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HomeMy WebLinkAboutSW7060809_HISTORICAL FILE_20090914STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW y� DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS HISTORICAL FILE ❑ COMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD N MCOOWELL VE ASSOC/AYES, P.A. ENGINEERS SURVEYORS Post Office Box 391 1899 Weeksville Road Elizabeth City, NC 27907-0391 September 11, 2009 Mr. William J. Moore Environmental Engineer Department of Natural Resources and Community Development 943 Washington Square Mall Washington, NC 27889 -.�,. RE: Stormwater Permit for Dorm Project Elizabeth City State University Campus Permit No.: SW7060809, dated March 6, 2007 (Mc/A: E1693) Dear Bill: William P. McDowell, III., P.E., P.L.S. Telephone: (252) 338-4161 Fax: (252) 335-9585 akl� 14 20C9 This letter is for the purpose of following up with our telephone conversation last week and your e-mail to me dated September I, 2009, (a copy of which is enclosed for ease of reference). The above referenced Permit SW7060809, dated March 6, 2007, was issued for a proposed Dormitory project on the campus of Elizabeth City State University; however, the dorm building is being relocated approximately 800 feet to the north due to very expensive utility extensions (chiller lines) at the original proposed location. All permits (Erosion, Stormwater, and 404 Wetlands) were obtained in 2007 for the original project. The scope of the project for the new'dormitory location includes intercepting an existing storm drain and rerouting it around the new dorm footprint, and also doing slope and diameter improvements to the storm drain from the new dorm location to the approved storm water pond. 1 am enclosing herewith two (2) copies of adrawing which indicated both the old dorm location and the new dorm location. Said drawing shows the location of the drainage basin, which we refer to as Basin `C'. Both the old location, as well as the new location, are within Basin `C'. We have purposely not changed the approved storm water pond, either in location, design, or size since it was already in the best location for handling runoff from Basin `C'. In your e-mail to me dated September I, 2009, you stated that we would not have to resubmit this project and could use Permit No. SW7060809, dated March 6, 2007, as long as: Mr. Bill Moore September 11, 2009 Page -2- 1. The drainage basin area and pond design would not change. 2. The impervious area had not increased and that the dorm building would be located within the same drainage basin. 3. The requirement treatment volumes / area/ methods would remain essentially the same as originally permitted. All three of these statements are true. If you have any questions or need anything else from us regarding this project, please do not hesitate to give me a call. Thank you for your assistance in this matter. Sincerely, Don A. Bunch Senior Engineering Technician DAB/rae Enclosures CC: Mr. Charles Hall, ECSU (w/ enclosures) Mr. Anthony Hunt, Architect (w/ enclosures) RE: Oranges to a Stormwater Approved Dorm Project a ECSU Subject: RE: Changes to a Stormwater Approved Donn Project @ ECSU From: "Moore, Bill" <bill.moore@ncdenr.gov> Date: Tue, I Sep 2009 15:09:44 -0400 To: Don Bunch <donbunch@embargmail.com> _ Good Afternoon Don, I have the following understanding based on the info you provided about this project: 1) The drainage basin areas & pond design will not change. 2) The impervious area has not changed; dorm bldg will be relocated within same drainage basin. 3) The required treatment volumes/areas/methods will remain essentially the same as originally permitted. If the above circumstances are correct; then you need only send a full scale, revised plan sheet (as shown in your attached pdf file), along with a cover letter containing explanation as provided in your Email. We will place the revised plan in our permit file for future reference. If relocating dorm will involve any increase in BUA, increase in drainage basin, change in pond design; then you will need to submit a sw application, fee & request for permit modification. Hope you & the folks at McDowell have a great week. From: Don Bunch(mailto:donbunch@embargmail.com] Sent: Tuesday, September 01, 2009 9:59 AM To: Bill Moore Subject: Changes to a Stormwater Approved Dorm Project @ ECSU Bill, This discussion concerns a proposed Dormitory project on Elizabeth City State University campus, which had a proposed SW Pond that you approved on 3-6-07 (Permit No. SW7060809). I discussed this project very briefly with you several months ago, at the Hardee's in Moyock, because I had just found out that ECSU & the Architect had decided to move the proposed dorm building to a location approximately 800' to the north, due to very expensive utility extensions (chiller lines) at the old location. (we had just obtained all permits including Erosion Control, 404 Wetlands, & Storm Water) I have attached a pdf file (2436" plotted @ 1" = 60') that indicates both the old & new dorm locations. The drawing also shows the location of the drainage basin that we refer to a Basin "C", which contains approximately 14.2 Acres. As the pdf drawing indicates the new dormitory is still within Basin "C". The scope of the project for the new dormitory location includes intercepting an existing storm drain and rerouting it around the new dorm footprint, and also doing slope & diameter improvements to the storm drain from the new dorm location to the approved Storm Water Pond. I am unsure of how to make a submittal for this change, or if a formal submittal is even necessary. I realize that you may need additional information to complete a review, or to approve this revision within the drainage basin that contributes to the approved pond. I will be happy to provide any additional information that you may need, answer any questions over the phone, or plan to visit your office to go over this in more detail. Please let me hear from you when you have time to discuss further. I o f 2 9/ 11 /2009 10:33 AM r William P. McDowell, III, P.E., R.L.S. McDOWELL & ASSOC/ATES,PA. ENO/NEERS• SURVEYORS Post Office Box 391 1715 Weeksville Road Elizabeth City, NC 27907-0391 December 27. 2006 Mr. William J. Moore Environmental Engineer Department of Natural Resources and Community Development 943 Washington Square Mall Washington, NC 27889 RE: Erosion Control & Stormwater Management Facilities Associated with New 284 Bed Dormitory Elizabeth City State University Campus Your Number: Pasqu-2007-003 (Mc/A: E1693) Dear Bill: Telephone: (252) 338-4161 Fax: (252) 335-9585 DEC 2 8 2006 I am sending to you two (2) copies of revised Plans, Sheets I of 2 and 2 of 2, dated December 27, 2006, for the above referenced project. These plans have been revised based on recommendations you made during a recent visit to Elizbeth City. The revisions are as follows: Revised the configuration of the inlet end of the outlet orifice piping to make it easier to do maintenance / cleanout (See Sheet 2 of 2) Revised the planting on the perimeter shelf to be "wetland species", and also provided contact for purchasing same. (See Sheet 2 of 2) Revised the detention pond outlet, by eliminating the riprap within the wetland area. (See Sheet 1 of 2) If you have any questions or desire any additional information, please do not hesitate to give me a call. Sincerely, `�Rdft /a, etlf Id Don A. Bunch Senior Engineering Technician DAB/rae Enclosures CC: Ms. Wilma Jordan, ECSU la il`,i t5 r ECSU 274 Bed Dorm Pond Sizing.xis Date:August 4, 2006 Project: ECSU Proposed 274 Bed Dorm - Wet Detention Pond McA Proj. #: E1693 A.) Determine Pond Water Surface Area (SA/DA): AUG 11 2006 SA/DA Values listed below are from "Coastal" Chart, with no vegetative filter, For Permanent Pool depth of 6', Total Suspended Solids (TSS) Removal = 90% Basin "C" from ECSU Schematic BMP Plan !includes tha Prnnngnrl 97d Rail rinrml Impervious Area % SA/DA Value % Contributing Basin (Ac) Water Surface Area Ac. 30 1.6 14.2 0.227 40 2.1 14.2 0.298 50 14.2 0.383 60 3.4 14.2 0.483 70 3.9 14.2 0.554 1/ 700 S{ KEG /9 7 94- r"-- PQ� ✓. (. 437aC_) B.) Determine Required "Temporary Pool" (Storage Volume Above Permanent Pool): Pond designed to hold the volume equivalent to 1" of rainfall on the entire Drainage Basin: (Note: no allowance to be made for type of surface, "c" factor, etc. - simply 1" over entire basin) Cal culate ?B Above:: Contribr.Area, zAc Cu Fhof stora e 1 ' '1 .. Acre Ftof Storage . i °, 14 201 . •. 51544 RVI _ (minimum) s 77? c { R C C.) "Temporary Pool" Volume Calculations (Volume above Permanent Pool ): Ski /SQ PO Location Elevation Area in Sq Ft. (ACAD) Volume (Cu Ft) Volume (Cu Yd.) Top Temp. Pool 5.85 25,681 Bottom Temp. Pool 3 19,794 ?51;159• :: ` .-' ' 1895 2.25 t I emp. Pool ueptn ) FT,"emporary,tStdrage" Required=.51,5,44 CF (Minimum). -Provided = 51,159CF Note: Provided Volume slightly less than required - should be OK, Since most Conservative method used to determine the volume of the Temporary Pool, and also no volume counted in pipe system. Page 1 of 3 J D.) "Permanent Pool" Volume Calculations - These include Forebay(s): Location Location - Elev. Area in Sq Ft. Volume Cu Ft Volume Cu Yd. Top Perm. Pool 3.60 19,794 Bottom of shelf 2.60 13,852 16823 623 Bottom of Forebay, -0.40 7,369 31832 1179 & Main Pond Main pond Only -0.40 5,803 Bottom Main pond -2.40 4,091 9894 35L .;58549; -_ 2168 E.) "Forebay" Permanent Pool Volume Calculations: Location Location - Elev. Area in Sq Ft. Volume Cu Ft Volume Cu Yd. Top Perm. Pool 3.60 8,222 Bottom of shelf 2.60 4,308 6265 232 Bottom of Forebay 1 -0.40 1566 8811 I M Forebay / Main Pond % _ 15076 58549,. • (OK Pdrd Oversized);« -- Page 2 of 3 558 Goal = 20% r i ECSU 274 Bed Dorm Orifice.xls Date: August 4, 2006 Project: ECSU Proposed 274 Bed Dorm - Wet Detention Pond McA Proj. # E1693 Determine the Orifice Size (Diameter) for Controlling the Detention Time of the "Temporary Pool" F.) Calculate Orifice Size for Outlet Structure: Volume Calc Detention Time for Orifice (4") Pond Elev Area (Sq Ft) Volume Cu Ft Feet of Head "CFS "Velocity Flow Time Min Avg. 5.85 25,681 12,270 1.82 0.39 4.60 524 5.00 23,398 11,051 0.90 0.28 3.50 658 4.00 20,804 10,150 0.20 0.09 2.00 1880 3.60 19,794 I otal Min 3062 Total Days 2.13 OK - Regulations = 2-5 Days " Flow (CFS) thru Orifice sized as shown & Velocity calulated by "TR-55" Software for a Borda" type orifice - 0.51 C. Page 3 of 3 I 11 Lkil Ll� U V Is LD AUG 1 2 2000 1� FINANCIAL RESPONS ILITY/OWNERSHIP FORM SEDIMENTATION POLLUTION CONTROL ACT ;iN-5 P&SIOPS80boloitiat any land -disturbing activity on one or more acres as covered by the Act before this I °:t::fo,rtipfAf�gG�gN.c�pbl erosion and sedimentation control plan have been completed and approved by the Lan.C. Department of Environment and Natural Resources. (Please type or print and, if the question is not applicable or the e-mail and/or fax information unavailable, place N/A in the blank.) Part A. 1. Project Name Erosion Control & Storm Water Management Facilities for Proposed Site Improvements Associated with New 274 Bed Dorm at Elizabeth City State University 2. Location of land -disturbing activity: County Pasquotank City or Township Elizabeth City Inside Highway/Street East of NC Highway 34, North of Weeksville Road Latitude 360 17' Longitude 760 13' 3. Approximate date land -disturbing activity will commence: November 2006 4. Purpose of development (residential, commercial, industrial, institutional, etc.): Site Improvements Associated with New 274 Bed Dorm at Elizabeth City State University 5. Total acreage disturbed or uncovered (including off -site borrow and waste areas): 9 acres 6. Amount of fee enclosed: $450.00. The application fee of $50.00 per acre (rounded up to the next acre) is assessed without a ceiling amount (Example: a 9-acre application fee is $450). 7. Has an erosion and sediment control plan been filed? Yes xx - attached No Enclosed 8. Person to contact should erosion and sediment control issues arise during land -disturbing activity: Name Don A. Bunch E-mail Address I donbuch@earthlink.net Telephone 252-338-4161 Cell It Fax If 252-335-9585 9. Landowner(s) of Record (attach accompanied page to list additional owners): State of North Carolina Name 1704 Weeksville Road Elizabeth City, NC 27909 10. Deed Book No. 509 Page No. 628 I0Tii=I 252-335-3959 Telephone Provide a copy of the most current deed. 252-335-3960 Fax Number 1. Person(s) or firm(s) who are financially responsible for the land -disturbing activity (Provide a comprehensive list of all responsible parties on an attached sheet): Elizabeth City State University Name 1704 Weeksville Road Elizabeth City, NC 27909 E-mail Address Telephone252-335-3959 Fax Number 2. (a) If the Financially Responsible Party is not a resident of North Carolina, give name and street address of the designated North Carolina Agent: Name E-mail Address Current Mailing Address Current Street Address City State Zip City State Zip Telephone Fax Number (b) If the Financially Responsible Party is a Partnership or other person engaging in business under an assumed name, attach a copy of the Certificate of Assumed Name. If the Financially Responsible Party is a Corporation, give name and street address of the Registered Agent: N/A Name of Registered Agent E-mail Address Current Mailing Address Current Street Address City State Zip City State Zip Fax Number The above information is true and correct to the best of my knowledge and belief and was provided by me under oath (This form must be signed by the Financially Responsible Person if an individual or his attorney -in -fact, or if not an individual, by an officer, director, partner, or registered agent with the authority to execute instruments for the Financially Responsible Person). I agree to provide corrected information should there by any change in the information provided herein. Mr. John Smith Director of Design & Construction Ty �®rnrt n me Title or Authority g-9-o(, Sig4lature Date --------------------/--n-- l, , a Notary Public of the County of A State of North Carolina, hereby certify that John Smith appeared personally before me this day and being duly sworn acknowledged that the above form was xecuted by him. Witness my hand and notarial seal, this day of 2006 C Notary Seal c/ '1 My commission expires b �U ECEoWE D AUG 12 2006 LAND QUALITY SECTION WASHINGTON REGIONAL OFFICE Project Narrative Project: Proposed Site Improvements associated with New 274 Bed Dormitory Location: Campus of Elizabeth City State University Date: August 4, 2006 Existing Site Description: The Elizabeth City State University campus property is generally flat, at an elevation which is approximately 10.0 feet above MSL. The campus is divided by an existing stream which traverses the campus in an east to west alignment, and flows in a westerly direction under Herrington Road, then into Charles Creek, and finally into the Pasquotank River. The existing stream receives runoff from drainage basins north and south of the stream, through a combination of ditches, catch basins, and pipes. The existing percentage of impervious area was calculated in 2001 at approximately 28%, for the entire campus, which included a large area of wetlands / swamp that are not suitable for new buildings. The ECSU campus currently has 2 wet detention ponds that provide treatment for the runoff from their respective drainage basins. (See "Schematic Storm water BMP" map on sheet 2 of 2 of the Site Plan for the location of the 2 existing ponds, as well as the proposed pond for this project) Proposed Development: ECSU is proposing to construct a new 274 bed Dormitory, within drainage basin "C", as indicated on the "Schematic Storm water BMP" map, and the provided Site Plan. Drainage Basin "C" is upstream of the new Dormitory, and is approximately 14.2 Acres in size. Using the ECSU "Campus Master Plan" prepared by the Freelon Group, we have calculated the combined future and existing impervious area to be just under 50%, within Basin "C", so we have designed the new detention pond to accommodate an impervious rate of 50%. We propose to intercept the existing drainage that flows toward the proposed Dorm site through an existing 24" culvert, and divert this run-off through a new pipe system to the proposed wet detention pond. The proposed Wet Detention Pond will be No. 3 on ECSU Campus. As mentioned above, the new pond is designed to accommodate a 50% impervious rate, and detain the flow from a 1" rainfall over the 14.2 Acre basin for a period of 2-5 days. The proposed pond has a water surface area is 0.45 Acre, permanent pool depth of 6 feet, and is sized per the SA/DA chartfor Coastal counties, without a vegetative filter, which should remove 90% of TSS. 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FHLt'4Y JSP11al Pasquotank River inr - cm I ■PO rm r' ""x -'t <�..a r .."jqt (Class WS III Sw) It - ELI A T CITYi �' i '" \i 3 s� lwfa oitage - Point,'. 1 \ .\` , �`' "en Charles CreekA o1 f { \ Naw > f (Class C Sw) T ' Light_ 1_ I��"t�#''-r^r'= "1 Wlp/rgggg{ll7yy�w od,�C fTi '�„f"lY{,f.fofbes 2 ../ C, P< .tp?_- 9a'`�+I1' � Pa fa � ✓.L kr Je 2ra1 y Sch �..>t Q ,�ipR3.. `'§� ' 11S"1'V lY✓mot - __ 'Y PARKVfEtY .a t.h 'u. J •y. 1N i... oL p �? Pas uotank \`f' 1 r a' , � : �tX' 1�i r t� 'f7 "• , 'r � Sc h�.y��?,,. �U > • � C .i'f`L' .a, f/ e."\^''`� _ �1�16 ion P 7 Campus of T, Elizabeth City c2 State University`o9T `W M +< �� � Tank. of +• •F_ xf .�: In i ^s � I 7 Scale �1 "k=L 2®00'1 a,Lamsh u�r qt'°y�e )0,f f 1000' 2r,,.o' , ,z 2000: "-'"u'�1. • T t A kr. F•' 7.5 Minute Series Quad named "Elizabeth City" showing area of "Elizabeth City State Univ." Plot Scale: 1" = 2000' Plot Date: 8-04-2006 Detention Pond \,4 , 3 =1 K i "IF, k t Y t i k' d , f1 � ' atioller ry V -•x1�7,,.�. sjji1 y OCR�Bayside �l / AP WDOWELL & ASSOCIATES, P.A. ENGINEERS • SURVEYORS P. O. BOX 391 1715 WEEKS%ALLE RD. ELIZABETH CITY, NORTH CAROLINA (252) 338-4161 FAX (252) 335-9585 Date: Aug 04, 2006 Project: ECSU 274 Bed Dorm Pick proposed swale with the largest area upstream of outlet & calc. the velocity on the downstream end Use the "Rational Method" with following assumptions: a.) Area = 0.6 Ac b.) Coeff. (weighted) 0.60 c.) Intensity = 5" rainfall CFS = 0.6 (0.60) (5) = 1.8 CFS (Compute velocity in proposed swale flowing 1.8 CFS with 4:1 side slopes, and a drainage slope of 0.25%) Channel Calculator Given Input Data: Shape.. Trapezoidal ("W type with 4:1 side slopes) Solving for ..................... Depth of Flow Flowrate ........................ 1.8000 cfs Slope ........................... 0.0025 ft/ft Manning's n ..................... 0.0200 Height .......................... 2.0000 ft Bottom width .................... 0.0000 ft Left slope ...................... 0.3300 ft/ft (V/H) Right slope ..................... 0.3300 ft/ft (V/H) Computed Results: Depth ........................... 0.6058 ft Velocity ........................ 1.6187 fps (permissible velocity for Site soils) Full Flowrate ................... 43.5052 cfs Flow area ....................... 1.1120 ft2 Flow perimeter .................. 3.8660 ft Hydraulic radius ................ 0.2876 ft Top width ....................... 3.6713 ft Area ............................ 12.1212 ft2 Perimeter ....................... 12.7642 ft Percent full .................... 30.2883 % Critical Information Critical depth .................. 0.4658 ft Critical slope .................. 0.0101 ft/ft Critical velocity ............... 2.7375 fps Critical area ................... 0.6575 ft2 Critical perimeter .............. 2.9729 ft Critical hydraulic radius ....... 0.2212 ft Critical top width .............. 2.8232 ft Specific energy ................. 0.6465 ft Minimum energy .................. 0.6987 ft Froude number ................... 0.5185 Flow condition .................. Subcritical IE C LEE Y[ AUG E LAND QUALITY SECTION 1103MGIONAL OFFICE Auu 1 1 2006 Project Narrative Project: Proposed Site Improvements associated with New 274 Bed Dormitory Location: Campus of Elizabeth City State University Date: August 4, 2006 Existing Site Description: The Elizabeth City State University campus property is generally flat, at an elevation which is approximately 10.0 feet above MSL. The campus is divided by an existing stream which traverses the campus in an east to west alignment, and flows in a westerly direction under Herrington Road, then into Charles Creek, and finally into the Pasquotank River. The existing stream receives runoff from drainage basins north and south of the stream, through a combination of ditches, catch basins, and pipes. The existing percentage of impervious area was calculated in 2001 at approximately 28%, for the entire campus, which included a large area of wetlands / swamp that are not suitable for new buildings. The ECSU campus currently has 2 wet detention ponds that provide treatment for the runoff from their respective drainage basins. (See "Schematic Storm water BMP" map on sheet 2 of 2 of the Site Plan for the location of the 2 existing ponds, as well as the proposed pond for this project) Proposed Development: ECSU is proposing to construct a new 274 bed Dormitory, within drainage basin "C", as indicated on the "Schematic Storm water BMP" map, and the provided Site Plan. Drainage Basin "C" is upstream of the new Dormitory, and is approximately 14.2 Acres in size. Using the ECSU "Campus Master Plan" prepared by the Freelon Group, we have calculated the combined future and existing impervious area to be just under 50%, within Basin "C", so we have designed the new detention pond to accommodate an impervious rate of 50%. We propose to intercept the existing drainage that flows toward the proposed Dorm site through an existing 24" culvert, and divert this run-off through a new pipe system to the proposed wet detention pond. The proposed Wet Detention Pond will be No. 3 on ECSU Campus. As mentioned above, the new pond is designed to accommodate a 50% impervious rate, and detain the flow from a 1" rainfall over the 14.2 Acre basin for a period of 2-5 days. The proposed pond has a water surface area is 0.45 Acre, permanent pool depth of 6 feet, and is sized per the SA/DA chart for Coastal counties, without a vegetative filter, which should remove 90% of TSS. Page 1 of 1 .y„9 1 c 1x 1i15.xFlal,f . i'- ♦ ` 'tii` �'. s 1laq�� 1/NJIAt tail' i , �,� % .. Fq" q 1 w . IA asSl; c, cs �� urn�a ° PasquotankRlver M�pl (Class WS III Sw) n, Charles Creek (Class C Sw) Campus of Elizabeth City State University M tft,yy���� WO 1000q �O '�2000r ' 6 F''i "", 7.5 Minute Series Quad named "Elizabeth City" showing area of "Elizabeth City State Univ." Plot Scale: 1" = 2000' Plot Date: 8-04-2006 14 ?EMOU NK�# Slaw A, aYski q, - IR sad. Proposed Wet v29 14 Detention Pond Kn•; wa Y a �t 1 � I Park ��rs' t 410 McDOWELL & ASSOCIATES, P.A. - ENGINEERS - SURVEYORS P. O. BOX 391 7715 WEEKSVILLE RD. ELIZABETH CITY, NORTH CAROLINA (252) 338-4161 FAX (252) 335-9585 DW0/b1RRD Fox :252-946-9215 W Tr.y.n s mit Con-F- P-eprrt kk P. 1 Nov6 ' 06 16 :28 Telephone Plumber Mode Start Time Pages Result Note 912523359585 NORMAL 6,16:26 1'11" 2 k D K IMMA NCDENR DIVISION OF WATER QUALITY 'WASHINGTON REGIONAL OFFICE WASHINGTON, N.C. 27989 Phone:252-946-6481 FAX:252-946-9215 TO: poij IJvnc 4 FAX NO. ZS2 3 35 - 9S8s` FROM: �� MOO ~� DATE: �//6 le. NO. OF PAGES (INCLUDING COVER): Z- COMMENTS: 9 :e z 7Tlet4-40 Ate. G roes- /�� McDOWELL & ASSOC/ATES,P,A. (/�/( per,® ENGINEERS • SURVEYORS Post Office Box 391 1715 Weeksville Road Elizabeth City, NC 27907-0391 August 7, 2006 Mr. William J. Moore Environmental Engineer Department of Natural Resources 943 Washington Square Mall Washington, NC 27889 RE: Erosion Control & Stormwater Management Facilities Associated with New 274 Bed Dormitory, Elizabeth City State University Campus (Mc/A: E1693) Dear Mr. Moore: William P. McDowell, III, P.E., R.L.S. Telephone: (252) 338-4161 Fax: (252) 335-9585 -ALV. LIA AUG 11 2006 Enclosed please find for your review and approval, the following information on the above referenced project: 1. Two (2) copies of Site Plan, Sheets 1 of 2 and 2 of 2, dated August 4, 2006. 2. Two (2) copies of an executed North Carolina Stormwater Management Permit Application (SWU-101) with the "Wet Detention Pond" Supplement (SWU-102) Check in the amount of $420.00, as payment of the required review fee for a "High Density" application. 4. Two (2) copies of supporting information: A. 75 Quad Sheet of Project Area (l page) B. 8-1/2 x 11 Project Narrative (1 page) C. Calculations for Pond Volumes, Surface Area, etc. (3 pages) D. Copy of Wetland Delineation Map for ECSU, dated 8/20/02 E. Copy of Soil Report prepared by GET Solutions, dated 1/30/06 This project involves the construction of a proposed 274 bed dormitory and other associated work items, such as gravel access roads for site access, proposed wet detention pond, and cleanout of existing wetland channel / ditches, per site plan. Please see the attached "Project Narrative" for a general description of the existing site conditions, as well as the proposed development. Mr. William J. Moore August 7, 2006 Page -2- This submittal application and site plan covers all the disturbed land area associated with the new dorm construction (9.0 acres). We have checked all proposed swales along the gravel access roads for any excessive velocities for the soil type. (Please see the attached "Channel Calculations.") At approximately Station 3+00 on the proposed gravel access road on Sheet 1 of 2, the existing drainage flow will enter our proposed swale. The existing ditch at this location is draining nearly the entire basin, so we have proposed the portion of the proposed swale downstream of this location to be protected by using a straw erosion control blanket on both side slopes, to the proposed cross drain culvert, which is approximately 75 feet. All other drainage will reach the proposed wet detention pond by the proposed system of pipes and drop inlets. All inlet basins are designed to be sediment traps installed during the construction period. The proposed wet detention pond will be the third on ECSU's.campus, and is designed to provide water treatment for an upstream basin of 14.2 acres, which will ultimately have 50% impervious. The proposed pond has a water surface area of 0.45 acres, permanent pool depth of 6 feet, and is sized per the SA/DA chart for Costal counties, without a vegetative filter, which should remove 90% of TSS. Should you have any questions concerning this data, please do not hesitate to contact me. ncerely,ct�n h l�l. / ✓� Don A. Bunch Senior Engineering Technician DAB/rae Enclosures CC: Mr. John Smith, ECSU Mr. Anthony Hunt, Millennium 3 Design Group PCOK 5 0 ') ;d(,L ( ; —" Is .... ........... :11--11 a, I c t t . ..... 01 C.11M, of iqi 1 1 i.,m arnm oyl III P.V. L'll. IOU, Cur rittick N. C, 27929 1hi. tqjjjj,, Bruinscy, H11kfj Drilf NORTI I CAROLINA GFNERAL WARRANTY DEED 'I HIS llrj, IN, 17 t 1j,' ,.f A,,,., t, , t w. 90 b, —d Lnwem CRANIU:: I 0 RAN 1 E P. C. HOLLAND W%BSTE'R, U ...... Irried; and I THE SrATE OF NORTH CAROLINA GUNi W(AIS-11M OWt::S, a free trader /o State Property office 116 IiOSL J0110S Street Raleigh, N.C. 2760) Cued No qo-ZP,� PAF�UOIANK CO�'JTV,Y- wG Nub LAND ��p1SECTION RiGION'b'L OWa I m , r ,. . y,, ...... 1r C.­ ,, ., ... : ­11. , ........ ,, " ...... ..... .... .. —.'. " '."­ ......... . . . . lt," MTNESSETJE. lhnl lh. Gemo r. f lql]ru1d1 ,.id b, Ill, !ha nr,,ij, o which .1 here I, by I, n— —'—t� -1-j- bIll—, .�Il —drnlall 1h.' '.I.M —,I lilmlt,-4 lm. tF., (lty ..( . . ... . I . I I . . . To..,hi, Pa5C.UctAn'.,, t!0!;C1iht1d in Allnuxn.d F%hihit A, Exhibit A b"irq "Exhibit A attachcli to a Deed dated AuU.st 17.1t, 1990 f:'O:.i G. Iclla,id unmarried and Gene WCbSLCC 0,'ori, a free trader to the siatc Of North Carolina.,, 7, 5z" , , (),[ ,LC ftZLLECt0n PASQWTM4XCMWY T" ocoK 5GJPAGE G29 .. EXHIBIT A' .i F.%IIIAIT A ATI'ACIIY.D TO A DEED DATED AUGUST 17, 1990 FROM G. i(OId.AND WFI)STER, UMA(GIi F:b AND GERE WEBSTER OWES, A FREE TWER TO THE STATE OF NORTH CAROLINA vela}mox yr vvorznn nnvinnlny t en Iron rl!a .et In the eorrnetn metvfn e[ xc Illal.v.v ]1 1ual.rs.d w-lb ev�rJ a ut evnle ult.11.h t the .--tnne.euln 1 en° reeeneae 1 net, rl ee,rlen rsr ufrl .hence not U�rll ,ee me. 21' ve,t Hund uc ulv,uof )a a ereunn of 911.9e 11,t n city rl pn et he c 0l the rr eRrlr evnee by nlun.t cl 1 stet. 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Su01 lelon tote ens I..1, np e_ pill, et outs 0, , e•, St' t l0.}1 ...eft n Imo rll"rr thence eeuln JI Joy r<n ]0're .et 91.Y ]•we to nn Irma rll'.r thence .man }d rlept new IS' a net alne,rnlr . nlew el •. Ier rnn Pore. .mna , N.In.in dltnr et u:. ae.eetn Iq,nn, r1 of nyevoal l 1'--11 1 1 1-11 n,r nnnt }, re ne Iln Jletn°ce el 9)t.li I!!t ea n Itrn Plrnr 1]:en[e rth 6n dear <ee Ill w!H 8.50 D.et to rt be nart L•'l Hem --toll of Lot 1 of 'be rlae of .reef t w<L,lee, 1-c.] b,ne, e-utn ]s de <ee 19• I I.0 oeet to . Ile `t,, Um M1M<etern heir, t. 01 nrin 1 1 I'll rl°I not 61-1 ri.aet. neverllTdeln need oot »]. r,oe neI al.•nee . :ur II Jeyreee w• v<a ILIv Ie•a .Inns r tinter lr -n°n by u<nn t wen. to n Ire, tire, -1L+ n-ttrr......h ni trim r r,l4e "I nncd•nr st°tlnn rrnrett]I tlen °lonpt tlm eLl<ro <Iln< el Inn rr r, n.n .1 n.rJ or [letfnn ....... v , 11 dill. 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AA-tA Jay of Ul5 d5� 5 [an J Mfnuyy REPORT OF SUBSURFACE INVESTIGATION AND GEOTECHNICAL ENGINEERING SERVICES Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No. EC05-355G January 30, 3006 Prepared For: Elizabeth City State University AUG 11 2006 / 1. i"�I IJ �I sR) Solution's; iltici":if'tk`I1f Solutions::Inc'tr,` tz` January 30, 2006 TO: Elizabeth City State University 226 Dixon Hall Campus Box 749 Elizabeth City, NC 27909 Attn: Mrs. Randi Knofsky, AIA RE: Report of Subsurface Investigation and Geotechnical Engineering Services Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G Dear Mrs. Knofsky: In compliance with your instructions, we have completed our Geotechnical Engineering Services for the referenced project. The results of this study, together with our recommendations, are presented in this report. Often, because of design and construction details that occur on a project, questions arise concerning subsurface conditions. G E T Solutions, Inc. would be pleased to continue its role as Geotechnical Engineer during the project implementation. We trust that the information contained herein meets your immediate need, and we would ask that you call this office with any questions that you may have. Respectfully Submitted,. G E T Solutions, Inc. I �x"� 0Z Gerald W. Stalls Jr., E.I. Project Engineer Camille A. Kattan, P.E. Principal Engineer NC Reg. # 14103 c F Ssi SEAL 014103 ,_.. ...A...Yl> Copies: (3) Client (1) Millennium 3 Design Group: Attn: Mr. John Charles, AIA (1) Kaydos — Daniels Engineers, PLLC 504 East Elizabeth Street. Suite 2 • Elizabeth City, NC 27909 • Phone (252) 335-9765 • Fax (252) 335-9766 info CDgetsolutionsinacom Report of Subsurface Investigation and Geotechnical Engineering 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G EXECUTIVE SUMMARY The proposed construction at this site will consist of building a new 3-story dormitory structure as well as related site infrastructure. The project site is located along the north side of the existing 3-story dormitory within the Elizabeth City State University Campus in Elizabeth City, North Carolina. A brief description of the anticipated characteristics of the project is listed below: • First floor finish grade elevations anticipated to be approximately 1 tot 2- feet above the existing grade elevations. • Combination of light gauge metal (stud) walls and structural steel framing construction. • Shallow foundation and slab -on -grade design. • Maximum column and wall loads noted not to exceed 20 to 30 kips and 5 kips per linear foot, respectively. Our field exploration program included four (4) 40-foot deep SPT borings drilled within the limits of the proposed building location. A brief description of the subsurface soil conditions is noted below: RANGES OF AVERAGE STRATUM DESCRIPTION SPT I'I N- DEPTH (Feet) VALUES Borings: B-1 through B-4.' ` 0.5 to 0.67 Topsoil Topsoil 0.67 to 4 1 Silty Sandy CLAY (CL) 2 to 14 4 to 23 II SAND (SP, SP-SM, SM, SC) with varying W.O.H. (2) to 31 33 to 40t3I amounts of silt and clay CLAY (CL, CH) with varying amounts of sand W O.H.t�1 to 3 23 to 40 IIA and marine shell fragments Note (1) SPT = Standard Penetration Test, N-Values in Blows -per -foot Note (2) W.O.H. = Weight Of Hammer Note (3) SAND (SC) layer from 33 to 40-feet encountered at boring B-4 only. • Groundwater was encountered at a depth ranging from 4.5 to 5-feet below the current grade elevations at the boring locations. Report of Subsurface Investigation and Geotechnical Engineering 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G The following evaluations and recommendations were developed based on our field exploration and laboratory -testing program: • Field-testing program during construction to include foundation excavation observations and compaction testing of structural fill soils and existing subgrade soils. • An anticipated cut depth of at least 8-inches will be required to remove the existing organic materials, trees, low lying vegetation, and associated root mat from within the construction areas. Additionally, a cut depth of approximately 2 to 4-inches is anticipated to be required to remove the asphalt materials from within the building area that encroach on the existing roadway alignment. This should be substantiated during the subgrade preparation in the form of test pit excavations and proofroll evaluations. • In preparation for shallow foundation support, the footing excavations should extend into firm natural soil or well compacted structural fill. • Shallow foundations designed using an allowable bearing capacity of 2,500 psf (24-inch embedment, 24-inch width). • Estimated total and differential settlements less than 1-inch and 3/4-inch, respectively. • Seismic design should incorporate a site classification of Class E, as based on the results of the SPT borings and the requirements indicated in Table 1615.1.1 of the North Carolina State Building Code (2000 International Building Code with North Carolina Amendments). This summary briefly discusses some of the major topics mentioned in the attached report. Accordingly, this report should be read in its entirety to thoroughly evaluate the contents. TABLE OF CONTENTS EXECUTIVESUMMARY............................................................................................ i 1.0 PROJECT INFORMATION................................................................................... 1 1.1 Project Authorization............................................................................. 1 1.2 Project Description................................................................................ 1 1.3 Purpose and Scope of Services............................................................ 1 2.0 FIELD AND LABORATORY PROCEDURES....................................................... 2 2.1 Field Exploration.................................................................................... 2 2.2 Laboratory Testing................................................................................ 3 3.0 SITE AND SUBSURFACE CONDITIONS............................................................ 4 3.1 Site Location and Description................................................................ 4 3.2 Subsurface Soil Conditions................................................................... 5 3.3 Groundwater Information....................................................................... 5 4.0 EVALUATION AND RECOMMENDATIONS........................................................ 6 4.1 Clearing and Grading............................................................................ 6 4.2 Subgrade Preparation........................................................................... 8 4.3 Structural Fill and Placement................................................................ 8 4.4 Foundation Design Recommendations................................................. 9 4.5 Foundation Excavations...................................................................... 10 4.6 Foundation Settlements...................................................................... 11 4.7 Seismic Design Recommendations..................................................... 11 5.0 CONSTRUCTION CONSIDERATIONS.............................................................. 11 5.1 Drainage and Groundwater Concerns ................................................. 11 5.2 Excavations.........................................................................................12 6.0 REPORT LIMITATIONS..................................................................................... 12 APPENDIX I -BORING LOCATION SKETCH APPENDIX II - LOG OF BORINGS APPENDIX ill - SOIL BORING PROFILE Sokitiort"s Inc�`:;;��b Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G 1.0 PROJECT INFORMATION 1.1 Project Authorization: G ET Solutions, Inc. has completed our Geotechnical Engineering study for the proposed Dormitory project at the Elizabeth City State University Campus. The Geotechnical Engineering Services were conducted in general accordance with G E T Solutions, Inc. Proposal No. PEC05-192G, dated November 17, 2005. Verbal authorization to proceed with the services was received from Mrs. Randi Knofsky with Elizabeth City State University on November 8, 2005. 1.2 Project Description: The proposed development at this site is planned to consist of building a new three-story dormitory structure, a new entrance roadway and parking areas, as well as other associated pertinent infrastructure. The proposed structure will have a foot print area of approximately 25,000 square feet and will consist of a combination of structural steel and light gauge metal (stud) frame design supported by slab -on -grade and shallow foundation members. The proposed first floor finish elevation is anticipated to be approximately 1 to 2-feet above the existing site grade elevations. The maximum wall and column loading conditions associated with the structure were noted by Kaydos-Daniels to be on the order of about 5 kips per linear foot (klf) and 20 to 30 kips, respectively. If any of the noted information is incorrect or has changed, please inform G E T Solutions, Inc. so that we may amend the recommendations presented in this report, if appropriate. 1.3 Purpose and Scope of Services: The purpose of this study was to obtain information on the general subsurface conditions at the proposed project site. The subsurface conditions encountered were then evaluated with respect to the available project characteristics. In this regard, engineering assessments for the following items were formulated: General assessment of the soils revealed by the borings performed at the proposed development. General location and description of potentially deleterious material encountered in the borings that may interfere with construction progress or structure performance, including existing fills, surficial/subsurface organics, or expansive soils. Solutions, Inc;, _.;, Report of Subsurface Investigation and Geotechnical Engineering Services 1130/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: ECO5-355G 3. Soil subgrade preparation, including stripping, grading, and compaction, as well as providing Engineering criteria for placement and compaction of approved structural fill material, including weather and equipment effects. 4. Construction considerations for fill placement, subgrade preparation, and foundation excavations. 5. Feasibility of utilizing a shallow foundation system for support of the proposed building. Design parameters required for the foundation systems, including foundation sizes, allowable bearing pressures, foundation levels, and expected total and differential settlements. The scope of services did not include an environmental assessment for determining the presence or absence of wetlands or hazardous or toxic material in the soil, bedrock, surface water, groundwater or air, on or below or around this site. Any statements in this report or on the boring logs regarding odors, color, unusual or suspicious items or conditions are strictly for the information of the client. Prior to development of this site, an environmental assessment is advisable. 2.0 FIELD AND LABORATORY PROCEDURES 2.1 Field Exploration: In order to explore the general subsurface soil types and to aid in developing associated foundation design parameters, four (4) 40-foot deep Standard Penetration Test (SPT) borings (designated as B-1 through B-4) were drilled by G E T Solutions, Inc. within the approximate building foot print. The SPT boring was performed with the use of a power drill rig using mud (rotary wash) drilling procedures. The soil samples were obtained with a Split -Spoon Sampler in general accordance with the Standard Penetration Test (SPT) ASTM D-1586. These samples were taken continuously from the ground surface to a depth of 10 feet, and at 5-foot intervals thereafter. Solutlons;t Iric'?�;;�r Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G Table I — Boring Schedule Boring Boring Depth Bonng,L'ocatton Number B-1 40 East Wing; South End B-2 40 East Wing; Approximate Center B-3 40 North Wing; East End B-4 40 North Wing; West End The SPT boring location was established by representatives of Millennium 3 Design Group and identified in the field by G E T Solutions, Inc. The approximate boring location is shown on the "Boring Location Plan" attached to this report (Appendix I, Figure 1). This plan was developed based on the general site conceptual plan provided to G E T Solutions, Inc. by Millennium 3 Design Group. 2.2 Laboratory Testing: Representative portions of all soil samples collected during drilling were sealed in glass jars, labeled, and transferred to our Elizabeth City laboratory for classification and analysis. The soil classification was performed by a Geotechnical Engineer in accordance with ASTM D2488. A total of seven (7) representative split spoon soil samples were selected and subjected to natural moisture, 4200 sieve wash, and Atterberg Limits testing and analysis in order to corroborate the visual classification of the granular soils. These test results are tabulated on the following page and are also presented on the "Log of Boring" sheets (Appendix II). 3 Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G Table II - Laboratory Test Results Boring No. Sample No; Depth (Ft) Natural Moisture Content M , 4200 Sieve M LL/PL/PI (%) Classification B-1 S-2 2-4 34.1 62.7 NT CL B-2 S-1 0-2 13.0 72.5 NT CL B-3 S-3 4-6 22.6 5.1 NT SP-SM B-3 S-10 33-35 60.4 57.8 64/28/36 CH B-4 S-1 0-2 8.9 63.9 NT CL B-4 S-4 6-8 22.2 5.9 NT SP-SM B-4 S-10 1 33-35 43.0 1 33.0 NT SC NT=Not Tested 3.0 SITE AND SUBSURFACE CONDITIONS 3.1 Site Location and Description: The project site is located along the west side of the existing entrance roadway and dormitory within the Elizabeth City State University Campus located in Elizabeth City, North Carolina. At the time of our field investigation services, the property was generally observed to consist of a combination of a wooded area and a grass covered area. Additionally, isolated portions of the east building perimeter are anticipated to extend into the exiting pavement areas. The site appeared to be relatively level with less than 1-foot change in elevation in 50 feet. The westernmost site boundary consists of a wooded area followed by existing single and multiple story buildings the concrete sidewalk followed by an open grass covered area. The easternmost boundary consists of an existing asphalt paved roadway followed by an existing three-story dormitory. The northernmost boundary consists of single and multiple story structures. The southernmost boundary consists of a wooded area. Solutlons�ilric: ;,� �,K' Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G 3.2 Subsurface Soil Conditions: Topsoil ranging in thickness from approximately 6 to 8-inches was encountered at the boring locations. Beneath the surficial organic soils the underlying natural soils recovered at the boring locations were noted to be consistent to the explored depths at the boring location and were noted to be arranged in a two -layer configuration. The initial soil layerwas noted to extend from beneath the surficial organic soils to a depth ranging from 2 to 4-feet below existing grades. These soils were cohesive in nature and were noted to consist of Silty Sandy CLAY (CL). The Standard Penetration Test (SPT) results, N-values, recorded within this soil layer ranged from 2 to 14 blows -per -foot (BPF) indicating a very soft to stiff consistency. These soils The final soil layer extended from beneath the initial soil layer to the boring termination depths of 40 feet. These soils were primarily granular in nature and were noted to consist of SAND (SP, SP-SM, SM, SC) with varying amounts of silt and clay. The SPT results, N- values, recorded within this soil layer ranged from W.O.H. to 31 blows -per -foot (BPF) indicating a very loose to dense relative density. A deposit of very soft Silty CLAY (CH) with sand was encountered at the boring locations and extended from approximately 23-feet below existing grades to a depth ranging from approximately 33-feet to the boring termination depths of 40-feet. The subsurface description is of a generalized nature provided to highlight the major soil strata encountered. The records of the subsurface exploration included in Appendix II (Log of Boring sheets) and the Generalized Soil Profile presented in Appendix III should be reviewed for specific information as to individual borings. The stratifications shown on the records of the subsurface exploration represent the conditions only at the actual boring locations. Variations may occur and should be expected between boring locations. The stratifications represent the approximate boundary between subsurface materials and the transition may be gradual. 3.3 Groundwater Information: The groundwater table depth was measured at each boring location during drilling operations and was found to occur approximately 4.5 to 5 feet below the existing site grades. 5 Solution's,;Inc•:' '. %, Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G Groundwater conditions will vary with environmental variations and seasonal conditions, such as the frequency and magnitude of rainfall patterns, as well as man-made influences, such as existing swales, drainage ponds, underdrains, and areas of covered soil (paved parking lots, side walks, etc.). It is estimated normal seasonal high groundwater level will fluctuate within 1 to 1.5 feet above the current levels. We recommend that the contractor determine the actual groundwater levels at the time of the construction to determine groundwater impact on this project, if needed. 4.0 EVALUATION AND RECOMMENDATIONS In general, this site contained very soft to medium stiff CLAY (CL) followed by loose to dense SAND (SP, SP-SM, SM, SC). Accordingly, with minor foundation modifications, this site will be suitable for typical shallow foundation construction (footings). The minor foundation modifications may consist of undercut and backfill with suitable structural fill material in order to remove very soft cohesive bearing soils, as encountered at the location of boring B-3 (as indicated in section 4.5 of this report). The following recommendations are based on the previously discussed project information, our observations at the site, our interpretation of the field and laboratory data obtained during the exploration, and our experience with similar subsurface conditions. Subsurface conditions in unexplored locations may vary from those encountered at the specific boring locations. If the proposed construction scheme should vary from that previously described, we request the opportunity of reviewing our recommendations. 4.1 Clearing and Grading: The proposed construction areas should be cleared by means of removing existing trees, low-lying vegetation (grass), associated root mat, and topsoil. A cut depth of at least 8- inches is expected to be required to remove the surficial organic material. This cut is expected to be deeper in isolated areas to remove deeper deposits of organic soils, which may become evident during the clearing. Additionally, based on the site plan provided by Millennium 3 Design Group and our site observations, portions of the east building perimeter are anticipated to extend into the exiting pavement areas. Accordingly, where the building limits encroach on the existing paved areas, a cut depth of approximately 2 to 4-inches is anticipated to be required to remove the existing asphalt materials. This cut depth is estimated, as our field exploration services were not performed within the existing pavement areas. I Sol�onsllncr��°: Report of Subsurface Investigation and Geotechnical Engineering Services 1130/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G Following the removal of the existing asphalt materials, the existing Aggregate Base Course (ABC) materials, if encountered, are anticipated to be suitable to remain in -place for slab -on -grade and/or foundation support. This should be substantiated in the field during construction and the subgrade evaluation process as indicated in section 4.2 of this report. The subsurface soils recovered at the boring location typically contained appreciable amounts of fines. Also, based on the laboratory classification, the current (natural) moisture contents of the surface soils at the explored locations were estimated to be near their respective optimum moisture. Accordingly, combinations of excess surface moisture from precipitation ponding on the site and the construction traffic, including heavy compaction equipment, may create pumping and general deterioration of the bearing capabilities of the surface soils. Therefore, undercutting to remove very soft soils should be anticipated. The extent of the undercut will be determined in the field during construction, based on the outcome of the field-testing procedures (subgrade proofroll). In this regard, and in order to reduce undercutting, care should be exercised during the grading and construction operations at the site. Furthermore, inherently wet subgrade soils combined with potential poor site drainage make this site particularly susceptible to subgrade deterioration. Thus, grading should be performed during a dry season if at all possible. This should minimize these potential problems, although they may not be eliminated. The project's budget should include an allowance for subgrade improvements (undercut and backfill with select fill). Control of surface water is very important to the successful completion of the proposed construction. The contractor should plan his grading activities to control surface water and minimize erosion of exposed cut or fill material. This may include constructing temporary berms, ditches, flumes and/or slope drains to intercept runoff and discharge it in a controlled fashion, while complying with state and local regulations. The project's budget should include an allowance for subgrade improvements (undercut and backfill with select fill). It is recommended that the clearing operations extend laterally at least 5 feet beyond the perimeter of the proposed building area. 7 Sotutions,Ana: .- ' Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G 4.2 Subgrade Preparation: Following the clearing operation and prior to site grading or any fill placement, the subgrade soils within any slab -on -grade areas, including sidewalks, should be evaluated by G E T Solutions, Inc. for stability. Accordingly, the subgrade soils should be proofrolled to check for pockets of soft material hidden beneath a crust of better soil. Several passes should be made by a large rubber -tired roller or loaded dump truck over the construction areas, with the successive passes aligned perpendicularly. The number of passes will be determined in the field by the Geotechnical Engineer depending on the soils conditions. Any pumping and unstable areas observed during proofrolling (beyond the initial cut) should be undercut and/or stabilized at the directions of the Geotechnical Engineer. Following the proofroll operation a series of test pit excavations should be performed to verify that all organic soils and associated root mat have been removed from within the wooded and/or grass covered areas. Additionally, test pit excavations should be performed within the existing pavement areas to evaluate the existing ABC materials, if encountered, as well as the underlying soils. Following the approval by the engineer, it is recommended that, within the construction areas, natural soils below stripped grade should be compacted to a dry density of at least 100 percent of the Standard Proctor maximum dry density (ASTM D698), as tested to a depth of 12 inches. This densification will require the use of a large vibratory roller. 4.3 Structural Fill and Placement: Following the proper compaction and approval of the natural subgrade soils by the Geotechnical Engineer, the placement of the fill required to establish.the design grades may begin. Any material to be used for backfill or structural fill should be evaluated and tested by G E T Solutions, Inc. prior to placement to determine if they are suitable for the intended use. Suitable structural fill material should consist of sand or gravel containing less than 20 percent by weight of fines (SP, SM, SW, GP, GW), having a liquid limit less than 20 and plastic limit less than 6, and should be free of rubble, organics, clay, debris and other unsuitable material. s �Solu�oons,ljlncl Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G Based on our field and laboratory testing procedures, the on -site soils from an approximate depth of 6-inches to 4-feet consisted of CLAY (CL) or SAND (SM) with clay and do not appear suitable for re -use as structural fill. These soils can be used fill within green areas. Those granular soils (SAND; SP, SP-SM) encountered beneath the soil consisting of CLAY (CL) and/or SAND (SM) with clay do appear to be suitable for reuse as structural fill. In order to verify the acceptance or rejection of the existing soils for reuse as structural fill material further classification testing (natural moisture content, full sieve and Atterberg Limits) should be performed during construction. All structural fill should be compacted to a dry density of at least 100 percent of the Standard Proctor maximum dry density (ASTM D698). In general, the compaction should be accomplished by placing the fill in maximum 10-inch loose lifts and mechanically compacting each lift to at least the specified minimum dry density. A representative of G E T Solutions, Inc. should perform field density tests on each lift as necessary to assure that adequate compaction is achieved. Backfill material in utility trenches within the construction areas should consist of structural fill (as described above), and should be compacted to at least 100 percent of ASTM D698. This fill should be placed in 4 to 6 inch loose lifts when hand compaction equipment is used. 4.4 Foundation Design Recommendations: Provided that the previously recommended earthwork construction procedures are properly performed, the proposed dormitory can be supported by shallow foundations bearing over firm natural soil or well -compacted structural fill material. The footings can be designed using a net allowable soil pressure of up to 2500 pounds per square foot (psf). In using net pressures, the weight of the footings and backfill over the footings, including the weight of the floor slab, need not be considered. Hence, only loads applied at or above the finished floor need to be used for dimensioning the footings. However, the cohesive soils (CLAY, CL) encountered at the location of boring B-3 were noted to be very soft from a depth of approximately 2 to 4-feet below existing grades. Accordingly, foundation subgrade improvements in the form of undercut and backfill are considered necessary within this area. Additional recommendations regarding the foundation subgrade improvements are provided in section 4.5 of this report. E Solutloris;;tri¢:;:� t'w°� Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G In order to develop the recommended bearing capacity, the base of the footings should have an embedment of 24 inches beneath finished exterior grades, and wall footings should have a minimum width of 24 inches. In addition, isolated square column footings are recommended to be a minimum of 3 feet by 3 feet in area for bearing capacity consideration. The recommended 24-inch footing embedment is considered sufficient to provide adequate cover against frost penetration to the bearing soils. 4.5 Foundation Excavations: Immediately prior to reinforcing steel placement, it is suggested that the bearing surfaces of all footing and floor slab areas be compacted using hand operated mechanical tampers, to a dry density of at least 100% of the Standard Proctor maximum dry density (ASTM D 698) as tested to a depth of 12 inches, for bearing capacity considerations. In this manner, any localized areas, which have been loosened by excavation operations, should be adequately re -compacted. The compaction testing in the base of the footings may be waived by the Geotechnical Engineer, where firm bearing soils are observed during the footing inspections. In addition to compaction testing, hand auger borings with Dynamic Cone Penetrometer (DCP) testing should be performed within the base of the foundation excavations to ensure that the footing bearing soils are suitable for foundation support. As previously indicated, the shallow subsurface CLAY soils encountered at the location of boring B-3 were noted to be on the order of very soft. Accordingly, some foundation subgrade improvements may be required when these soils are encountered beneath the foundation excavations. This is anticipated to consist of undercutting to remove the very soft deposits and backfill within the use of suitable structural fill material as indicated in Section 4.3 of this report. The foundation subgrade improvements, should be further determined in the field during construction by a representative of G E T Solutions, Inc. in order to provide the allowable bearing capacities provided herein. Soils exposed in the bases of all satisfactory and remedied foundation excavations should be protected against any detrimental change in condition such as from physical disturbance, rain or frost. Surface run-off water should be drained away from the excavations and not be allowed to pond. If possible, all footing concrete should be placed the same day the excavation is made. If this is not possible, the footing excavations should be adequately protected. GET Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G 4.6 Foundation Settlements: It is estimated that, with proper site preparation (as previously presented), the maximum resulting total settlement of the proposed building foundations should be less than about 1 inch. The maximum differential settlement magnitude is expected to be less than 3/4-inch between adjacent footings (wall footings and column footings of widely varying loading conditions). The settlements were estimated on the basis of the results of the field penetration tests. Careful field control will contribute substantially towards minimizing the settlements. 4.7 Seismic Design Recommendations: It is noted that, in accordance with the NC Building Code; Chapter 16, this site would be classified as site Class E, based on which seismic designs should be incorporated. This recommendation is based on the limited data obtained from the 40-foot deep SPT borings (B-1 through B-4) and the requirements indicated in Table 1615.1.1 of the North Carolina State Building Code (2000 International Building Code with North Carolina Amendments), where a soft cohesive soil layer (CLAY) greater than 10-feet in thickness was encountered. Additionally, the CLAY layer was tested and found to contain a Plasticity Index greaterthan 20 and a water content greater than 40%. A CPT and soil shear wave velocity testing along with a dilatometer test (through the cohesive soil layer) may determine that a site Class D can be used, if needed. 5.0 CONSTRUCTION CONSIDERATIONS 5.1 Drainage and Groundwater Concerns: It is expected that dewatering may be required for excavations that extend deeper than about 4.5 to 5 feet (current groundwater level) below existing grades. Dewatering at these levels and just into the groundwater level could probably be accomplished by pumping from sumps. Dewatering at depths below the groundwater level may require well pointing. GET Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G 5.2 Excavations: In Federal Register, Volume 54, No. 209 (October, 1989), the United States Department of Labor, Occupational Safety and Health Administration (OSHA) amended its "Construction Standards for Excavations, 29 CFR, part 1926, Subpart P". This document was issued to better insure the safety of workmen entering trenches or excavations. It is mandated by this federal regulation that all excavations, whether they be utility trenches, basement excavation or footing excavations, be constructed in accordance with the new (OSHA) guidelines. It is our understanding that these regulations are being strictly enforced and if they are not closely followed, the owner and the contractor could be liable for substantial penalties. The contractor is solely responsible for designing and constructing stable, temporary excavations and should shore, slope, or bench the sides of the excavations as required to maintain stability of both the excavation sides and bottom. The contractor's responsible person, as defined in 29 CFR Part 1926, should evaluate the soil exposed in the excavations as part of the contractor's safety procedures. In no case should slope height, slope inclination, or excavation depth, including utility trench excavation depth, exceed those specified in local, state, and federal safety regulations. We are providing this information solely as a service to our client. G E T Solutions, Inc. is not assuming responsibility for construction site safety or the contractor's activities; such responsibility is not being implied and should not be inferred. 6.0 REPORT LIMITATIONS The recommendations submitted are based on the available soil information obtained by G E T Solutions, Inc. and the information supplied by the client and there associates for the proposed project. If there are any revisions to the plans for this project or if deviations from the subsurface conditions noted in this report are encountered during construction, G E T Solutions, Inc. should be notified immediately to determine if changes in the foundation recommendations are required. If G E T Solutions, Inc. is not retained to perform these functions, G E T Solutions, Inc. can not be responsible forthe impact of those conditions on the geotechnical recommendations for the project. The Geotechnical Engineer warrants that the findings, recommendations, specifications or professional advice contained herein have been made in accordance with generally accepted professional geotechnical engineering practices in the local area. No other warranties are implied or expressed. 12 Sbludoiu:lhc.��k Report of Subsurface Investigation and Geotechnical Engineering Services 1/30/06 Proposed Dormitory Elizabeth City State University Elizabeth City, North Carolina GET Project No: EC05-355G After the plans and specifications are more complete the Geotechnical Engineer should be provided the opportunity to review the final design plans and specifications to assure our engineering recommendations have been properly incorporated into the design documents, in order that the earthwork and foundation recommendations may be properly interpreted and implemented. At that time, it may be necessary to submit supplementary recommendations. This report has been prepared for the exclusive use of Elizabeth City State University as well as their consultants for the specific application to the proposed Dormitory project for The Elizabeth City State University complex located in Elizabeth City, North Carolina. 13 APPENDICES BORING LOCATION PLAN LOG OF BORINGS III. GENERALIZED SOIL PROFILE LEGEND — APPROXIMATE BORING LOCATIONS — LIMITS ❑F PROPOSED BUILDING EXISTING ROADWAY Project Project No., EC05-355G c. Ou tee 1/30/06 BORING LOCATION PLAN SCALE INA By, Gys No., 1 'al�'nv ental itions,Inc. LOG OF BORING No. B-1 PROJECT: Proposed Elizabeth Citv State University Dormiton' PROJECT NO.: EC05-355G CLIENT:Elizabeth City State UniversityPROJECT LOCATION: Elizabeth Citv. North Carolina LOCATION: See Attached Bovine Location Plan ELEVATION: INA DRILLER: J. Brown LOGGED BY: G. Stalls. E.I.T. DRILLING METHOD: Mud Rotan' (mash) DATE: 12-1-05 DEPTH TO - WATER> INITIAL: 8 5-feet AFTER 24 HOURS: : CAVING> -L p`. Description p o. m a o E z y o E ' m 0 oa u v 0 TEST RESULTS Plastic Limit Liquid Limit Water Content- • Penetration - 10 20 30 40 50 60 70 0 a s 7 6 e s 12 6 9 q 5 5 WOH woH WOH:.....:.....:......_.......:_...:._. wOH WOH WOH WOH WOH WOH WOH 2. 7-Inches Topsoil 0.5 Mottled Grav-Tan, moist, Silty Sandy CLAY (CL), stiff 4 Gray, moist, poorly graded fine to medium SAND (SP) to poorly graded fine to medium SAND (SP-SM) with silt, loose to medium dense Wet Prom 5-feet :r.( L r f ?'. {. 1: '.I:r r L :I 1:GC ii CC). 1 X. C'I: •I:I: I: 1 ! l X. C'1: 1:I; 1.. I; t.r ' ._..:._ : .. .:. . :.... .. ...:.....:.. _. • - .:. ..:.. .:_ :.....:_...:. .. .. _:.. ' .. _.... .................:.....:.....:.....:..... -. :.....: ....:......:. ... i.....:.....:... _....:.....:.....: .... :..... :..... :.....:._.. ....: .... .: .. J..... :.... :.....:, ....:.. ... ...:.....: :.....:. ..:..... b. .:. - - - 1, 3 6 le 24 23 Gray, wet, Silty CLAY (CH) with trace sand and marine shell fragments, very soft 8 9 30 0 36 11 Boring terminated at 40 ft. P14, 0. 1. = Weight Of Hammer Fiqure PAGE 1 of 1 :::.. eon-Dical Env' -"mental T Li C. lions, lnc. LOG OF BORING No. B-2 PROJECT: Proposed Elizabeth Citv State Universitv Dormiton PROJECT NO.: EC05-355G CLIENT: Elizabeth Citv State University PROJECT LOCATION: Elizabeth Citv. North Carolina LOCATION: See Attached Boring Location Plan ELEVATION: INA DRILLER: J. Broum LOGGED BY: G. Stalls. E.I.T. DRILLING METHOD: Mud Rotary (wash) DATE: 12-1-05 DEPTH TO - WATER> INITIAL: $ 5-feet AFTER 24 HOURS: -7 CAVING> L L o w Description r T O a Z m 3 c m u o "' v o TEST RESULTS Plastic Limit �-—� Liquid Limit Water Content- • Penetration - 10 20 30 40 50 60 70 0 s 6 96 6 s 9 10 12 5 7 6 e s 1 WOH.....:.....: WOH WOH WOH WoH WOH WOH WOH 2 6-Inches Topsoil ....... ....._. ...-._...._...... . .. .... .:.. .. [.....:. .. :..... :. ..:...... :.. ...:..... :..... :.....:..... ..:... :.....:.....:.....:..... ...................... _...... ............ .. .... - .....:..... .:..... 1.....-. ......... : .....: ... ..:.... :.... :.. ..:. ..:..... ' ..:.....:..... .:..... 1.. ...:. ....:..... ..._... ....:... .: ....:........... :.....:. . .. :..... .: :.. .:......:.....:. I. .t ...:.. .:..... ......:.....:.... Mottled Gray -Tan, moist, Silty Sandy CLAY (C4dense ..27 Reddish Tan, moist, Silty fine SAND (SM) with clay, L... 'L7:tJ. a: r r I: F ..... 1: I y; I;1 .... 1.I. } 3 Gray, moist, poorly gaded fine to medium SAND (S'I: it graded fine to medium SAND (SP-SM) with silt, loos.. dense Wet from 5-feet 4 5 6 16 Gray, wet, Silty fine SAND (SM), medium dense 23 Gray, wet, Silty CLAY (CH) with trace sand and marine shell fragments, very soft ..... 7 24 8 9 30 10 36 11 Boring terminated at 40 ft. az....:._ W0.11. = 4NeigllrOfHammei Fiqure PAGE 1 of 1 PROJECT: Proposed Elizabeth City State University Donnitore PROJECT NO.: EC05-355G eon` cal E..x.. n�v+ mental CLIENT: Elizabeth Citv State University PROJECT LOCATION: Elizabeth Citv. North Carolina [ions, Inc. LOCATION: See Attached Borintt Location Plan ELEVATION: INA LOG OF BORING DRILLER: J. BroHm LOGGED BY: G. Stalls. E.I.T. DRILLING METHOD: Mud Rotary (wash) DATE: 12-1-05 No. B-3 DEPTH TO - WATER> INITIAL: a 4.5-feet AFTER 24 HOURS: = CAVING> f w N oo TEST RESULTS Plastic Limit Liquid Limit v Description = a z 3 m o ar aai p� in Water Content- • 0 Penetration - 10 20 30 40 50 60 70 0 2 3 8-Inches Topsoil 0.6 .: ....:.....:_....=. ...:..... :. ....:..... 1 Mottled Gray -Tan, moist, Silty Sandy CLAY (CL), very soft to 2 medium stiff 4 .1 tl.tt 5.1� graded fine to medium SAND SP to poorly ' Gray, moist, poorly S ( ) P Y ""' 6 :._..:. _..:..... g e 6 graded fine to medium SAND (SP-SM) with silt, medium dense to -a:I: r L 1 11 dense L:CrJ. 14 �. Wet from 45-feet .ul: r. r ii' 4 13 1s .......... _............... ........... . . . t:.....:.....� :.....:..... 5 .1:1; a:cr 4:Gi 4i ..... 14 16 1s .....:.... u .: .....: .....� _..... .:.....:... _:..... 12 5 1 'LYrI. 6 s ....f :.....:... :....:....:.....:... 1e rrr.1 Gray, wet, Silty fine SAND (SM), loose ..... ..... 4 e .._............._....................... ... 7 ..... 4 1 1. .. _.. .....- ... 23 24 Gray, wet, Silty CLAY (CH) with trace sand and marine shell fragments, very soft 1 WOH 1 ....:... _:..... 1 .... .:..... it _f._..:.... J_....:..... :. ,.. .:. . .. :... 6 9 WOH 30 WOH WOH _... :.. ..'. .....:. ....:......... .. .. .. :... 10 WOH 37.fr WOH .....:.....:...... .. . :.. ... :... ..:. ..:..... 36 1 _....:.....:.....:. ....:.. ....:.....:. ....:... _ J .....f ....... ............... ..... 38.5 Gray, wet, Silty CLAY (CL) with sand and trace marine shell 11 2 fragments, very soft .....:....:....:......:......:.....:.....:.... Boring tenninated at 40 ft. 42 W O.H. = Weight Of Hammer Figure PAGE 1 of 1 %="'-�', Env mental tiom, Inc. LOG OF BORING No. B-4 PROJECT: Proposed Elizabeth City State University Dormiton, PROJECT NO.: EC05-355G CLIENT: Elizabeth City State University PROJECT LOCATION: Elizabeth City. North Carolina LOCATION: See Attached Borine Location Plan ELEVATION: INA DRILLER: J. Brown LOGGED BY: G. Stalls. E.I.T. DRILLING METHOD: Mud Rotary (wash) DATE: 12-1-05 DEPTH TO - WATER> INITIAL: $ 5-feet AFTER 24 HOURS: CAVING> f o Description 9 m Z m m 0 oo y e TEST RESULTS Liquid Limit WatercContent - 0 Penetration - 10 20 30 40 50 60 70 e 6 6 6 6 7 9 12 „ 13 11 r a woH won WOH 3 ss12 3 8-Inches Topsoil 0.6 i :r. i.'I: y ll:Lr I:IF1 1 11:L( r L1 nl L'I: ._.._.. .. t .... ..-..._..... _.. ... ............................................ .. .: ... .....:......:..... 1.. _ .1, ....:... .. -� . .:....:... .I:__ ..:.....:..... :. ....:..... :....:.... __...:..... :..... :._..:... .. ...is I ....._. .......I. _....... .................. ' I T I I ...:.....:.....:.....I'.... ..........:.....:..... �:..... :..... :.... .:... . I i ...... .._.. ....... ..... ..... ................. .. .. - - 1 Mottled Gray -Tan, moist, Silty Sandy CLAY (CL), stiff Gray, wet, poorly graded fine to medium SAND (SP) to poorly graded fine to medium SAND (SP-SM) with silt, medium dense 2 Gray, wet, Silty CLAY (CH) with trace sand, very soft mixed with marine shell fragments from 22 to 28-feet Trace marine shell fragments from 28-feet 33.5 3 6 4 5 12 7 24 g g 30 Gray, wet, Clayey SAND (SC) with silt, very loose ... 10 WOH WOH WOH.... i t k36 Boring tenninated at 40 ft. 42 W 0.1-1. = Weight Of ]1(1111111 eP Fiqure PAGE 1 of 1 Symbol Description Strata symbols Topsoil Low plasticity clay Poorly graded sand with silt High plasticity V� clay Silty sand Clayey sand Misc. Symbols 4 Water table during II drilling Notes: 1. Exploratory borings were drilled on 12-1-05 using a 4-inch diameter continuous flight power auger. 2. No free water was encountered at the time of drilling or when re -checked the following day. 3. Boring locations were taped from existing features and elevations extrapolated from the final design schematic plan. 4. These logs are subject to the limitations, conclusions, and recommendations in this report. 5. Results of tests conducted on samples recovered are reported on the loos. I a J J J J J 4 fi S fi NM=13.p 2 3 6 6 NM=89 ] ] 3 5 - NM=34.1 67 2 1 6 5 68 M 8 ] 1 ] UNM=225 9 11 619 '19'h1 139 'L;I,fJ. 819I :I.0 1, .. 9 .1 :I. L I' 1 14 13 12 13 NM=22 2 6 5 'I.I;V1 y9 '1ttj 5 'I :I:M1 15 !-0Fht 11 6 ... s —IT r.l'.l l: I 6 10 f.11l t: 1415 " 1213 .I;GI LI 6 5 9 A:hi 4! 12 A:1 C41 15 11 "L 7: r.1 .1... i d Cii :I :ffi l ...Ci f .f. C 'I: 1 .I'. C I. 57 1 .I'. L I.t '.1. L f 1 ] 10 I(11.1 4 5 5 i.l.L}1 s {q'V.}i ] tj.Li l 9 L7 f.l. 'LT CJ. J 11'r.l 16 . 1 1 t. l :I ;LII 1 .Illl:l 66 ] fi 46 :I lI.Li e9 ' S s < �r�rrr' 6 IItr1 nN 24 oa WOH WOH 1 WOM WOH WOH WON WOH WOH WOH WOH WOH WOH WOH WOH 2 32 — WOH WOH WOH NM=604 WOH NM=4]0 _ _ WOH WOH WOH LL=64 WOH WOH WOH WOH WOH Wip 2 WOH WOH 1 I 40 Iral symbols Topsoil �® Low plasticity clay Poorly graded sand with Sill plasticity zHigh clay Silty sand 0 Clayey sand GET Solutions, Inc. GENERALIZED SOIL PROFILE State Un PROJECT NO. EC05-355G DRAWN U Symbol Description Strata symbols Topsoil Low plasticity clay Poorly graded sand with silt High plasticity clay Silty sand Clayey sand Misc. Symbols Water table during drilling Notes- 1. Exploratory borings were drilled on 12-1-05 using a 4-inch diameter continuous flight power auger. 2. No free water was encountered at the time of drilling or when re -checked the following day. 3. Boring locations were taped from existing features and elevations extrapolated from the final design schematic plan. 4. These logs are subject to the limitations, conclusions, and j recommendations in this report. 5. Results of tests conducted on samples recovered are reported on the loqs.