Sullivan. Whippoorwill Club. Turf Management & Maintenance Facility. 150 Whippoorwill Road Armonk, NY 10504

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1 ANY ALTERATION OF PLANS, SPECIFICATIONS, PLATS AND REPORTS BEARING THE SEAL OF A LICENSED PROFESSIONAL ENGINEER OR LICENSED LAND SURVEYOR IS A VIOLATION OF SECTION 7209 OF THE NEW YORK STATE EDUCATION LAW, EXCEPT AS PROVIDED FOR BY SECTION 7209, SUBSECTION 2. COPYRIGHT 2014 by JMC All Rights Reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of JMC PLANNING, ENGINEERING, LANDSCAPE ARCHITECTURE & LAND SURVEYING, PLLC JMC SITE DEVELOPMENT CONSULTANTS, LLC JOHN MEYER CONSULTING, INC. (JMC). Any modifications or alterations to this document without the written permission of JMC shall render them invalid and unusable. Sullivan Whippoorwill Club Turf Management & Maintenance Facility 150 Whippoorwill Road Armonk, NY 10504

2 ANY ALTERATION OF PLANS, SPECIFICATIONS, PLATS AND REPORTS BEARING THE SEAL OF A LICENSED PROFESSIONAL ENGINEER OR LICENSED LAND SURVEYOR IS A VIOLATION OF SECTION 7209 OF THE NEW YORK STATE EDUCATION LAW, EXCEPT AS PROVIDED FOR BY SECTION 7209, SUBSECTION 2. COPYRIGHT 2014 by JMC All Rights Reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of JMC PLANNING, ENGINEERING, LANDSCAPE ARCHITECTURE & LAND SURVEYING, PLLC JMC SITE DEVELOPMENT CONSULTANTS, LLC JOHN MEYER CONSULTING, INC. (JMC). Any modifications or alterations to this document without the written permission of JMC shall render them invalid and unusable. Sullivan Whippoorwill Club Turf Management & Maintenance Facility 150 Whippoorwill Road Armonk, NY 10504

3 ANY ALTERATION OF PLANS, SPECIFICATIONS, PLATS AND REPORTS BEARING THE SEAL OF A LICENSED PROFESSIONAL ENGINEER OR LICENSED LAND SURVEYOR IS A VIOLATION OF SECTION 7209 OF THE NEW YORK STATE EDUCATION LAW, EXCEPT AS PROVIDED FOR BY SECTION 7209, SUBSECTION 2. COPYRIGHT 2014 by JMC All Rights Reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of JMC PLANNING, ENGINEERING, LANDSCAPE ARCHITECTURE & LAND SURVEYING, PLLC JMC SITE DEVELOPMENT CONSULTANTS, LLC JOHN MEYER CONSULTING, INC. (JMC). Any modifications or alterations to this document without the written permission of JMC shall render them invalid and unusable. Sullivan Whippoorwill Club Turf Management & Maintenance Facility 150 Whippoorwill Road Armonk, NY 10504

4 ANY ALTERATION OF PLANS, SPECIFICATIONS, PLATS AND REPORTS BEARING THE SEAL OF A LICENSED PROFESSIONAL ENGINEER OR LICENSED LAND SURVEYOR IS A VIOLATION OF SECTION 7209 OF THE NEW YORK STATE EDUCATION LAW, EXCEPT AS PROVIDED FOR BY SECTION 7209, SUBSECTION 2. COPYRIGHT 2014 by JMC All Rights Reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of JMC PLANNING, ENGINEERING, LANDSCAPE ARCHITECTURE & LAND SURVEYING, PLLC JMC SITE DEVELOPMENT CONSULTANTS, LLC JOHN MEYER CONSULTING, INC. (JMC). Any modifications or alterations to this document without the written permission of JMC shall render them invalid and unusable. Sullivan Whippoorwill Club Turf Management & Maintenance Facility 150 Whippoorwill Road Armonk, NY 10504

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9 ANY ALTERATION OF PLANS, SPECIFICATIONS, PLATS AND REPORTS BEARING THE SEAL OF A LICENSED PROFESSIONAL ENGINEER OR LICENSED LAND SURVEYOR IS A VIOLATION OF SECTION 7209 OF THE NEW YORK STATE EDUCATION LAW, EXCEPT AS PROVIDED FOR BY SECTION 7209, SUBSECTION 2. Sullivan Whippoorwill Club Turf Management & Maintenance Facility 150 Whippoorwill Road Armonk, NY All Rights Reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of JMC PLANNING, ENGINEERING, LANDSCAPE ARCHITECTURE & LAND SURVEYING, PLLC JMC SITE DEVELOPMENT CONSULTANTS, LLC JOHN MEYER CONSULTING, INC. (JMC). Any modifications or alterations to this document without the written permission of JMC shall render them invalid and unusable. COPYRIGHT 2014 by JMC

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12 RUNOFF REDUCTION VOLUME WORKSHEET JMC Project: Design Point: 1 Whippoorwill Club Drainage Area: PDA-1B Total Water Quality Treatment Volume DESCRIPTION SYMBOL VALUE UNITS Initial Water Quality Volume WQ V 1,284 Minimum Runoff Reduction Volume DESCRIPTION SYMBOL VALUE UNITS Design Storm [90% Rainfall Event Number] or [1-yr Storm Depth] P 3.1 In Total Area of new Impervious Cover Aic 0.10 Ac Hydrologic Soil Group (HSG) Specific Reduction Factor S 0.40 Runoff Coefficient [ x %I] R V 0.95 Impervious Cover targeted for Runoff Reduction [S x Aic] Ai 0.04 Ac TOTAL VOLUME Required [ = (P x R V x Ai) / 12] 423 Runoff Reduction Techniques (Volume) GREEN INFRASTRUCTURE PRACTICE / SMP SYMBOL VALUE UNITS Biofilter #1B 550 TOTAL 550 Runoff Reduction Is Total > Minimum? YES Date Printed: 9/25/2015

13 BIORETENTION WORKSHEET JMC Project: Design Point: 1 Biofilter #1B Drainage Area: PDA-1B Minimum Filter Bed Area DESCRIPTION SYMBOL VALUE UNITS Water Quality Volume WQ V 1,284 Coefficient of permeability of filter media (hydraulic conductivity) k 0.50 Ft / Day Filter bed Depth (soil media) d f 2.50 Ft Average Height of water above filter bed h f 0.25 Ft Design filter bed drain Time t f 2.00 Days Required Surface Area of Filter Bed [A f = (WQ V x d f ) / (k x (h f + d f ) x t f )] A f 1, SF Proposed Bioretention Area DESCRIPTION SYMBOL VALUE UNITS Calculated filter bed area (Length x Width) 1, SF Surface Area of Filter Bed Provided A f 1, SF Actual Volume Provided 1,375 Runoff Reduction DESCRIPTION SYMBOL VALUE UNITS 40% Runoff Reduction capacity (with underdrains) 550 Date Printed: 9/25/2015