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Home My WebLink AboutWPO201400024 Correspondence 2014-08-22 PROJECT T MANAGEMENT ENGINEERING LAND PLANNING ENGINEERING August 22, 2014 Mr. Glenn Brooks, P.E. Albemarle County Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: RE: Out of Bounds WPO2014-24 Dear Glenn, We have included 2 copies of the Erosion Plan for Out of Bounds. A• • neering, P.C. Justin Shimp, P.E. 1 SHIMP PROJECT MANAGEMENT CIVIL ENGINEERING LAND PLANNING ENGINEERING 'a),' August 6, 2014 Mr. Glenn Brooks, P.E. Albemarle County Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: RE: Out of Bounds SDP201400036 Dear Glenn, Thank you for your review of the Site Plan application for Out of Bounds. We have revised the plans per comments dated July 24, 2014. Please find below detailed comment responses describing the changes made to the plan for each of your comments that we have addressed. A. 1. We are working with VDOT to obtain their approval and will forward that as soon as it is received. 2. Town Mews has been updated per our discussions to include a 3' concrete section instead of the CG-9D and ribbon curb. B. 1. A road plan has been included with this submittal. C. 1. A SWPPP and PPP will be sent to you as a separate letter. D. 1. The berm has been clarified. The berm has been shown as a 4 foot hatched area on the plan and a detail of the berm has been included with the underground detention detail on Sheet C18. Please let us know if you have any additional questions about the revisions. Best Regards, Shimp Engineering, P.C. Justin Shimp, P.E. 1 Todd Shifflett From: Vito Cetta [vitocetta @mac.com] Sent: Friday, July 18, 2014 8:02 AM To: Todd Shifflett Subject: Re: Out of Bounds Attachments: AlbemarleCounty_VSMP_letter_8July2014.pdf Thanks Todd, We took care of this yesterday. Vito On Jul 17, 2014, at 10:27 AM, Todd Shifflett<tshifflett(albemarle.org>wrote: Good Morning Vito, I have received your resubmission application. Judy and Danielle said that you have paid the fee to the state. In order to not have to pay us the fee,we will need proof that you did pay them. I have attached a letter from Glenn Brooks that can explain in a little more detail. Thanks, Todd Todd Shifflett Intake/Support Specialist II Community Development 401 McIntire Road,North Wing Charlottesville,Virginia 22902 Phone-(434)296-5832 ext.4504 Fax-(434)972-4126 Email: tshifflettaalbemarle.org Vito Cetta, aia 1730 Owensfield Dr Charlottesville, VA 22901 home: 434-296-0003 cell: 434-531-2192 vitocettac mac.com 1 PROJECT CIVIL MANAGEMENT ENGINEERING LAND PLANNING ENGINEERING Y July 22, 2014 Albemarle County Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: RE: Out of Bounds WPO2014-24 This letter addresses the Stormwater Pollution Prevention Plan for Out of Bounds that satisfies the requirements of section 17-405 of the Albemarle county code. Registration Statement: A signed registration statement has been provided. Notice of General Permit Coverage: A copy of the notice of coverage will be provided upon receipt. General Permit: A copy of the general permit will be provided. Nature of Activity: The nature of this activity is a medium density residential development. Plan of the Site: A plan and a stormwater report have been provided with this submittal addressing the direction of stormwater flow, limits of land disturbance, major structural and nonstructural control measures, surface waters, concentrated stormwater, and support activities. Requirements of 40 CFR 450.21: A plan and a stormwater report have been provided with this submittal addressing the runoff volume and velocity, stormwater discharges, soil exposure, disturbance of steep slopes, sediment discharges, buffers, soil compaction, disturbed areas, and outlet structures. Qualified Personnel: Pete Wildman (434) 531-6557, Responsible Land Disturber 1 SHIMP PROJECT MANAGEMENT CIVIL ENGINEERING LAND PLANNING ENGINEERING July 22, 2014 Albemarle County Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: RE: Out of Bounds WPO2014-24 This letter addresses the Pollution Prevention Plan for Out of Bounds that satisfies the requirements of section 17-404 of the Albemarle county code. Source of Pollutants: The source of pollutants for this project are petroleum based products associated with excavation; grease, fuel, oil, etc. Location of Pollutant generating activities: Contractor will be operating throughout the site, fueling will be limited to the staging area as shown on the plans. Non Stormwater Discharges: Fire hydrant flushings; Waters used to wash vehicles or equipment where soaps, solvents, or detergents have not been used and the wash water has been filtered, settled, or similarly treated prior to discharge;Water used to control dust that has been filtered, settled, or similarly treated prior to discharge; Potable water sources, including uncontaminated waterline flushings; Foundation or footing drains where flows are not contaminated with process materials such as solvents; Uncontaminated excavation dewatering, including dewatering of trenches and excavations that have been filtered, settled, or similarly treated prior to discharge; and Landscape irrigation. Person Responsible: Pete Wildman (434) 531-6557 Practices and Procedures: All fueling and construction materials will be stored in the designated staging areas and will be covered to keep rain water from washing materials away. Materials shall be stored in a location up gradient of a sediment trapping measure and located in an area away from storm water conveyance channels and inlets. In case of a spill this would keep the contaminent in a condition of overland flow which would allow the spill to be more easily contained. In case of a spill the contaminant shall be contained as well as possible using such measures as a spill berm, absorbent product, or other spill containing measure and the person responsible shall be notified immediately. All contaminant collection material shall be disposed of properly in a manner to prevent contact with stormwater. All wash water shall be directed toward sediment traps or sediment basins using filtration devices such as filter bags or sand filters or a similar effective control. All concrete wash water shall be directed into a leak proof container that shall be designed so that no overflows can occur due to inadequate sizing or precipitation. All hardened concrete waste shall be removed and disposed of in a manner consistent with the handling of other 1 �.r construction wastes. Liquid concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wash waters and shall not be discharged to surface waters. Pollution Prevention Awareness: This document will be provided to the contractor who will be responsible for informing all workers on the site of the Pollution Prevention Plan. 2 SHIMP PROJECT MANAGEMENT CIVIL ENGINEERING LAND PLANNING July 11, 2014 Ms. Michelle Roberge Albemarle County Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: RE: Out of Bounds WPO2014.24 Dear Michelle, We have changed the plan per the owners request to now include 8 townhome units in place of the 8 multifamily units in Block 3. We have adjusted the lots and utilities accordingly. The update has increased the impervious area of the site by 274 SF draining into the North Side BMP#1. We have included an exhibit showing the old and new layouts with the added impervious area. We do not believe it is necessary to redo all calculations for BMP#1 based on this slight increase in impervious area due to the fact that our calculations do not reflect the portions of the pipe along the ends that connect one pipe to another, a total of 8'of pipe whose storage is not accounted for in the calculations. We believe this 8' of pipe would be significantly more than sufficient for the small added impervious area. Please let us know if you have any additional questions about this. Best :.rer-_i Shi •. ngineering, P.C. .•stin Shimp, P.E. 1 SHIM PROJECT AE CIVIL MAN ENGINEERING GEMNT LAND PLANNING July 2, 2014 Ms. Michelle Roberge Albemarle County Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: RE: Out of Bounds SDP201400036 Dear Michelle, Thank you for your review of the Site Plan application for Out of Bounds. We have revised the plans per comments dated June 20, 2014. Please find below detailed comment responses describing the changes made to the plan for each of your comments that we have addressed. We have updated Town Mews to include CG-9D for each driveway as well as a 1' ribbon curb. The CG-9D is intended to be at a shallow slope of about 5% to stay with the grading designed for each unit. The curb around each driveway on Town Mews has been updated so that the curb ends at the back of the CG-9D. The CG-9D has been altered for lots 25 and 38 as shown. Please let us know if you have any additional questions about the revisions. Shimp • -- ng, P.C. J : in Shimp, P.E. 1 v I �� v z Wi I / L, / X R • / - x II .;__ a „,441, , ,, , I r 1 .� r \ �; eEt ( .. 1 x I "I/ Ii / J / Up• I ��_J : •' M JE I ern ' Q. ^-4 a, 1 cf. X . . L � / X ,; .C3 / / W X z cry ,ittr 9° � ;1 �/ :' �w Q X / } . w n • X / X r • I I I X / �I . .. . . �l) X I, , i owsiosti.----r 09 ', . , ,..i.,..,---je //(/ ' \\ x /I I , , _ , , . 1 ( a •• a: / � 4 / X 1 - - •qt. / fie. / I? �1 / P. 'n /.4 M pill _ . I X • 73-' a... . . iii A 111'11111: I , • • • ' p / �• _-- - \ / N * / �► / w 1 / � zz / o w X / ..., .,,,, . .,., r- / *- I- ccr _ rn / , . , ,,,-:, .,,,,,,,,,..,,,,,,,, ,...,., . .,;..4•:!..ki:!•.,'-+'•?.--..___......... , SHIMP PROJECT MANAGEMENT CIVIL ENGINEERING LAND PLANNING ENGINEERING ..__-, July 2, 2014 Ms. Michelle Roberge Albemarle County Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: RE: Out of Bounds WPO2014.24 Dear Michelle, Thank you for your review of the WPO application for Out of Bounds. We have revised the plans per comments dated June 20, 2014. Please find below detailed comment responses describing the changes made to the plan for each of your comments that we have addressed. 6. Inlet protection has been provided for the grate inlet before ST-30 as well as inlet ST-36, this can be seen on Sheet C21. 10. The berm behind the lots along the southern property line has been extended from lots 30 to 35. Lots 36- 38 have a ditch behind that will capture the flow from the houses and convey it into the underground detention system through inlet ST-34, a berm is specified behind inlet ST-34. Lots 26-30 also have been graded with a ditch behind that will convey the flow from the units to the underground detention system through inlet ST-20. This system of ditches and berms should be sufficient to capture runoff from the proposed lots to keep it from flowing to the neighboring properties. 11. The southern detention basin has been increased from 180' to 190' as requested. 18. We will provide the manufacturers approval of the underground detention facilities in a separate letter when it is available. 19. Detail 1 on Sheet C18 has been updated to correctly reflect the actual spacing between each BMP, with the northern BMP#1 having a 4' spacing and the southern BMP#2 having a 3' spacing. Please let us know if you have any additional questions about the revisions. Bes -e•:Ids, o Shims gineering, P.C. J: in Shimp, P.E. 1 SHIMP PROJECT MANAGEMENT CIVIL ENGINEERING LAND PLANNING EIN RIN July 2, 2014 Mr. Troy Austin, PE Area Land Use Engineer VDOT 1601 Orange Road Culpeper, VA 22701 Regarding: RE: Out of Bounds Comment Response Dear Troy, We have revised our plans per your most recent comments data June 30, 2014. 1. As we discussed the street trees will not grow to full size in the landscape strip, we recommend you speak with Ellie or Megan at the county for more details. 2. The aggregate size for Bennington Road has been updated to 6"as requested. All subdivision and secondary Roads now have a minimum depth of 6". Updated pavement calculations have been provided. 3. We have updated the Bennington Road pavement section from station 10+00 to 12+13 to match Georgetown Road as discussed, adding 2"of aggregate. The AADT of 842 for Georgetown Road was the value we received from our correspondence with you when you requested that we use 617+ 225, or 842, instead of the 617 that we had been using. Your reasoning for this was to add the trips out of our site (617) to the trips coming through Bennington (225). If an AADT of 842 is placed in the equation DR=3.48Ln (AADT)-1.48Ln (SSV) -7.23, with an SSV of 5 a Dr value of 13.8 is calculated. The Dp for this pavement section is 14.325, providing an over design of this pavement section. 4. We will address those issues with traffic as soon as they are available. Storm Sewer Calculations 1. We have provided a table of the breakdown of"C"values. Because many were actually over estimated we have rerun all our pipe and inlet calculations and updated the inlet drainage area maps to reflect the new values. 2. We have rerun all pipe calculations to make sure a value of.013 was used for mannings "n"values of each pipe section. The storm sewer between ST-29 and ST-30 still remains surcharged. 3. All storm sewers have been calculated using a roughness coefficient of.013 for the HDPE pipes. 4. HGL calculations have been updated. Though the roughness coefficients were updated to .013, because the"c"values were also updated and mostly decreased the water elevation in structure 29 is actually lowered from previous calculations. 5. HGL calculations have been provided for structures that have pressurized flow. Open channel flow has been proven for all other structures, therefore HGL calculations are not provided for these structures. 1 Please let us know if you have any additional questions. ,� Be! '-�. •s,• Shin' • Engineering, P.C. J•stin Shimp, P.E. 2 Appendix IV Flexible Pavement Design Worksheet for New Subdivision Streets This sheet is intended for use and submission in conjunction with VDOT's Secondary Street Acceptance Requirements County Albemarle County 'Date: 7/2/2014 Subdivision Out of Bounds Street Name Georgetown Road Design Engineer (Phone: AADT Projected traffic for the street segment considered,as defined in the Subdivision Street Requirements. CBRD Design CBR=Average of CBRT x 213 and modified only as discussed in the Pavement Design Guide. CBRT CBR value of the subgrade sample,taken and tested as specified in the Pavement Design Guide DME VDOT District Materials Engineer EPT Equivalent projected traffic HCV Number of Heavy Commercial Vehicles(e.g.trucks,buses,etc.,with 2 or more axles and 6 or more tires). %HCV Percentage of the total traffic volume composed of Heavy Commercial Vehicles. RF Resiliency Factor=Relative value of the subgrade soil's ability to withstand repeated loading. SSV Soil support value of subgrade(SSV=CBRD x RF) Dp Thickness index of proposed pavement design computed by the Conventional Pavement Design Method DR Thickness index required,based on Design AADT and SSV,determined by Appendix II. Step 1• Determine Design AADT Step 2: Determine Design Values • CBR,RF,and SSV AADT 842 Sample No. CBRT Resiliency Factor (RF) %HCV= 100(HCV/ AADT) 1 7.5 Source Value or 0.0% 2 Table 1 2 EPT=20 x HCV Note: For 3 Appendix I 1.0 Note: For%HCV<5%,use AADT %HCV>5%, DME approved RF EPT>AADT For preliminary designs,use the lowest RF value in the equation Design AADT = Use greater of AADT or EPT 842 CBRD x RF SSV (5.0) x ( 1.0) = 5.0 Step 3: Pavement Design (Check appropriate box and show proposed pavement design below.) ❑ (A) Limited to Design AADT 5 400-Show pavement material notations and thickness from Appendix IV Tables A and B. J (B)Show pavement section as developed inthe Pavement Design Guide. DR= 13.8 (See Appendix III for material notations and thickness equivalency values(a)). from Appendix II Description of Proposed Pavement Section Material Notation Thickness,h a (a x h) Surface 1.5" SM 9.5A Superpave 1.5 2.25 3.375 Intermediate 0 Base 3"Asphalt Concrete Base 3 2.25 6.75 Subbase 5"VDOT#21A 7 0.6 4.2 DP must equal or exceed the value of DR. DP=E(a x h)= 14.325 Appendix IV Flexible Pavement Design Worksheet for New Subdivision Streets This sheet is intended for use and submission in conjunction with VDOT's Secondary Street Acceptance Requirements County Albemarle County 'Date: 7/2/2014 Subdivision Out of Bounds Street Name Road"A" Design Engineer IPhone: AADT Projected traffic for the street segment considered,as defined in the Subdivision Street Requirements. CBRD Design CBR=Average of CBRT x 213 and modified only as discussed in the Pavement Design Guide. CBRT CBR value of the subgrade sample,taken and tested as specified in the Pavement Design Guide DME VDOT District Materials Engineer EPT Equivalent projected traffic HCV Number of Heavy Commercial Vehicles(e.g.trucks,buses,etc.,with 2 or more axles and 6 or more tires). %HCV Percentage of the total traffic volume composed of Heavy Commercial Vehicles. RF Resiliency Factor=Relative value of the subgrade soil's ability to withstand repeated loading. SSV Soil support value of subgrade(SSV=CBRD x RF) Dp Thickness index of proposed pavement design computed by the Conventional Pavement Design Method DR Thickness index required,based on Design AADT and SSV,determined by Appendix II. Step 1: Determine Design AADT Step 2: Determine Design Values CBR,RF, and SSV AADT 267 Sample No. CBRT Resiliency Factor (RF) %HCV= 100(HCV/ AADT) 1 7.5 Source Value or 0.0% 2 Table 1 2 EPT=20 x HCV Note: For 3 Appendix I 1.0 Note: For%HCV<5%,use AADT %HCV>5%, DME approved RF EPT>AADT For preliminary designs,use the lowest RF value in the equation Design AADT Use greater of AADT or EPT 267 CBRD x RF SSV (5.0) x ( 1.0) = 5.0 Step 3:Pavement Design (Check appropriate box and show proposed pavement design below.) ❑ (A) Limited to Design AADT<_400-Show pavement material notations and thickness from Appendix IV Tables A and B. J (B)Show pavement section as developed inthe Pavement Design Guide. DR= 9.8 (See Appendix III for material notations and thickness equivalency values(a)). from Appendix II Description of Proposed Pavement Section Material Notation Thickness,h a (a x h) Surface SM 9.5A Superpave 1.5 1.67 2.505 Intermediate 0 Base BM25.0A 2.5 1.67 4.175 Subbase VDOT#21A _ 6 0.6 3.6 DP must equal or exceed the value of DR. DP=E(a x h)= 10.28 Appendix IV Flexible Pavement Design Worksheet for New Subdivision Streets This sheet is intended for use and submission in conjunction with VDOT's Secondary Street Acceptance Requirements County Albemarle County (Date: 7/2/2014 Subdivision Out of Bounds Street Name Bennington Road Station 10+00 through 12+13 Design Engineer 'Phone: AADT Projected traffic for the street segment considered,as defined in the Subdivision Street Requirements. CBRD Design CBR=Average of CBRT x 213 and modified only as discussed in the Pavement Design Guide. CBRT CBR value of the subgrade sample,taken and tested as specified in the Pavement Design Guide DME VDOT District Materials Engineer EPT Equivalent projected traffic HCV Number of Heavy Commercial Vehicles(e.g.trucks,buses,etc.,with 2 or more axles and 6 or more tires). %HCV Percentage of the total traffic volume composed of Heavy Commercial Vehicles. RF Resiliency Factor=Relative value of the subgrade soil's ability to withstand repeated loading. SSV Soil support value of subgrade(SSV=CBRD x RF) Dp Thickness index of proposed pavement design computed by the Conventional Pavement Design Method DR Thickness index required,based on Design AADT and SSV,determined by Appendix II. Step 1: Determine Design AADT Step 2: Determine Design Values CBR,RF, and SSV AADT 225 Sample No. CBRT Resiliency Factor (RF) %HCV= 100(HCV/ AADT) 1 7.5 Source Value or 0.0% 2 Table 1 2 EPT=20 x HCV Note: For 3 Appendix I 1.0 Note: For%HCV<5%,use AADT %HCV>5%, DME approved RF EPT>AADT For preliminary designs,use the lowest RF value in the equation Design AADT Use greater of AADT or EPT 225 CBRD x RF SSV (5.0) x ( 1.0) = 5.0 Step 3: Pavement Design (Check appropriate box and show proposed pavement design below.) ❑ (A) Limited to Design AADT 5 400-Show pavement material notations and thickness from Appendix IV Tables A and B. J (B)Show pavement section as developed inthe Pavement Design Guide. DR= 9.2 (See Appendix III for material notations and thickness equivalency values(a)). from Appendix II Description of Proposed Pavement Section Material Notation Thickness,h a (a x h) Surface SM 9.5A Superpave 1.5 1.67 2.505 Intermediate 0 Base BM25.0A 3 1.67 5.01 Subbase VDOT#21A 7 0.6 _4.2 DP must equal or exceed the value of DR. DP=E(a x h)= 11.715 Appendix IV Flexible Pavement Design Worksheet for New Subdivision Streets This sheet is intended for use and submission in conjunction with VDOT's Secondary Street Acceptance Requirements County Albemarle County (Date: 7/2/2014 Subdivision Out of Bounds Street Name Bennington Road Station 12+13 Through 15+68 Design Engineer 'Phone: AADT Projected traffic for the street segment considered,as defined in the Subdivision Street Requirements. CBRD Design CBR=Average of CBRT x 213 and modified only as discussed in the Pavement Design Guide. CBRT CBR value of the subgrade sample,taken and tested as specified in the Pavement Design Guide DME VDOT District Materials Engineer EPT Equivalent projected traffic HCV Number of Heavy Commercial Vehicles(e.g.trucks,buses,etc.,with 2 or more axles and 6 or more tires). %HCV Percentage of the total traffic volume composed of Heavy Commercial Vehicles. RF Resiliency Factor=Relative value of the subgrade soil's ability to withstand repeated loading. SSV Soil support value of subgrade(SSV=CBRD x RF) Dp Thickness index of proposed pavement design computed by the Conventional Pavement Design Method DR Thickness index required,based on Design AADT and SSV,determined by Appendix II. Step 1• Determine Design AADT Step 2: Determine Design Values • CBR,RF, and SSV AADT 143 Sample No. CBRT Resiliency Factor (RF) %HCV= 100(HCV/ AADT) 1 7.5 Source Value or 0.0% 2 Table 1 2 EPT=20 x HCV Note: For 3 Appendix I 1.0 Note: For%HCV<5%,use AADT %HCV>5%, DME approved RF EPT>AADT For preliminary designs,use the lowest RF value in the equation Design AADT _ Use greater of AADT or EPT 143 CBRD x RF — SSV (5.0) x ( 1.0) = 5.0 Step 3: Pavement Design (Check appropriate box and show proposed pavement design below.) ❑ (A) Limited to Design AADT<_400-Show pavement material notations and thickness from Appendix IV Tables A and B. 1 (B)Show pavement section as developed inthe Pavement Design Guide. DR= 7.7 (See Appendix III for material notations and thickness equivalency values(a)). from Appendix II Description of Proposed Pavement Section Material Notation Thickness,h a (a x h) Surface SM 9.5A Superpave 1 1.67 1.67 Intermediate 0 Base BM25.0A 2.5 1.67 4.175 Subbase VDOT#21A 6 0.6 3.6 DP must equal or exceed the value of DR. DP= (a x h)= 9.445 SHIMP PROJECT MANAGEMENT CIVIL ENGINEERING LAND PLANNING ENGINEERING July 22, 2014 Albemarle County Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: RE: Out of Bounds WPO2014.24 This letter addresses the Stormwater Pollution Prevention Plan for Out of Bounds that satisfies the requirements of section 17-405 of the Albemarle county code. Registration Statement: A signed registration statement has been provided. Notice of General Permit Coverage: A copy of the notice of coverage will be provided upon receipt. General Permit: A copy of the general permit will be provided. Nature of Activity: The nature of this activity is a medium density residential development. Plan of the Site: A plan and a stormwater report have been provided with this submittal addressing the direction of stormwater flow, limits of land disturbance, major structural and nonstructural control measures, surface waters, concentrated stormwater, and support activities. Requirements of 40 CFR 450.21: A plan and a stormwater report have been provided with this submittal addressing the runoff volume and velocity, stormwater discharges, soil exposure, disturbance of steep slopes, sediment discharges, buffers, soil compaction, disturbed areas, and outlet structures. Qualified Personnel: Pete Wildman (434) 531-6557, Responsible Land Disturber 1 SHIMP PROJECT MANAGEMENT CIVIL ENGINEERING LAND PLANNING ENGINE RING July 22, 2014 Albemarle County Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: RE: Out of Bounds WP02014.24 This letter addresses the Pollution Prevention Plan for Out of Bounds that satisfies the requirements of section 17-404 of the Albemarle county code. Source of Pollutants: The source of pollutants for this project are petroleum based products associated with excavation; grease, fuel, oil, etc. Location of Pollutant generating activities: Contractor will be operating throughout the site, fueling will be limited to the staging area as shown on the plans. Non Stormwater Discharges: Fire hydrant flushings; Waters used to wash vehicles or equipment where soaps, solvents, or detergents have not been used and the wash water has been filtered, settled, or similarly treated prior to discharge; Water used to control dust that has been filtered, settled, or similarly treated prior to discharge; Potable water sources, including uncontaminated waterline flushings; Foundation or footing drains where flows are not contaminated with process materials such as solvents; Uncontaminated excavation dewatering, including dewatering of trenches and excavations that have been filtered, settled, or similarly treated prior to discharge; and Landscape irrigation. Person Responsible: Pete Wildman (434) 531-6557 Practices and Procedures: All fueling and construction materials will be stored in the designated staging areas and will be covered to keep rain water from washing materials away. Materials shall be stored in a location up gradient of a sediment trapping measure and located in an area away from storm water conveyance channels and inlets. In case of a spill this would keep the contaminent in a condition of overland flow which would allow the spill to be more easily contained. In case of a spill the contaminant shall be contained as well as possible using such measures as a spill berm, absorbent product, or other spill containing measure and the person responsible shall be notified immediately. All contaminant collection material shall be disposed of properly in a manner to prevent contact with stormwater. All wash water shall be directed toward sediment traps or sediment basins using filtration devices such as filter bags or sand filters or a similar effective control. All concrete wash water shall be directed into a leak proof container that shall be designed so that no overflows can occur due to inadequate sizing or precipitation. All hardened concrete waste shall be removed and disposed of in a manner consistent with the handling of other 1 construction wastes. Liquid concrete wastes shall be removed and disposed of in a manner consistent with the handling of other construction wash waters and shall not be discharged to surface waters. Pollution Prevention Awareness: This document will be provided to the contractor who will be responsible for informing all workers on the site of the Pollution Prevention Plan. 2 *r✓ Now Michelle Roberge From: Michelle Roberge Sent: Friday, June 20, 2014 3:50 PM To: 'Justin Shimp' Subject: RE: e2_wpo_Out of Bounds )1(Ok. No worries.Also,don't forget to submit a signed,sealed and dated copy of the talc/report along with the plans. Thanks! -Michelle From: Justin Shimp [mailto:justinCthshimp-engineering.com] Sent: Friday, June 20, 2014 3:47 PM To: Michelle Roberge Subject: RE: e2_wpo_Out of Bounds Yes,we have been looking at that spreadsheet but I think we will just stick with 09 regs on this. We have paid for coverage under the 2009 permit(not sure if Vito got the letter yet or not, I know they have cashed the checks). -Justin From: Michelle Roberge [mailto:mrobergeCaalbemarle.orq] Sent: Friday, June 20, 2014 3:35 PM To: Justin Shimp Subject: RE: e2_wpo_Out of Bounds Also,you have the option to apply the runoff reduction method if you would like to wait until July 1, 2014. I am just mentioning this to all applicants. -Michelle Roberge From: Michelle Roberge Sent: Friday, June 20, 2014 3:31 PM To: 'Justin Shimp' Cc: 'Vito Cetta' Subject: e2_wpo_Out of Bounds Hello, I have completed the review of WP02014-24. Please see my attached letter. << File: e2_wpo_Out of Bounds .pdf>> -Thanks, Michelle Roberge Michelle Roherge Department of Community Development 1 SHIMP PROJECT MANAGEMENT CIVIL ENGINEERING LAND PLANNING ENGINEERING May 8, 2014 Ms. Michelle Roberge Albemarle County Department of Community Development 401 McIntire Road Charlottesville, VA 22902 Regarding: RE: Out of Bounds Comment Response w PO 7,014 Dear Michelle, Thank you for your review of the WPO application for Out of Bounds. We have revised the plans per comments dated May 2, 2014. Please find below detailed comment responses describing the changes made to the plan for each of your comments that we have addressed. 1. The project title has been changed to include E&S and SMW plan. 2. The road plans have been removed from this submittal. 3. Managed slopes have been labeled. 4. There is minimal runoff from the site down Bennington Rd, we have added silt fence around the construction entrance to control the runoff. 5. A staging area has been added to the plan. 6. Inlet protection has been added to ST-32. 7. The contour labels have been revised. 8. The diversion ditch has been extended to include runoff as the 90 contour is graded. 9. The contours near lot 38 have been revised so that a 3:1 slope is maintained. 10. A berm with %2' of freeboard over the 10 Yr storm has been specified for each of the sump inlets on the southern side of the property. 11. The north and south side computations have been updated to reflect 2 WQV in the infiltration systems. 12. Profiles of the underground infiltration systems have been provided on Sheet C18. 13. The details for the weir end plates are drawn proportional a cross section to scale has been added. In addition to our details the manufacturer of the pipe system always provides shop drawings for the contractor. 14. The pipes on the North side have been lengthened. 15. The 100 Yr storm has lowered due to the addition of a second weir plate, the storm does overflow the pipe but remains in the stone drainfield around the pipe and does not overrun the system. 16. BMP numbers in the calculations have been updated to match the plans. 17. The addition of a second weir plate to each pipe system acts to disperse flow so that short circuiting is no longer a problem. 18. We have the manufacturer working on the shop drawings now that we have finalized the design for the system and will forward you their drawings and approval of our design as soon as it's available. 1 Please let us know if you have any additional questions about the revisions. 41 .S ' p ngineerng, P.C. ustin Shimp, P.E. / 2