY UTILITY KLAND (GAS MAIN LOCATION TBD) k COMPANIES OF PENDING EXCAVATION AT OR NEAR PUBLIC UTILITIES. BUC CONTRACTOR SHALL CALL (800) 922-4455 AT LEAST 72 HOURS PRIOR k n TO BEGINNING EXCAVATION. Z c � �- � n � � l5" RCP 1� N it �f 2. PROPOSED WATER, FIRE, NATURAL GAS, ELECTRIC, AND �" Q n 15 RCP COMMUNICATION SERVICE DEPICTED ON THIS PLAN ARE SHOWN FOR J J ILLUSTRATIVE PURPOSES ONLY. FINAL SIZE AND LOCATIONS OF UTILITIES a o — SHALL BE DETERMINED BY OTHERS. m --- yC — A J.l!-1[ /,rid r!'•-i.i ._.J1 r'{i"'Yr i! {� 3. OWNER SHALL BE RESPONSIBLE FOR ANNUAL INSPECTION OF ALL SUBSURFACE STORM SEWERS FOR EVIDENCE OF SEDIMENT DEPOSITION. o i CULVERTS SHALL BE CLEANED AS NECESSARY, TO PROVIDE FOR a ; r APPLICANT: PROPERTY OWNER: EFFICIENT WATER CONVEYANCE, AND TO ENSURE FOR THE SAFE r ,Scott Leonard Scott Leonard DISCHARGE OF STORMWATER FROM THE SITE. SHEET ii0 Lavender Lane li0 Lavender Lane 4• IN THE EVENT THAT SHALLOW GROUNDWATER CONDITIONS ARE ENCOUNTERED DURING TRENCH EXCAVATION FOR THE SANITARY SEWER, Rocky Hill, CT 06067 Rocky Hill, CT 06067 CLAY STOP SHALL BE INSTALLED AND THE ENGINEER SHALL BE NOTIFIED. UTIIII=1 e r Town of South Windsor - Health Department 1540 Sullivan Avenue, South Windsor, CT 06074 Phone: 860-644-2511 ext. 248 Fax: 860-644-7280 CHECK LIST REVIEW OF PLAN OF SEWAGE DISPOSAL SYSTEM Owner: Scott Leonard Location: 1. 9. & 15 Buckland Road, & 395 Smith Street Date Received: Plan prepared by: Design Professionals, Inc. Title: Leonard Property (Retail Use) Address Installer Investigated by License # Date Benchmark Location: See Map Elevation: See Map Design Percolation Rate: 4.48 Mins/inch at hole(s) TP-5 If residential, number of bedrooms If non-residential, estimated daily flow 1785.3 GPD HOUSE SEWER (INVERT LEVELS) Depth at foundation wall 157.3 Depth at septic tank 154.43 (in) & 154.18 (out) SEPTIC TANK Cleanout located: 233.3' ft. from Benchmark 1 (see map) and 207.9' ft. from Benchmark 2 (see map) Manufacturer: United Concrete (Subiect to Change) Size: 2000 gals. Depth to Cleanout: 4.3' Reviewed/inspected by _ Title _ PLAN/INSTALLATION APPROVED DATE LEACHING SYSTEM Description 1 Row of 112' with D-Box in center of 2-56' lengths (4'x4'x8' concrete galleries) & 1 Row of 24' with D-Box connection (4'x4'x8' concrete galleries) Effective area 1251.2_ sq. ft. Required effective area 1190.2 sq. ft. Spacing between units 6 ft. 100% reserve area provided Yes Bottom of leaching system 18 inches above maximum water table Yes: 12' Bottom of leaching system 4 feet above ledge rock Yes: No ledge witnessed Bottom of leaching system 102.4'8" inches below final grade 159.0+ Pumping required No Curtain drain required No Serial distribution Level system If served by well, future backwash disposal location for potential water treatment SEPARATING DISTANCES Well located ft. from and ft. from Distance sewage system to well on property To well on adjacent property To house served ft. To nearest watercourse ft. ft. To water surface ft. To property line _ To dwelling adjacent property To nearest ground or surface water drain NOTES Reviewed/inspected by Title PLAN/INSTALLATION APPROVED DATE P.O. BOX 1167 21 JEFFREY DRIVE SOUTH WINDSOR, CT 06074 PHONE: 860.291 .8755 FAX: 860.291 .8757 www.designprofessionalsinc.com CIVIL & TRAFFIC ENGINEERS / PLANNERS / SURVEYORS / GIS ANALYSTS / LANDSCAPE ARCHITECTS Serving Connecticut, Massachusetts, C Rhode /s/and Narrative Statement Central Septic Systein Appiicaiio Scott Leonard One Buckland Center RECErVED 1 Buckland Road South Windsor, Connecticut OCT October 27, 2015 2 7 ?0 1 5 INTRODUCTION SOUTH WINDSOR HEALTH DEPT Scott Leonard is proposing to develop a 2.058 acre parcel of land located on the west side of Buckland Road and to the south of Smith Street in South Windsor, Connecticut. The proposed development will include the construction of two retail buildings (I0,500sq.ft. and 7,400sq.ft) with associated paved parking, subsurface utilities, and landscaping. A shared septic system is proposed to service both buildings. Refer to the accompanying Septic Plan for information on the layout and details of this system. DESIGN The proposed system was designed per The Connecticut Public Health Code's, "On -site Sewage Disposal Regulations, and Technical Standards for Subsurface Sewage Disposal Systems". The DPH regulation's requires 0.1 GPD/sq.ft. for the sizing of septic tanks for retail buildings. With 17,900+ sq.ft. proposed, our estimated design flow was determined to be about 1800+ GPD. To accommodate this 24 hour flow, a central 2000 gallon septic tank is proposed. Percolation test results demonstrated a pert -rate of less than 10.1 mins/in for our proposed leaching area. Consequently, an application rate of 1.5 GPD/sq.ft ELA (per Table 8) demonstrated a required effective leaching area of 1190.2 square feet. To provide the effective leaching area, 17 - 4' x 8' x 4' H-20 rated concrete leaching galleys are proposed providing 1252 sq.ft. of effective leaching area. The chambers will be arranged in one row with two sections of 64'and 72' to provide 136ft of leaching area. The Minimum Leaching System Spread (MLSS) calculation yielded a minimum spread requirement of 96ft. The 136ft provided will more that adequately suffice for this requirement. 50 FT SETBACK FROM SEPTIC SYSTEM TO STORM INFILTRATOR SYSTEM The U.S. Geological Survey Organization published a report in November of 2010 where the effect of groundwater mounding due to the installation of infiltration structures was assessed.' The USGS developed a spreadsheet utilizing the Hantush's equation to assess site specific groundwater mounding effects. Design Professional's used this spreadsheet to assess the effects of mounding to Carleton, G.B., 2010, Simulation of groundwater mounding beneath hypothetical stormwater infiltration basins: U.S. Geological Survey Scientific Investigations Report 2010-5102, 64 p. G:\jobs\1831 \Dots\Applications\CT - SENTRAL SEPTIC APP\1831 - Septic System Narrative.docx the groundwater table beneath our proposed leaching area due to the infiltrators proposed for the site. Results have been submitted along with this narrative. Conservative values were used for soil property characteristics. The specific yield of soil was taken from the "Specific Yield -Compilation of Yields for Various Materials" published by the USGS.z Horizontal hydraulic conductivity and the recharge rate of the soil were averaged based on values published on the USDA website. The duration of stormwater infiltration was calcuiated assuming a maximum standing water height of 2.05ft which is the outlet invert elevation of the infiltrators. The initial thickness of the saturated zone was taken from test pit data. The results demonstrated that at 50ft from our proposed infiltrator location, the effects of groundwater mounding will raise the groundwater table 9.45$. Test pit results demonstrated that the high ground water table at the proposed septic leaching area is 3ft below the bottom of existing grade. At 9.45ft of groundwater mounding, the proposed leaching chambers bottom elevation will be 3.2ft above the mounded groundwater table. RESPONSE TO COMMENTS Our office has reviewed the comments by Sean Merrigan dated September 18, 2015. Responses are provided below: 1. All Design flow data, proposed building usage, test pit data, directional arrows will be provided. All submitted sets will be stamped. 2. MLSS provided. 3. Watertight specification added to cleanout and sanitary manholes 4. H-20 Rated access risers provided, watertight specification added. 5. One flat leaching row is now proposed. 6. Schedule 40 PVC (per Table 2) is proposed for all sanitary piping. 7. No foundations drains proposed 8. Ok 9. Included all items listed on checklist. 2 Johnson, A.I. "Specific Yield: Compilation of Specific Yields for Various Materials." Water Sup ly Paper 1662 (1967): D1. U.S. Geological Survey. U.S. Government Printing Office. Web. 26 Q . 2015. C:\jobs\ 1831 \Docs\Applications\CT - SENTRAL SEPTIC APP\1831 - Septic System Narrative.docx