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Home My WebLink About19961007 CONSULTANT REVIEW Town of North Andover SORT1j 1��0f ti `�t`eO �e, OG OFFICE OF e 0 C®Ii MUNITY DEVELOPMENT AND SERVICES p 146 Main Street 4TF0 nPP y.�S North Andover, Massachusetts 01845 �SSACHUS? (508) 688-9533 September 3, 1996 Mr. Philip Christiansen Christainsen& Sergi 160 Summer Street Haverhill, MA 01830 Re: 1750 Great Pond Road Dear Mr. Christiansen, I have reviewed the latest plans submitted for 1750 Great Pond Road. The following items as required by Section 4.1.36 of the North Andover Zoning Bylaw must be added: • the-annual mean high water mark of the lake • the edge of all wetland resource areas • the non-disturbance zone • the non-discharge zone • the edge of vegetation clearing (limit of work). Written certification by a Registered Professional Engineer stating that there will not be any significant degradation of the quality or quantity of the water in or entering Lake Cochichewick must also be submitted. I will submit this plan to the Watershed Council for review on Wednesday and expect comments from John Chessia at Coler& Colantonio by the end of this week. BOARD OF APPEALS 688-9541 BUILDING 688-9545 CONSERVATION 688-9530 HEALTH 688-9540 PLANNING 688-9535 Julie Parrino D.Robert Nicetta Michael Howard Sandra Starr Kathleen Bradley Colwell r COLER& COL/9\ITONIO ENGf�F?f� tli Cr, W IT, r' L Cn ,} ��++TT��rr��,, r rI FACSIMME CONTR SHEET To: Kathleen.Colwell Company: Too m of North_ xidover Phone: (508) 688-9535 Fax: (508)688-9541- From: Jahn Chessia Company: Coler&Colantlinio, Inc. Phone: (617)9£,?-5+!i3 Fax: (617)9C2-5=190 Date: September 6, 1996 Pages including this cover page: 4 i Comments: ):ec,iaw of 1-750 Gr .ai Pond Road copy to cllns iamsen S,-rgi L U, ISI D N COLER COL .ill TONIO L E�a�l'.EE�B,AMC•SC Ei 1TLl'a 11 111 1`I IJ'I 111 SeJternb r b, 99f J PAS.1K athleen Cohvell � Tiwa Plamier rn 120 Main Street. _`dor6 Andu er. [1IA 0t,3A5 RE: Review 1750 Great Pond Road Site P_an Subtrittal Dear Ml . Colwell: At your request,Cc4er&G.)lantaraa;Inc.has rvie-,ed t5e platy acd calculaduns fclr the abovz re eren-:�,i projea h addttiom we lla-ve-'-isited the site to re-view Casting conditions. 7t is our understanding tl-.t we ate to review the drainage calculations and puns ara that cmlliance v-A h the general rNuixetmnrs of the distiiel wctutd he perfcrrmc by in-house staff.. The follmv-iag docuut ;rare ret6ewed: • A plan entided"Site Development Plan for 11513 Crew Pond Road in North ml:io ter,M.a;s."prepared for Nlichael RuUo,prep•3red by Christiansen Sere dared,Nugust�27, 1996. • A caner tttter md support catetflajons,prepared by Christiansen&:Sergi Iasi. r4n-isedJul�)v]b, 1996. W. offer the iclllouring Cumments: 1. The parcel is locared o:i+:rreat Pond Road. No locus map was p_ovided to assi-3l,in identift,ing the site locatien. Repor-edty soils --T-sire ue of the"Paxiod'soil series. A!ioi7s neap for the site was not p_ovicled. Paxton soils are lisxced as having a laver O fragipaa at depths of A to 32 inches Mow grade. Fragipans ten . -d t,o be a stla 1- y permeable restricti;e •ar?r. It is prapared to corlstn:_ct a cL-ive�aY s�ro�xtate)S '101} feet long to access tae to?of the l-t for t-K ktise sit--. rl iTl CIO in a ,1 n� 101 record Park Drive,.c�,ite Ore stonenvall,uti-li,-- , poles.,a catch basin etc.along o the o� to _g tLe fmutag f t I -.. These features sh•-,-wd. d be indicated cu the fats. It is urclez:x if ru--Limirit2z�'k-atls or some ot-"Ier Moans of 51L)pe stubiH Lion is ix osel The dri-ve.-way appears to include a paved sect ors 3P k-D 12 feet vvi& -,vitf-sboulders kiw fbetxide on each side. The tr--Htm�-tit()F-ffie shoulders is uo,identified. Rims and inverts of d--ai=ua2e Structures have not been lcea--ified- It is not clear how the leazhing trenches-would be cionstructod in sloped areas since invert data h&>aat be-m pro-vided. 17 1 iT 3. No property line inform ion has befupwivided on the plan. Topography is hmited io the lot Asc-If It is unclear-w-fierex—the hillside C-ic tot lies�d If uphill areas .,4E iMPZCt the function Of-ffie PrOPOSOd drainage Sy,-tent. 4. The 5rontazQ along Great lILTrtd Road has linuted sight distance_ 5. The plans indicate construction c-&a part iag space and a.retaining-%.,Yau or some other form of slope stcbiliyjtioa in the rig-'A of%vay. We recommend that these fearure-3 be located within the bit. 6. The catch bwin detail does not include any information on the depth of tEe proposed sump,the dept of Outlet hood below flow bite and ty-Deof outlet hood,or the type of ggrat°proposed 7. Information on soil testing performed La 1992 was provi&d- The plan does not indicate where testing)vas I;er-fGnred• It is our unlerstaudin.-from To�cm staff that tc�-:ingwas performed at the top of the tot and Phut soils 3xe.likely to be less suitable toward the lower part of the site. In glacial till tTes of soil, permimbiiity i-'an be hight, y ariaNe- As we i-mve discussed in previous correspondence, published information ive have reviewed iltra regarding C g ir& km systems recommew that Mite to fur feet separation the bottom of the facility and maximum grcundwater elevations be provided. In addition, we recorrumad that testmg should be performed at the location of each proposed facdlity, Telling should he performed by a certified soil evaluator and witnessed by an agent of the wvm. 3. The infiltration rate used for analysis is 0.00069 fteVsec. Using th°recurded percolation rate of 11 min.,`in_ %nYild result in an iAfl rration Tate of 0."13 feet/sec. We recommend usiia.(,a factor of safely in the infiltration rate.-of 2.5 times the actual rate. Soil testing Should be performed in the most limiting layer of soil to a depth of four feet under!he-,infiltration area. It is piopusA- t,:)place the system in the subsoil layer- If the underlying laver is less permeable, tN3 design may result in breakout at dow. nhd aitxectioos- In addition, the depth of subsoil is only two ba d)-ree,feet. Reference-, wa have reviewed recommend four feet of permeable sod under the&ys<ew- 1j) Q 9- Lt is 114JL ctmr"Olat 13c*o&.1cq was used to develop rmieff rates fcr _h�site. North Lapearsth he tdalilv- A- ildc,-ver typically fe-quir-as-xs�,:)f the SCS MethO-1 I r P a:t calc 1 1 hake Ute.n pufor:wd for the lut area,a -Abayta plao uns not pro-6ded to identify the iT provided forl-noth existilic,and proposed udy. area. A,si6area plan should& coudi-fions and idewffy soils.Occ-A.-er types and conditions and flow paths,used to &-terrnme tirip-sof concentration. In addition,we disagree kith Lh-_ass.wVtior_that ffi--time on x.ncentration will be ncarbv doubled by con,-trucudon lbe dri-veway, This iriveN❑ay is pwvzd and has glades to 12%. Runcff is EltLi to tt WVd Ji 14LthO cjtjti,evvay fester ffi;.n it vvoidd flow-Airough the emsting yvoDds. Tte rll)10t4cll Used too compute-the time of ccRcntrafijyo&)cs-t-)ot include any-variables for suifacc condifir•ns. 141.It is unclear ao ►the plan areas that sufficient c ient are.a tri _anr Ir the I cac lungzy to m6f.v the.design, A plan iridicaiin(i rxiotf Elw4n to each leaching s-,'Sttem should he p:rcn,4&:1 to demcwstr3te that the system wit' operate as designed_ ,iAie appre6ate the ctpportuinity to assist rhe.Planning Board cift this pn3jeCt and liope Mat this mformaticn is sufficient f,3r,,,,:)uT needs. If you haw any questions P-ease do not he-3itatc to contact us. I Very I.rul,.ip:)urs, NIC M&COLANTONIO, I Ohn C Chessia,P.E. xc Chri:;timsen Seems 0 CA Q Q Gn Oil !III l I PROFESSIONAL ENGINEERS AND LAND SURVEYORS 160 SUMMER STREET HAVERHILL, MASSACHUSETTS 01830 (508)373-0310 FAX: (508)372-3360 September 13 , 1996 � Ms . Kathleen Colwell Town Planner 146 Main St . No. Andover, MA 01845 RE: 1750 Great Pond Road Michael Rullo 1 1 Dear Ms . Colwell : In response to your recent letter, I offer the following comments . 1 . I suggest that soil tests be added as a requirement of the special permit . The soil test can be done prior to construction and if problems are found, a provision allowing the project to be modified should be included. As well as being a professional engineer, I am certified by the Commonwealth to perform soil tests . My certification of the results should be sufficient . 2 . The abutters have been added to the plan. 3_. The driveway slope has been added. 4 . Retaining wall details have been provide. 5 . Retaining walls and storm water mitigation areas have been added. 6 . The paved area extends across the from of the garage to allow access to the garage and 30 feet away from the garage to allow for turn around of cars backing out of the garage . I I I i i i Colwell, Sept 13, 1996 Page 2 i 7 . The storm water from the lower portion of the drive is untreated because it would require' locating a structure on town property. I am sure this is a minimal impact . i The Construction Phasing Plan and and Emergency Response Plan are attached. i i Very trul your` l r t Phi . IChristiansen PGC;lc i I I i i i s I I i i I 1 i w INC. PROFESSIONAL ENGINEERS AND LAND SURVEYORS 1601 SUMMER STREET HAVERHILL, MASSACHUSETTS 011830 (508)373.0310 FAX: (508)372-3960 September 11 1996 v�� wI Ms . Kathleen Colwell !I p Town Planner 146 Main St . P AN N I BO/',",'il, D No. Andover, MA 01845 � RE: 1750 Great Pond Road Site Plan Review Comments from Coler & Colantonio Dear Kathleen: I offer the following comments in response to the September 6, 1996 letter from Coler & Colantonio. 1 . we made revisions to the previously approved plan to satisfy suggestions of an abutter and the watershed Council . The revisions were made on a new plan and such details as the locus plan which was on the original plan was not included in the revision. To resolve the difficulty that this caused Mr. Chessie, I have provided a property plan of the site that includes a locus plan. The soils are in fact, a Paxton as can be seen from the attached copy of the SCS soils map. The soils tests on site which were sent to Coler and Colantonio show top and sub soil to a depth of 2 .5 to 3 feet and a loose sandy till to a depth of 6 feet . The parent soil usually associated with a Paxton soil is 4 to 6 feet below the surface. It must be understood that the description listed by Mr. Chessie is a generalized description and the soil tests we did are more descriptive of the soil . 2 . The stone wall, utility pole and catch basin along the frontage is shown on the plan submitted by Mr. Rullo. The revised plan does not have these features but I have included herewith the original plan that contains those features . Retaining walls are shown on the plans with a maximum height of 4 feet . The walls would most likely be precast concrete units . 3 . Property line information is attached. 4 . Great Pond Road at this location has a good sight distance. i Colwell, 9/11/96 Page 2 i 5 . We have added the parking space at the request of the Planning Broad and located the driveway on the westerly side of the property to accommodate a neighbors suggestion. Both of these accommodations require the wall and the parking space in the right of way. 6 .' The catch basin detail has been changed as requested. '; 7 .'i The septic system plan included shows the soil test locations . Additionally, the SCS information to which Mr'. Chessie referenced shows the water table to be greater than 6 feet. The soil tests we did showed the water table at 8 feet. To avoid any further delays of arguing back and forth with Mr Chessie over drainage issues ` I have provided� a design that is sized to retain all of the excess volume j of water generated on the site. The 'details of the design are on the plan. i I hope we can close the meeting and issue the decision on Tuesday, September 17, 1996 . ve truly you P lip? Christiansen r PGC;lc i i III `I I , i I ' i I I I r. COLER & COLANTON 10 7 1r-iJiAPPR- A�,J;-I -rj i September 23, 1996 I Ms, Kathleen Colwell Town Planner 120 Main Street North Andover, MA 01845 RE: Supplemental Engineering Review 1750 Great Pond Road Site Plan Submittal Dear N/Ts, Colwell: At your request., Coler& Colantonio, Inc. has reviewed the revised plans for the above I referenced pro"iect. It.is our understanding that the Planning Board has closed the hearing aiid is preparing a list of conditions for site plan approval. This correspondence follows i the same numbering sequence as our previous review, Comments have been modified to 3 be used in the approval conditions. We offer the following comments: 1, No comnient required. '12, The requested in-Comiation has been indicated on the plans. Satisfactory, 4. If it.appears that sight distance is inadequate, brush should be cut to allow sufficient sight distance. This could be determined in the field during construction. 5. J'he Planning Board has addressed construction in the Town right of way, 6. We recommend a cast iron catch basin grate be provided with suitable openings for the flow. 1 7, We recommend that testing be performed at the location of each proposed leaching facility. Testing should be performed by a certified soil evaluator and witnessed by an agent of the town, The infiltration systems have been redesigned to have adequate volume to store the entire increase in a 100 year storm event, Provided i that the soil has adequate permeability to allow runoff to infiltrate between rainfall b, 1 Accord Park Drive, SLOO One 617-982-5400 Norwell, MA 02061-1685 Fax 617-982-5490 i I events and sufficient depth above groundwater to allow r ulloff to infiltrate, the design is acceptable. We reconmiend that three to four feet separation. between the bottom of the facility and maximum groundwater elevations be provided and that soils have a percolation rate of 30 min./in. or faster, In addition, consti ictiott specifications should include scarifying the base of the excavation to prevent j clogging of the soil and not allowing equipment to pass over the leaching area until i sufficient stone is placed to support the equipment without disturbing the underlying soils. 8. ,See 7, above. 9. :satisfactory, see 7. above. 10. We recommend that a cape cod berm be,added upgradient of catch basins to direct flow to the proposed outch basin inlets. We appreciate the opportunity to assist the Planning Board on this pro ect and hope that j this information i5 sufficient for your needs. If you have any questions please do not hesitate to contact ors, Very truly yours, COLER& COLANTONIO, INC, John C. Cl�essia. P.E, xc Christiansen & Sergi i i i i { i i � F GHRISTIANSEN & SERGI, INC. PROFESSIONAL ENGINEERS AND LAND SURVEYORS 160 SUMMER STREETT HAVERHILL, MASSACHUSE-rrs 01830 (508)373-0310 FAX: (508)372-3960 September 24, 1996 Ms . Kathleen Colwell Town Planner 146 Main St . No. Andover, MA 01845 RE: 1750 Great Pond Road Site Plan Submittal Sept 23, 1996 Letter of Coler & Colantonio Dear Ms. Colwell : I offer the following comments in response to the September 23, 1996 letter from Coler & Colantonio. 1. Mr. Rullo has agreed to install a blind driveway sign and will cut the brush along his frontage if it is required of him. He does not object if it is part of the order of conditions . 2 . Mr. Chessie' s comments concerning a 4 foot separation between the infiltration trenches and groundwater and requiring a less than 30 minute/inch percolation rate make design of a stormwater infiltration system on this property difficult . These requirements coupled with the decision of the Watershed Council for us to amend our original design from pervious pavement to a catch basin infiltration system make the land extremely difficult to develop. My original design can meet Mr. Chessie' s criteria far more easily than can the design requested by the Watershed Council . We should not be put is a position where compliance with one request causes us non compliance with another. The test pits we conducted in 1992 showed water at 8 feet deep in only 1 of 3 holes . There wasn' t water in either of the other holes . However, if we were to do soil tests today using soil mottles as an indicator of groundwater I am sure the mottles would appear at 4 feet or higher. That is because mottles can appear at soil transition and also because relic mottles can reflect a water table that no longer exists . i Colwell, 9/24/96 Page 2 i I While the percolation tests we conducted were at a depth of 8 feet and were 11 min/inch or less, I do not think it is reasonable to request that tests be faster than 30 min/inch. Whether the soil percolates at '2 min/inch or 90 min/inch, water is still moving through it and the size of the infiltration; system is reflective of the percolation rate. i We will do; soil tests and percolation tests as your request . These tests can be witnessed by the Town. The results of the test may ,require that the top 3 infiltration areas be moved down slope so that the 4 foot separation Mr. Chessie requires can be met and the catch i basins be abandoned on the two lower infiltration areas to allow them to be raised to a higher elevation to comply with Mr. ' Chessie' s comments . 3 . We have added a cape cod berm to the plan as requested. i Attached are revised plans . If you have any questions, please call . <i i Ver ly o hi Christiansen PGC;lc ` I cc: J. Chessie I 1 i i I `J I I i i i { I I