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Preserve SWPPP 091613 ST O R M W A T E R P O L L U T I O N P R E V E N T I O N P L A N ( S W P P P ) FO R T H E Pr e s e r v e o n R i c e L a k e Ch a n h a s s e n , M N DR A F T S e p t e m b e r 1 6 , 2 0 1 3 Pr e p a r e d F o r : Pr o b e E n g i n e e r i n g 10 0 0 E a s t 1 4 6 th S t r e e t Bu r n s v i l l e , M N 5 5 3 3 7 95 2 - 4 3 2 - 3 0 0 0 Pr e p a r e d B y : Cu r t K a l l i o Ka l l i o E n g i n e e r i n g I n c . 10 7 7 5 P o p p i t z L a n e Ch a s k a , M N 5 5 3 1 8 61 2 - 4 1 8 - 6 8 2 8 Ta b l e o f C o n t e n t s SW P P P N a r r a t i v e Ap p e n d i x A : A - 1 : S o i l s M a p A- 2 : E n v i r o n m e n t a l l y S e n s i t i v e A r e a s , S t e e p Sl o p e s , I m p e r v i o u s S u r f a c e s , a n d B u f f e r A r e a s Ap p e n d i x B : S t o r m w a t e r M a n a g e m e n t D e si g n a n d C a l c u l a t i o n s ( T O B E I N C L U D E D W H E N F I N A L P L A N S A R E D E V E L O P E D ) P r e - C o n s t r u c t i o n D r a i n a g e A r e a s P o s t - C o n s t r u c t i o n D r a i n a g e A r e a s Ap p e n d i x C : C - 1 : E r o s i o n a n d S e d i m e n t C o n t r o l P l a n C- 2 : F i n a l S t a b i l i z a t i o n C- 3 : E r o s i o n a n d S e d i m e n t C o n t r o l D e t a i l s Ap p e n d i x D : R e c e i v i n g W a t e r s M a p w i t h i n 1 m i l e o f S i t e Ap p e n d i x E : E s t i m a t e d Q u a n t i t i e s Ap p e n d i x F : C o n s t r u c t i o n ( F i n a l c o n s t r u c t i o n p l a n s t o b e i n c l u d e d b y r e f e r e n c e ) Ap p e n d i x G : S W P P P r e l a t e d S p e c i a l P r o v i s i o n s ( N o n e I n c l u d e d ) Ap p e n d i x H : S W P P P T r a i n i n g d o c u m e n t at i o n ( I n c o r p o r a t e d v i a A m e n d m e n t ) Ap p e n d i x I : I n d i v i d u a l S i t e P l a n s ( I n c o r p o r a t e d v i a A m e n d m e n t ) St o r m w a t e r P o l l u t i o n P r e v e n t i o n P l a n ( S W PP P ) N a r r a t i v e P r e s e r v e o n R i c e L a k e – C h a n h a s s e n , M N SW P P P N a r r a t i v e – P a g e 1 Pr o j e c t D e s c r i p t i o n Th e P r e s e r v e o n R i c e L a k e i s a 1 6 - l o t r e s i d e n t i a l s u b d i v i s io n p r o j e c t i n C h a n h a s s e n , M N . T h e p r o p o s e d c o n s t r u c t i o n ac t i v i t y a s s h o w n i n t h e f i n a l c o n s t r u c t i o n p l a n s f o r t h i s p r oj e c t i n c l u d e g r a d i n g , e r o s i o n an d s e d i m e n t c o n t r o l , s t r e e t co n s t r u c t i o n , w a t e r a n d s a n i t a r y s e w e r , st o r m s e w e r , s t o r m w a t e r p o n d i n g , t u r f e s ta b l i s h m e n t , a n d a l l d e t a i l s n e c e s s a r y t o co n s t r u c t t h i s p r o j e c t Th e t o t a l e s t i m a t e d d i s t u r b e d a r e a i s 8 . 5 a c r e s a n d t h e e s t i ma t e d v o l u m e o f e a r t h w o r k t o b e m o v e d o n s i t e i s 3 0 , 0 0 0 C Y . Th e c o n s t r u c t i o n p l a n s a d d r e s s f o r e s e e a b l e c o n d i t i o n s a n d h o w to b e s t m a n a g e t h e r i s k a s s o c i a t e d w i t h t h e c o n d i t i o n s . Th e O p e r a t o r w i l l b e r e q u i r e d t o p r e p a r e a S i t e P l a n w h e n w o r k i n g a r o u n d s e n s i t i v e ar e a s . I n d i v i d u a l S i t e P l a n s w i l l b e in c o r p o r a t e d i n t o t h e S W P P P b y a m e n d m e n t . Kn o w l e d g e a b l e P e r s o n / C h ai n o f R e s p o n s i b i l i t y Th e O w n e r i s r e s p o n s i b l e f o r co m p l i a n c e w i t h a l l t e r m s a n d c o n d i t i o n s o f th e p e r m i t . T h e O w n e r w i l l d e s i g n a t e a S W P P P tr a i n e d d e s i g n e r a n d i n s p e c t o r t o o v e r se e t h e i m p l e m e n t a t io n o f t h e S W P P P . Th e O p e r a t o r i s t h e C o n t r a c t or h i r e d b y t h e O w n e r t o c o n s t r u c t t h e p r o j ec t . T h e O p e r a t o r w i l l p r o v i d e a S W P P P t r a i n e d in s p e c t o r t o i m p l e m e n t t h e i n s t a l l a t i o n , i n s p e c t i o n a n d m a i n te n a n c e o f t h e e r o s i o n p r e v e n t i on a n d s e d i m e n t c o n t r o l B M P s of t h e S W P P P u n t i l c o n s t r u c t i o n i s c o m p l e t e , t h e e n t i r e s i te h a s u n d e r g o n e f i n a l s t a b i l i za t i o n a n d t h e N O T h a s b e e n su b m i t t e d t o t h e M P C A . T h i s i n d i v i d u a l w i l l b e a v a i l a b l e t o m e e t t h e M P C A o n s i t e w i t h i n 7 2 h o u r s u p o n r e qu e s t b y t h e MP C A . Pr o j e c t C o n t a c t s Ow n e r : J o h n K n o b l a u c h , 6 1 2 - 4 9 0 - 4 5 4 0 SW P P P D e s i g n e r : C u r t Ka l l i o , 6 1 2 - 4 1 8 - 6 8 2 8 SW P P P I n s p e c t o r : On c e t h e i d e n t i t i e s o f t h e r e s p o n s i b l e p a r t i e s a r e k n o w n, t h e S W P P P w i l l b e a m e n d e d t o i n c l u d e t h i s i n f o r m a t i o n i n Ap p e n d i x G . SW P P P T r a i n i n g Th e S W P P P h a s b e e n p r e p a r e d b y a t r ai n e d S W P P P d e s i g n e r . T h e O p e r a t o r s h a l l d e s i g n a t e a S W P P P t r a i n e d in s p e c t o r a n d S W P P P t r a i n e d i n s t a l le r t o i m p l e m e n t t h e S W P P P . D o c u m e n t a t i o n o f t h e t r a i n i n g w i l l b e i n A p p e n d i x G o f th e S W P P P a n d i n c l u d e t h e f o l l o w i n g : a. N a m e s o f t h e S W P P P P r e p a r e r , S W PP P I n s p e c t o r , a n d S W P P P I n s t a l l e r b. D a t e s o f t r a i n i n g a n d n a m e o f i n s t ru c t o r a n d e n t i t y p r o v i d i n g t h e t r a i n i n g c. T r a i n i n g c o n t e n t t h a t c o mm e n s u r a t e w i t h t h e i n d i v i d u a l s j o b d u t i e s a n d r e s po n s i b i l i t i e s i n c l u d in g t h e n u m b e r o f ho u r s o f t r a i n i n g St o r m w a t e r D e s i g n , C a l c u l a t i o n s , a n d N a r r a t i v e Pe r m a n e n t s t o r m w a t e r m a n a g e m e n t w i l l b e a c h i e v e d b y w e t d e t e n t i o n p o n d s . A p p e n d i x B i n c l u d e s t h e n a r r a t i v e , st o r m w a t e r d i s c h a r g e s , d e si g n r e q u i r e m e n t s a n d c a l c u l a t i o n s . A p p e n d i x B d o e s n o t c o n t a i n t he a c t u a l H y d r o C A D mo d e l i n g r e s u l t s , b u t t h e y ar e a v a i l a b l e u p o n r e q u e s t . Ma i n t e n a n c e o f P e r m a n e n t S t o r m w a t e r S y s t e m s Th e C i t y o f C h a n h a s s e n w i l l b e r e s p o n s i bl e f o r t h e l o n g t e r m o p e r a t i o n a n d m a i n te n a n c e o f t h e P e r m a n e n t S t o r m w a t e r Ma n a g e m e n t S y s t e m s i n c l u d i n g t h e s t or m s e w e r s y s t e m a n d w e t p o n d s . Ti m i n g o f I n s t a l l a t i o n / C o n s t r u c t i o n S t a g i n g Co n s t r u c t i o n i s a n t i c i p a t e d t o b e g i n i n f a l l o f 2 0 1 3 . G r ad i n g c o n s t r u c t i o n i s a n t i c i p a t e d t o b e c o m p l e t e d i n 2 0 1 4 . Th e r o c k c o n s t r u c t i o n e n t r a n c e a n d i n l e t p r o t e c t i o n o n T i g u a L a n e w i l l b e c o n s t r uc t e d b e f o r e a n y ot h e r c o n s t r u c t i o n ac t i v i t y . T h e O p e r a t o r w i l l s w ee p t r a c k e d s o i l s o n p a v e d s u r f a c e s . Pe r i m e t e r c o n t r o l s w i l l b e p l a c e d b e f o r e l an d d i s t u r b i n g a c t i v i t i e s . T e m p o r a r y s ed i m e n t a t i o n b a s i n s w i l l b e c o n s t r u c t e d im m e d i a t e l y a f t e r p e r i m e t e r c o n t r o l s h a v e b e e n p l a c e d i f r e q u i r ed . A r e a s o f g r a d i n g a r e c l e a r l y m a r k e d i n t h e p l a n s b y th e “ c o n s t r u c t i o n l i m i t s ” n o t a t i o n . St o c k p i l e s w i l l b e c o v e r e d o r s t a b i l i z e d w i t h i n ( 7 ) d a y s a f t e r w o rk has ceased. Final site stabilization of all exposed areas wi l l b e c o m p l e t e d w i t h i n ( 7 ) d a y s a f t e r t h e c o nstruction activity in that portion of the site has temporarily or permanently ce a s e d . SW P P P C o m p o n e n t s Th e e r o s i o n a n d s e d i m e n t c o n t r o l p l a n s w h i c h i n c l u d e t he location and type of all temporary and permanent erosion pr e v e n t i o n a n d s e d i m e n t c o n t r o l B M P s a l o n g w i t h d e tails for the BMPs are shown in Appendix C. If a d d i t i o n a l B M P s b e c o m e n e c e s s a r y d u ring construction, the Owners SWPPP designer will recommend and/or approve su c h B M P s . Sp e c i f i c a t i o n s f o r S W P P P r e l a t e d co n s t r u c t i o n a r e r e f e r e n c e i n t he individual plan sheets. Special Provisions if required, ar e f o u n d i n A p p e n d i x G . Th e m o s t c u r r e n t c o n s t r u c t i o n p l a n s a r e hereby included into the SWPPP by reference and are not attached. The co n s t r u c t i o n p l a n s w i l l b e r e f e rr e d t o a s A p p e n d i x F . Es t i m a t e d Q u a n t i t i e s Es t i m a t e d q u a n t i t i e s f o r e r o s i o n a n d s e d i m e n t control items are included in Appendix E. Im p e r v i o u s S u r f a c e Th e p r e a n d p o s t c o n s t r u c t i o n i m p e r v i o u s s u r f a c e s a r e a s f o l l o w s : Pr e - C o n s t r u c t i o n = 0 . 0 a c r e s Po s t - C o n s t r u c t i o n = 2 . 5 0 a c r e s Si t e M a p A s i t e m a p w i t h s t e e p s l o p e s , i m p e r v i o u s s u r f a c e s , s o i l t y p e s , locations of potential pollutant generating activities, areas no t t o b e d i s t u r b e d , a n d b u f f e r z o n e s a r e i n c l u d e d i n A p p e n d i x A . A s i t e m a p w i t h e x i s t i n g a n d f i n a l g r a d e s , i n c l u d i n g d i v i d i n g lines and direction of flow for all pre and post construction st o r m w a t e r r u n o f f d r a i n a g e a r e a s l o c a t e d w i t h i n t h e p r o j e c t limits are included with the Stormwater Management Plan an d C a l c u l a t i o n s i n A p p e n d i x B . Ma p s o f S u r f a c e W a t e r s a n d W e t l a n d s A m a p o f a l l s u r f a c e w a t e r s , e x i s t i n g w e t l ands, and stormwater ponds within one mile from the project boundaries that will re c e i v e s t o r m w a t e r f r o m t h e c o n s tr u c t i o n s i t e , d u r i n g o r a f t e r c o nstruction is shown in Appendix D. Special or impaired wa t e r s a r e i d e n t i f i e d o n t h e m a p . Fi n a l s t a b i l i z a t i o n Fi n a l s i t e s t a b i l i z a t i o n m e t h o d s a r e s h o w n i n A p p e n d i x C . So i l M a n a g e m e n t Ex i s t i n g t o p s o i l w i l l b e s t r i p p e d a nd p r e s e r v e d . S o i l c o m p a c t i o n w i l l b e a v o i d e d in areas not needing to be compacted. Al l a r e a s t o h a v e v eg e t a t i o n r e - e s t a b l i s h ed will receive 6” of topsoil covering. Ch e m i c a l t r e a t m e n t s No c h e m i c a l t r e a t m e n t s s y s t e m s a r e p r o p o s e d Do c u m e n t a t i o n o f I n f e a s i b i l i t y Th e r e i s n o i n f e a s i b i l i t y o f c o n s t r u c t i n g temporary sedimentation basins on this project. There is no infeasibility as s o c i a t e d w i t h a v a il a b l e r i g h t - o f - w a y . En v i r o n m e n t a l R e v i e w S t o r m w a t e r M e a s u r e s Th e r e a r e n o s t o r m w a t e r p o l l u t i o n m i t i g a t i o n m e a s u r e s i d e n t ified in environmental review, endangered species review, ar c h e o l o g i c a l o r o t h e r r e q u i r e d l o c a l , s t a t e o r federal review conducted for the project. St o r m w a t e r P o l l u t i o n P r e v e n t i o n P l a n ( S W PP P ) N a r r a t i v e P r e s e r v e o n R i c e L a k e – C h a n h a s s e n , M N SW P P P N a r r a t i v e – P a g e 2 Ka r s t A r e a s Th e r e a r e n o k n o w n k a r s t a r e a s w i t h i n t h i s s i t e . Im p a i r e d W a t e r s a n d T o t a l M a x i m u m D a i l y L o a d s ( T M D L s ) Th e r e a r e n o s p e c i a l o r i m p a i r e d w a t e r s l o c a t e d w i t h i n 1 m i l e of t h e p r o j e c t l i m i t s t h a t r e c e i v e r u n o f f f r o m t h e p r o j e c t s i t e . Th e r e a r e t w o i m p a i r e d l a k e s w i t h i n 1 m i l e of t h e p r o j e c t , b u t t h e y d o n o t r e c e i v e r un o f f f r o m t h e p r o j e c t s i t e . T h o s e l a k e s ar e l i s t e d b e l o w : Ri l e y L a k e : I m p a i r m e n t s – M e r c u r y i n f i s h t i s s ue , n u t r i e n t / e u t r o p h i c a t i o n bi o l o g i c a l i n d i c a t o r s La k e S u s a n : I m p a i r m e n t s – M e r c u r y i n f i s h t i ss u e , n u t r i e n t / e u t r o p h i c a t i on b i o l o g i c a l i n d i c a t o r s En v i r o n m e n t a l l y S e n s i t i v e A r e a s Th e r e a r e e x i s t i n g w e t l a n d s s u r r o u n d i n g t he s i t e t h a t r e c e i v e r u n o f f f r o m t h e si t e . T e m p o r a r y s e d i m e n t a t i o n b a s i n s sh o u l d b e u s e d t o t r e a t c o n c e n t r a t e d r u n o f f f r o m e x p o s e d a r e a s pr i o r t o r e l e a s i n g i t t o t h e w e t l a n d s . A r e a s u p s l o p e o f th e e x i s t i n g w e t l a n d s n e e d t o b e s t a b i l i z e d w i t h i n 2 4 h o u r s o f f i na l g r a d i n g i f a t e m p o r a r y s e d i m e n t a t i o n b a s i n i s n o t u s e d . SW P P P A m e n d m e n t s Th e S W P P P w i l l b e a m e n d e d a s n e c e s s a r y w h en t h e r e i s a c h a n g e i n d e s i g n , c o ns t r u c t i o n , o p e r a t i o n , m a i n t e n a n c e , we a t h e r o r s e a s o n a l c o n d i t i o n s t h a t h a s a s i g n i f i c a n t e ff e c t o n t h e d i s c h a r g e o f p o l l u t an t s t o s u r f a c e w a t e r s o r un d e r g r o u n d w a t e r s . T h e S W P P P m a y a l s o be a m e n d e d w h e n i n s p e c t i o n s or i n v e s t i g a t i o n s b y s i te O w n e r o r o p e r a t o r s , US E P A o r M P C A o f f i c i a l s i n d i c a t e t h e S W P P P i s n o t e f f e c t i v e i n e l i m i n a t i n g o r s i g n i f i c a n t l y mi n i m i z i n g t h e d i s c h a r g e o f po l l u t a n t s t o s u r f a c e w a t e r s o r u n d e r g r o u n d w a t e r s o r th a t t h e d i s c h a r g e s a r e c a u s i n g w a t e r q u a l i t y s t a n d a r d ex c e e d a n c e s . So i l T y p e s Th e s o i l t y p e s f o u n d o n t h i s p r o j e c t a r e p r i m a r i l y c l a y l o a m s w i th a h y d r o l o g i c s o i l g r o u p o f B / C a s s h o w n i n A p p e n d i x A . Du e t o t h e s l o p e s o n t h e s i t e a n d t h e c o n c e n t r a t e d f l o w s e x pe c t e d , t h e s e s o i l s w o u l d b e c o n s i d e r e d s u s c e p t i b l e t o er o s i o n . T h e s e s o i l s w i l l a l s o a d h e r e to e q u i p m e n t a n d t i r e s w h e n w e t s o t r a c ki n g i s e x p e c t e d w h e n t h e r e a r e w e t co n d i t i o n s . Te m p o r a r y S e d i m e n t a t i o n B a s i n s No d e s i g n a t e d t e m p o r a r y s e d i m en t a t i o n b a s i n l o c a t i o n s a r e s h o w n . T h e O p e r at o r w i l l p r o v i d e d t e mp o r a r y s e d i m e n t a t i o n ba s i n s w h e n m a n d a t e d b y t h e p e r m i t a n d s h o u l d u s e t h e m a s a n o r m a l p a r t o f t h e g r a d i n g o p e r a t i o n s w h e n n o t r e q u i r e d . De w a t e r i n g A n d B a s i n D r a i n i n g De w a t e r i n g i s a n t i c i p a t e d f o r s o m e s t re e t c o n s t r u c t i o n a n d p i p e i n s t a l l a t i o n . T h e O p e r a t o r w i l l p r o v i d e a S W P P P am e n d m e n t f o r p r o p o s e d d e w a t e r i n g a c t i v i t i e s . Tu r b i d o r s e d i m e n t l a d e n w a t e r s r e l a t e d to d e w a t e r i n g o r b a s i n d r a i n i n g w i l l b e d i sc h a r g e d t o a s e d i m e n t a t i o n b a s i n o r st o r a g e t a n k . T h e d i s c h a r g e f r o m t h e s e d i m e n t a t i o n b a s i n o r s t or a g e t a n k m a y b e r e l e a s e d t o s u r f a c e w a t e r s i f t h e w a t e r ha s b e e n v i s u a l l y c h e c k e d t o e n s u r e a d eq u a t e t r e a t m e n t h a s b e e n o b t a i n e d a n d n u i sa n c e c o n d i t i o n s w i l l n o t r e s u l t f r o m th e d i s c h a r g e . If d i s c h a r g e w a t e r c o n t a i n s o i l o r g r e a s e , a n o i l w a t e r s e pa r a t o r o r s u i t a b l e f i l t r a t i o n d e v i c e w i l l b e u s e d p r i o r t o di s c h a r g i n g t h e w a t e r . D i s c ha r g e p o i n t s w i l l b e a d e q u a t e l y pr o t e c t e d f r o m e r o s i o n a n d s c ou r . T h e d i s c h a r g e w i l l b e di s p e r s e d o v e r n a t u r a l r o c k r i p r a p , s a n d b a g s , p l a s t i c s h ee t i n g , o r o t h e r a c c e p t e d e n e r g y d i s s i p a t i o n m e a s u r e s . Al l w a t e r f r o m d e w a t e r i n g o r b a s i n d r a i n in g a c t i v i t i e s w i l l b e d i s c h a r g e d i n a ma n n e r t h a t d o e s n o t c a u s e n u i s a n c e co n d i t i o n s , e r o s i o n i n r e c e i v i n g c h a n n e l s o r o n d o w n s l o p e p r op e r t i e s , o r i n u n d a t i o n i n w e t l a n d s c a u s i n g s i g n i f i c a n t ad v e r s e i m p a c t t o t h e w e t l a n d . If f i l t e r s w i t h b a c k w a s h w a t e r a r e u s e d , th e b a c k w a s h w a t e r w i l l b e h a u l e d a w a y f o r d i s p o s a l , r e t u r n t h e b a c k w a s h w a t e r to t h e b e g i n n i n g o f t h e t r e a t m e n t p r o c e s s , o r i n c o r p o r a t e t h e b a c k w a s h w a t e r i n t o t h e s i t e i n a m a n n e r t h a t d o e s n o t ca u s e e r o s i o n . T h e b a c k w a s h w a t e r m a y b e d i s c h a r g e d t o t h e sa n i t a r y s e w e r i f p e r m i s s i o n is g r a n t e d b y t h e s a n i t a r y se w e r a u t h o r i t y . T h e f i l t e r s a n d / o r m e d i a s h o u l d b e r e pl a c e d o r c l e a n e d a s n e c e s s a r y f o r a d e q u a t e f u n c t i o n . In s p e c t i o n s a n d M a i n t e n a n c e Th e O p e r a t o r s S W P P P t r a i n e d i n s p e c t o r w i l l r outinely inspect the entire construction site at least once every seven (7) da y s d u r i n g a c t i v e c o n s t r u c t i o n a n d w i t h i n 2 4 h o u r s a f t e r a r a i n fall event greater than 0.5 inches in 24 hours. Following an i n s p e c t i o n t h a t o c c u r s w i t h i n 2 4 h o urs after a rainfall event, the next inspection will be conducted within seven (7) da y s a f t e r t h e r a i n f a l l e v e n t . A l l i n s p e c tions and maintenance conducted during construction will be recorded within 24 ho u r s i n w r i t i n g a n d t h e s e r e c o r d s w i l l b e r e t a i n e d w i t h the SWPPP. Records of each inspection and maintenance ac t i v i t y w i l l i n c l u d e : a. D a t e a n d t i m e o f i n s p e c t i o n s b. N a m e o f p e r s o n ( s ) c o n d u c t i n g i n s p e c t i o n s c. F i n d i n g s o f i n s p e c t i o n s , i n c l u d i n g t h e s p e c i f ic location where corrective actions are needed d. C o r r e c t i v e a c t i o n s t a k e n ( i n c l u d i n g d a t e s , t i m e s, and party completing maintenance (activities) e. D a t e a n d a m o u n t o f a l l r a i n f a l l e v ents greater than 1/2 inch (0.5 inches) in 24 hours. Rainfall amounts will be ob t a i n e d b y a p r o p e r l y m a i n t a i n e d r a i n g a u g e i n s t a l l e d o n s i t e , a weather station that is within 1 mile of your lo c a t i o n o r a w e a t h e r r e p o r t i n g s y stem that provides site specific rainfall data from radar summaries. f. I f a n y d i s c h a r g e i s o b s e r v e d t o b e o c c u r r i n g d u r i n g t h e i n spection, a record of all points of the property from wh i c h t h e r e i s a d i s c h a r g e w i l l b e m a d e , and the discharge should be described (i.e., color, odor, floating, settled, or s u s p e n d e d s o l i d s , f o a m , o i l s h e e n , a n d o t h e r obvious indicators of pollutants) and photographed. g. A n y a m e n d m e n t s t o t h e S W P P P p r o p o s e d a s a r e s u l t o f the inspection will be documented as required in Part II I . B . w i t h i n s e v e n ( 7 ) c a l e n d a r d a y s . In s p e c t i o n F r e q u e n c y A d j u s t m e n t a. W h e r e p a r t s o f t h e p r o j e c t s i t e h a v e permanent cover, but work remains on other parts of the site, inspections ma y b e r e d u c e d t o o n c e p e r m o n t h i n those areas of permanent cover. b. W h e r e c o n s t r u c t i o n s i t e s h a v e p e r m a n e n t c o v e r o n a l l exposed soil areas and no construction activity is oc c u r r i n g a n y w h e r e o n t h e s i t e , t h e s i te will be inspected during non-frozen ground conditions at least once per mo n t h f o r a p e r i o d o f t w e l v e ( 1 2 ) m o n t h s . c. W h e r e w o r k h a s b e e n s u s p e n d e d d u e t o f r o z e n g r o u nd conditions, the inspections may be suspended. The re q u i r e d i n s p e c t i o n s a n d m a i n t e n a n c e s c h e d u l e will begin within 24 hours after runoff occurs at the site or 24 ho u r s p r i o r t o r e s u m i n g c o n s t r u c t i o n , w h i c h e v e r c o m e s f i r s t . In s p e c t i o n s a n d m a i n t e n a n c e o f t e m p orary and permanent water quality management BMPs will be performed until an o t h e r P e r m i t t e e h a s o b t a i n e d c o v e r a g e u n d e r this Permit or the project has undergone Final Stabilization, and an NOT ha s b e e n s u b m i t t e d t o t h e M P C A . Al l e r o s i o n p r e v e n t i o n a n d s ed i m e n t c o n t r o l B M P s a n d P o l l u t i o n P r e v e n t i on Management Measures will be inspected to en s u r e i n t e g r i t y a n d e f f e c t i v e n e s s du r i n g a l l r o u t i n e a nd post-rainfall event inspections. All nonfunctional BMPs will be re p a i r e d , r e p l a c e d , o r s u p p l e m e n t e d w i t h f u n c t i o n a l B M P s by the end of the next business day after discovery. The fo l l o w i n g i n s p e c t i o n a n d m a i n t e n a n c e requirements will be complied with: a. A l l p e r i m e t e r c o n t r o l d e v i c e s w i l l be repaired, replaced, or supplemented when they become nonfunctional or the se d i m e n t r e a c h e s ( 1 / 2 ) o f t h e h e i g h t of the device. These repairs will be made by the end of the next business da y a f t e r d i s c o v e r y , o r t h e r e a f t e r a s s o on as field conditions allow access. b. T e m p o r a r y a n d p e r m a n e n t s e d i m e n t a t i o n b a s i n s w i l l b e drained and the sediment removed when the depth of se d i m e n t c o l l e c t e d i n t h e b a s i n r e a c hes (1/2) the storage volume. Drainage and removal will be completed within 72 h o u r s o f d i s c o v e r y , o r a s s o o n a s f i e l d c o n d i t i o n s a l l o w a c c e s s . c. S u r f a c e w a t e r s , i n c l u d i n g d r a i n a g e d i t c h e s a n d c o n v e y ance systems, will be inspected for evidence of erosion an d s e d i m e n t d e p o s i t i o n d u r i n g e a c h i n s p e c t i o n . A l l d e l t a s and sediment deposited in surface waters, including dr a i n a g e w a y s , c a t c h b a s i n s , a n d o t h e r drainage systems will be removed. Areas of exposed soil at removal lo c a t i o n s w i l l b e r e - s t a b i l i z e d . The removal and stabilization will take place within seven (7) days of discovery un l e s s p r e c l u d e d b y l e g a l , r e g u l a t o r y , or physical access constraints. d. C o n s t r u c t i o n s i t e v e h i c l e e x i t l o c a tions will be inspected for evidence of off site sediment tracking onto paved su r f a c e s . T r a c k e d s e d i m e n t w i l l b e r e moved from all paved surfaces both on and off site within 24 hours of di s c o v e r y , o r i f a p p l i c a b l e , w i t h i n a s horter time to comply with the permit. e. S t r e e t s a n d o t h e r a r ea s a d j a c e n t t o t h e p r o j e c t w i l l b e i n s p e c t e d f o r evidence of off site accumulations of se d i m e n t . I f s e d i m e n t i s p r e s ent, it will be removed in a manner and at a frequency sufficient to minimize off site im p a c t s . St o r m w a t e r P o l l u t i o n P r e v e n t i o n P l a n ( S W PP P ) N a r r a t i v e P r e s e r v e o n R i c e L a k e – C h a n h a s s e n , M N SW P P P N a r r a t i v e – P a g e 3 Al l i n f i l t r a t i o n , f i l t r a t i o n , a n d b i o r e t e n t io n a r e a s w i l l b e i n s p e c t e d t o e n s u r e t ha t n o s e d i m e n t f r o m o n g o i n g c o n s t r u c t i o n ac t i v i t y i s r e a c h i n g t h e i n f i l t r a t i o n a r e a , a n d t h a t e q u i p m e n t i s n o t b e i n g d r i v e n a c r o s s t h o s e a r e a s . St o r a g e , H a n d l i n g , a n d D i s p o s a l o f C o n s tr u c t i o n P r o d u c t s , M a t e r i a l s , a n d W a s t e s Bu i l d i n g p r o d u c t s t h a t h a v e t h e po t e n t i a l t o l e a c h p o l l u t a n t s w il l b e u n d e r c o v e r ( e . g . , p l a s t i c sh e e t i n g o r t e m p o r a r y r o o f s ) to p r e v e n t t h e d i s c h a r g e o f p o l l u t a n t s o r p r o t e c t e d b y a s i m i l a r l y e f f e c t i v e m ea n s d e s i g n e d t o m i n i m i z e c o n t a c t w i t h st o r m w a t e r . Pe s t i c i d e s , h e r b i c i d e s , i n s e c t ic i d e s , f e r t i l i z e r s , t r e a t m e n t c h e m i c a l s , a n d la n d s c a p e m a t e r i a l s w il l b e u n d e r c o v e r ( e . g . , pl a s t i c s h e e t i n g o r t e m p o r a r y r o o f s ) t o p r e v e n t t h e d i s c h a r g e o f p o ll u t a n t s o r p r o t e c t e d b y s i m i l a r l y e f f e c t i v e m e a n s de s i g n e d t o m i n i m i z e c o n t a c t w i t h s t o r m w a t e r . Ha z a r d o u s m a t e r i a l s , t o x i c w a s t e , ( i n c l u di n g o i l , d i e s e l f u e l , g a s o l i n e , h y d r a u l i c f l u i d s , p a i n t s o l v e n t s , p e t r o l e u m b a s e d pr o d u c t s , w o o d p r e s e r v a t i v e s , ad d i t i v e s , c u r i n g c o m p o u n d s , a n d a c i d s ) w i l l b e pr o p e r l y s t o r e d i n s ea l e d c o n t a i n e r s t o pr e v e n t s p i l l s , l e a k s o r o t h e r d i sc h a r g e . R e s t r i c t e d a c ce s s s t o r a g e a r e a s w i l l b e p r o v i d e d t o p r e v e n t v a n d a l i s m . S t o r a g e an d d i s p o s a l o f h a z a r d o u s w a s t e o r h a za r d o u s m a t e r i a l s w i l l b e i n c o m p l i a n c e w i t h M i n n . R . c h . 7 0 4 5 i n c l u d i n g se c o n d a r y c o n t a i n m e n t a s a p p l i c a b l e . So l i d w a s t e w i l l b e s t o r e d , c o l l e c t e d a n d d i s p o s e d o f p r o p e r l y i n c o m p l i a n c e wi t h M i n n . R . c h . 7 0 3 5 . Po r t a b l e t o i l e t s w i l l b e p o s i t i o n e d s o t h a t t h e y a r e s e c u r e a n d w i l l no t b e t i p p e d o r k n o c k e d o v e r . S a n i t a r y w a s t e w i l l b e di s p o s e d o f p r o p e r l y i n a c c o r d a n c e w i t h M i n n . R . c h . 7 0 4 1 . Fu e l i n g a n d M a i n t e n a n c e o f E q u i p m e n t o r V e h i c l e s Sp i l l P r e v e n t i o n a n d R e s p o n s e : Re a s o n a b l e s t e p s w i l l b e t a k e n to p r e v e n t t h e d i s c h a r g e o f sp i l l e d o r l e a k e d c h e m i c a l s , in c l u d i n g f u e l , f r o m a n y a r e a w h e r e c h e m i c a l s o r f u e l w il l b e l o a d e d o r u n l o a d e d i n c l u d i n g th e u s e o f d r i p p a n s o r ab s o r b e n t s u n l e s s i n f e a s i b l e . Fu e l i n g w i l l b e b e d o n e i n a c o n t a i n e d a r e a u n l e s s i n f e a s i b l e . Ad e q u a t e s u p p l i e s w i l l b e a v a i l a b l e at a l l t i m e s t o c l e a n u p di s c h a r g e d m a t e r i a l s a n d t h a t a n a p p r o p r i a te d i s p o s a l m e t h o d i s a v a i l a b l e f o r r e co v e r e d s p i l l e d m a t e r i a l s . S p i l l s w i l l b e re p o r t e d a n d c l e a n e d u p i m m e d i a t e l y a s r e qu i r e d b y M i n n . S t a t . § 1 1 5 . 0 6 1 , u s i n g d r y c l e a n u p m e a s u r e s w h e r e p o s s i b l e . No f u e l s t o r a g e t a n k s i n e x c e ss o f 1 0 0 0 g a l l o n s w i l l b e o n s i t e d u r i n g c o n s t r u c t i o n . A l l o n s i t e fu e l s t o r a g e t an k s s h a l l h a v e se c o n d a r y p r o t e c t i o n f o r s p i l l s . Ve h i c l e a n d E q u i p m e n t W a s h i n g Wa s h i n g o f v e h i c l e s i s l i m i t e d t o a d e f i n e d a r e a o f t h e s i t e . Ru n o f f f r o m t h e w a s h i n g a r e a w i l l b e c o n t a i n e d i n a s e d i m e n t ba s i n o r o t h e r s i m i l a r l y e f f e c t i v e c o n t r o ls a n d w a s t e f r o m t h e w a s h i n g a c t i v i t y wi l l b e p r o p e r l y d i s p os e d o f . S o a p s , de t e r g e n t s , o r s o l v e n t s w i l l b e p r o p e r l y s t o r ed . N o e n g i n e d e g r e a s i n g i s a l l o w e d o n s i t e . Co n c r e t e a n d O t h e r W a s h o u t s W a s t e Ef f e c t i v e c o n t a i n m e n t w i l l b e u s e d f o r a l l l i q u i d a n d s o l i d w a st e s g e n e r a t e d b y w a s h o u t o p e r at i o n s ( c o n c r e t e , s t u c c o , pa i n t , f o r m r e l e a s e o i l s , c u r i n g c o m p o u n d s a n d o t h e r c o n s t r u c t i o n m a t e r i a l s ) r e l a t e d t o t h e c o n s t r u c t i o n a c t i v i t y . T h e l i q u i d an d s o l i d w a s h o u t w a s t e s w i l l n o t c o n t a c t th e g r o u n d , a n d t h e c o n t a i n m e n t w i l l b e d e s i g n e d s o t h a t i t d o e s n o t r e s u l t i n ru n o f f f r o m t h e w a s h o u t o p e r a t i o ns o r a r e a s . L i q u i d a n d s o l i d w a s t e s w i l l b e d i s p o s e d o f p r o p e r l y a n d i n c o m p l i a n c e w i t h MP C A r u l e s . A s i g n w i l l b e i n s t a l l e d a d j a ce n t t o e a c h w a s h o u t f a c i l i t y t h a t r e q u i re s s i t e p e r s o n n e l t o u t i l i z e t h e p r o p e r fa c i l i t i e s f o r d i s p o s a l o f w a s h o u t w a s t e s . Al l c o n c r e t e t r u c k s s h a l l h a v e a s e l f - c o n t ai n e d c o l l e c t i o n s y s t e m f o r wa s h o u t s a n d n o c o n c re t e t r u c k s w i l l b e a l l o w e d t o wa s h o u t o n t o t h e s i t e . C u r b m a c h i n e s o r c o n c r e t e p a v e r s m a y b e w a s h e d o u t o n s i t e p r o v i d e d t h a t i t i s d o n e o n t h e r o a d gr a d e a n d n o w a s h o u t w a t e r l e a v e s t h e r o a d g r a d e . Fi n a l S t a b i l i z a t i o n Al l d i s t u r b e d a r e a s t o b e r e - v e g e t a t e d s ha l l r e c e i v e a m i n i m u m o f 6 ” o f t o p s o il , b e s e e d e d w i t h M n / D O T S e e d M i x t u r e 25 0 a t 7 0 l b / a c r e , a n d m u l c h e d w i t h T y p e 1 m u l c h a t 2 t o n s / a cr e , u n l e s s s p e c i f i e d o t h e r w i s e . A l a w n s e e d m i x t u r e o r so d d i n g ( t y p e l a w n ) m a y b e s u b s t i t u t e d i n p r o p o s ed l a w n a r e a s a t t h e d i s c r e t i o n o f t h e O w n e r . It i s a n t i c i p a t e d t h a t s u f f i c i e n t t o p s o i l will be obtained from excavations on-site. On-site topsoil shall be considered ac c e p t a b l e f o r r e - u s e . I f t o p s o i l b o r r o w is required, it shall meet the requirements of Mn/DOT 3877. All disturbed areas sh a l l b e s t a b i l i z e d w i t h i n t h e t i m e f r a m es as specified in the NPDES Permit. The final as-built plan will verify drainage pa t t e r n s a s p e r t h e a p p r o v e d g r a d i n g p l a n . W i t h i n 3 0 d a y s a f t e r final site stabilization, the Owner shall submit a NOT. Fi n a l S t a b i l i z a t i o n i s n o t c o m p l e t e u n t i l all of the requirements below are met: 1. A l l s o i l d i s t u r b i n g a c t i v i t i e s a t t he site have been completed and all soils are stabilized by a uniform perennial ve g e t a t i v e c o v e r w i t h a d e n s i t y o f 7 0 p e rcent of its expected final growth density over the entire pervious surface ar e a , o r o t h e r e q u i v a l e n t m e a n s n e c e s s a r y t o prevent soil failure under erosive conditions. 2. T h e p e r m a n e n t s t o r m w a t e r m a n a g e m e n t s y s t e m i s c o n s tructed, meets all requirements in Part III.D. of the pe r m i t a n d i s o p e r a t i n g a s d e s i g n e d . T e m p o r a r y o r p e rmanent sedimentation basins that are to be used as pe r m a n e n t w a t e r q u a l i t y m a n a g e m e n t b a s i n s h a v e b e e n c l e a n ed of any accumulated sediment. All sediment has be e n r e m o v e d f r o m c o n v e y a n c e s y stems and ditches are stabilized with permanent cover. 3. A l l t e m p o r a r y s y n t h e t i c a n d s t r u c t u r al erosion prevention and sediment control BMPs (such as silt fence) have be e n r e m o v e d . B M P s d e s i g n e d t o d e c o m p o s e o n s i t e ( s u c h a s s o m e c o m p o s t l o g s ) m a y b e l e f t i n p l a c e . 4. F o r r e s i d e n t i a l c o n s t r u c t i o n o n l y , i n d i v i d u a l l o t s a r e c o n s i d e r e d f i n a l l y stabilized if the structure(s) are finished and te m p o r a r y e r o s i o n p r o t e c t i o n a n d d o w n g r a d i e n t p e r i m e t e r control has been completed and the residence has be e n s o l d t o t h e h o m e O w n e r . A d d i t i o n a l l y , t h e P e r m i t t e e h a s distributed the MPCA’s “HomeOwner Fact Sheet” to t h e h o m e O w n e r t o i n f o r m t h e h o m e O w n e r o f the need for, and benefits of, permanent cover. 5. F o r c o n s t r u c t i o n p r o j e c t s on a g r i c u l t u r a l l a n d ( e . g . , p i p e l i n e s a c r o s s c r o p , f i e l d p a s t u r e o r r a n g e l a n d ) t h e di s t u r b e d l a n d h a s b e e n r e t u r n e d t o i t s preconstruction agricultural use. Tr a n s f e r o f O w n e r s h i p If l o t s a r e s o l d a n d r e s i d e n t i a l ho m e c o n s t r u c t i o n i s t o b e g i n p r i o r t o f i n a l s i t e stabilization, a Notice of Termination/Permit Mo d i f i c a t i o n F o r m w i l l b e u s e d t o t r a n s f e r the permit to the Owner of the lot. The new permittee will be responsible for all co n d i t i o n s o f t h e o r i g i n a l S W P P P . Ap p e n d i x A - 1 : S o i l s M a p KALLIO 1237Appendix AJ&S VENTURES10775 Poppitz Lane Chaska,MN 55318 612-418-6828 Curt Kallio Construction Site Management - Expires May 31, 2016 Design of Construction SWPPP - Expires May 31, 2016 1450 Knob Hill Lane Excelsior, MN 55331 Preserve at Rice Lake Chanhassen, MN KALLIO 1237Appendix AJ&S VENTURES A p p e n d i x A - 2 : E n v i r o m e n t a l l y S e n s i t i v e A r e a s , St e e p S l o p e s , I m p e r v i o u s S u r f a c e s , a n d B u f f e r A r e a s 10775 Poppitz Lane Chaska,MN 55318 612-418-6828 Curt Kallio Construction Site Management - Expires May 31, 2016 Design of Construction SWPPP - Expires May 31, 2016 1450 Knob Hill Lane Excelsior, MN 55331 Preserve at Rice Lake Chanhassen, MN LE G E N D KALLIO 1237Appendix C Preserve at Rice Lake Chanhassen, MNJ&S VENTURES Ap p e n d i x C - 1 : E r o s i o n a n d S e d i m e n t C o n t r o l P l a n 10775 Poppitz Lane Chaska,MN 55318 612-418-6828 Curt Kallio Construction Site Management - Expires May 31, 2016 Design of Construction SWPPP - Expires May 31, 2016 LE G E N D 1450 Knob Hill Lane Excelsior, MN 55331 KALLIO 1237Appendix C Preserve at Rice Lake Chanhassen, MNJ&S VENTURES A p p e n d i x C - 2 : F i n a l S t a b i l i z a t i o n P l a n 10775 Poppitz Lane Chaska,MN 55318 612-418-6828 Curt Kallio Construction Site Management - Expires May 31, 2016 Design of Construction SWPPP - Expires May 31, 2016 SE E D I N G N O T E S LE G E N D 1450 Knob Hill Lane Excelsior, MN 55331 KALLIO 1237Appendix C Preserve at Rice Lake Chanhassen, MNJ&S VENTURES Ap p e n d i x C - 3 : E r o s i o n a n d S e d i m e n t D e t a i l s 10775 Poppitz Lane Chaska,MN 55318 612-418-6828 Curt Kallio Construction Site Management - Expires May 31, 2016 Design of Construction SWPPP - Expires May 31, 2016 1450 Knob Hill Lane Excelsior, MN 55331 Ap p e n d i x D : S W P P P R e c e i v i n g W a t e r s W i t h i n 1 M i l e o f S i t e KALLIO 1237Appendix DJ&S VENTURES10775 Poppitz Lane Chaska,MN 55318 612-418-6828 Curt Kallio Construction Site Management - Expires May 31, 2016 Design of Construction SWPPP - Expires May 31, 2016 Preserve at Rice Lake Chanhassen, MN1450 Knob Hill Lane Excelsior, MN 55331 Es t i m a t e d S W P P P Q u a n t i t i e s Ap p e n d i x E Mn D O T Es t i m a t e d Sp e c . D e s c r i p t i o n U n i t Q u a n t i t y 21 0 1 . 5 1 1 C L E A R I N G A N D G R U B B I N G L S 1 . 0 0 21 0 5 . 5 0 1 C O M M O N E X C A V A T I O N C U Y D 3 0 , 0 0 0 . 0 0 25 7 3 . 5 0 2 S I L T F E N C E , T Y P E M A C H I N E S L I C E D L I N F T 3 , 2 0 0 . 0 0 25 7 3 . 5 3 0 S T O R M D R A I N I N L E T P R O T E C T I O N E A C H 1 1 . 0 0 25 7 3 . 6 0 2 T E M P O R A R Y R O C K C O N S T R U C T I O N E N T R A N C E E A C H 1 . 0 0 25 7 5 . 5 0 1 S E E D I N G A C R E 8 . 0 0 25 7 5 . 5 0 2 S E E D M I X T U R E 2 7 0 L B 5 6 0 . 0 0 25 7 5 . 5 0 2 S E E D M I X T U R E 3 1 0 L B 5 . 0 0 25 7 5 . 5 1 1 M U L C H M A T E R I A L T Y P E 1 T O N 1 4 . 0 0 25 7 5 . 5 1 9 D I S K A N C H O R I N G A C R E 7 . 0 0 25 7 5 . 5 2 3 E R O S I O N C O N T R O L B L A N K E T C A T 4 S Q Y D 9 , 0 0 0 . 0 0 25 7 5 . 6 0 4 E R O S I O N S T A B I L I Z A T I O N M A T C L A S S 2 S Q Y D 1 3 0 . 0 0 Pa g e 1