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.. ;:, .:.... <br /> ;. <br /> m <br /> _ <br /> - . <br /> - 1 1�1 4 TQ N H I P 2 N �: � . <br /> . <br /> S E GT , N E 4 E , 1�rV . �ll . <br /> z. <br /> � , . . o <br /> �:. <br /> . BASIC SOIL AMENDMENT NOTES <br /> - � <br /> Soil retention. Retain, in an undisturbed state, tha duff layer and native uVi <br /> i �3 srz�x���'�����1��� ` �S� topsoi( to the maximum exfent practicable. In any areas requiring grading w <br /> ���x����� '�" � '` remove and stockpile the duff layer Qnd topsoii on site in a designated, � <br /> �, ��,�������� , <br /> I <br /> �.'����,�.-� ����� controlied area, not ad jacent to pubiic resources and criticaf areas, to be <br /> x rea Iied to ather ortions of the site where feasible. <br /> �� w z .����,� �� � <br /> ' -' . . . .. - ' � 3 � . ' ' . . . � . � ' . � . . � � � � � <br /> �; �s ��w ��:.: � �_,_-�_�..._._�.���._..__ --____ � PP P <br /> �� ��� <br /> — . <br /> �� � `'�''������ j ,�''-� -� <br /> - �.�`���:��`�`�����;�� � ;. Hous� � � 3 ` Soil quality. All areas sub ject to clearing and grading thpt have not been W <br /> � � �`r� -� � � ? r:.,; � covered by impervious surface, incorp'orated into p drainage facilit or i- <br /> � � �.,,,, � Y Q <br /> � � � � en.gineered as structurai fill or slope shall, Qt project completion, p <br /> �,�. � � <br /> ���� 5' � .;� `� : l � ----- demonstrate the following: ° <br />. . . . . � . . . ....� . � M' a`;,", a.-`;'-^..;..._.,....�:.�..........m,�• .E � . `.� � . . � . . . � . . . . � � . <br /> � �'� ""�� � : ° � '�� k� ��"� ' °. ~��-rv ���� ss'oo 4. 1. A to soil la er with a minimum or anic matter content of 10% dr ��- a a . <br /> ., , ri � � � . �� �„�.�.x_.�..- . . . -----� f � `� `* P Y <br /> . 9 Y <br /> �� � <br /> � � �'�"l�r:.t. ��i' 'a• -- y <br /> . . . . . . . . ., v��.'a Z� �t�`` � ..�.� ��. 5 5�..,.r. .d �.' . • mm . ' . .. . . . . . . . . . . . , <br /> : �� �,� �, � t.: . i <br /> . � . . � -:, -a'.c: �-v'-a v.�' . �_xy [�'.'e,�3 : a� - , • 4 � Q d �: 4:� .�. 4 .'� :4 . . . . . fe � � - . . � . . . � We�ghL <br /> . . . . a .,...,'�,s, , <br /> -� T ��z��"� • •�.;.,r,;; . , .. -. ,: � . . � . . 4.. .�,�-~�.., � �.; plantingnbeds, and 5� organic matter content in turf areas, and a pH from � <br /> ( -�, � �� �"�;� <br /> � � � � ��� � � � � � � � <br /> �� ���. ������� �:a�. ;. .°.�� , m' : •��6.".. ,.d .: , �a:�_ ; �:�„ .�' 'd .� �`� �� � � ��q .`�� "�'� � � 6:0 to 8.0 or matching the pH of� the� undisturbed soil. The topsoil �layer �9�...��,�, � � <br /> �. - . �� � <br /> j � � �. � ��. . °� � �� . � , . 4 •-�a ��- �,; • i• �� •.� � �` ��`� � shall have .a minimum de th of ei ht inches exce t where tree roots limit .'� "'•.� � <br /> � � . ... ��4� � �. � . • . •. . P 9 � � <br /> . . ' ' . - . . . . . - . . y'}'� ' .. . A .. : '• . . ., . . . 1 . . , ` <br /> . . .. . ,,. i � e� ' 4 /' ' . - � . . <br /> • . . .:._ . .O . . - +'` +�+ +�*i <br /> . . . . .. , ^�",� 7'S�'�y ��:5__. � • ' .`..d. s 3.�_�. .n ' � f. :T�.. ; . - ' . . [�^ �'fj� . t'� �jj'�f'+ 4 . . _ . ' . . . . . . , . <br /> ',j. � the depth of incorporation of amendments needed to meet the criteria y:=" • �� <br /> Subsails below the to soii la er should be scarified at least 4 inches with � :� � �� � + <br /> . ���"rtatLr 's _ ......,�,�...m..........«.�......,...es..«^--_.. Q' 6• ' � .3L.1j l.ls�...:f�Sl. /... .I I�� �4✓LJ3 t . . . . . <br /> �,� h�E���� �� �,� �`� � _• . r I � ; P Y .,� �i y. <br /> ��4����R � . �; x •:� ° ''' �• � l � some incorporation of the upper rnaterial to avoid stratified layers, where �,� ;. <br /> � ��,��� , , : l ?- feasibis. o� '�:;. . <br /> �...� . <br /> .�..•�.�a.....__ ; <br /> j � . <br /> ��� ���� � �� '� . ... � " � � � �� � 2: Mulch planfing beds with 2 inches of organic material `�Sp�... •'F <br /> , ��� �, ..4 . , � <br /> �-� � <br /> " °' � � � � � 3. Use compost and other materials that meet these organic content <br /> � . . . . , . . . . . . �'' E F�����"��° ' . _ . ' . � � _. � . • � . � . . . . . . . � . . � � - . . <br /> � � <br /> �.�� � '.. . . �� k � � � requirernents: <br /> ������� - �� ��: ���Q A � ' � ,� `'� a. The organic content for "pre-approved"amendment rates can be met <br /> . . , . . . . . . . . ry.��. �?3�'� � - � � .� .. v _ �aV9 � � �� � - - � Crft . . � � . . <br /> � ������ � •0 r- �' � only using compost meeting the compost specification for BMP T7.30: <br /> I ��a��} � � "v ' ' �, i <br /> 1 `����° � •'�� } ��' �{ �'�� `� Bioretention Cells, Swales, and Planter B.oxes Cp.959), with the exception � <br /> . � � that the compost ma hove u to 35� biosolids or manure. <br /> ' �.� ; . � � Y P <br /> ' , .. � . � <br /> � � ' � ` � � The compost must also have an organie matter content of 40% to 65�, <br /> ` � �, a% •�' ; '� � 4 � � and a carbon to nitrogen ratio below 25:1. �� � <br /> 4 � <br /> ��Ja��4��r "' .�` . � � The carbon to nitrogen ratio may be as high as 35:1 for plantings '� <br /> ;-�F , •.. CovEF�D R� SF � � � � _ compased a <br /> DECK :v � �� <br /> INFILTRAT10N ` �•� ` n., , t � � . entirely of plants native to the Puget Sound Lowlands region. �/'1 <br /> �� ;� � .� S �S� SS rs � �r r <br /> �q�qi� ; �,�� �z��� , : . . • � � b. Calculated amendment rates may be met through use of composted - � <br /> ���' � `' � material meetin a. above• or other or anic materials a <br /> ($0 X7�) ;��'�"�'���� � �� � cn •.,•. ' i � <br /> 1 � g ( ) , g mended to � � <br /> ROCK OVERFl.OW � ' - � � ` N �' • .` � �/' meet the carbon to nitrogen ratio requirements, and not exceeding the <br /> DIRECT TO NOR7N ���� � � � � ,} : � contaminant limits identified in Table 22Q-=-B, Testing Parameters, in � <br /> - �"��i�a � ! •� /' � <br /> I � ���� � �' i s � � WAC 173-350-220. � ^♦ <br /> PROP ���f,�.�� �� � .1 . ' �c'� l � �/� W <br /> ��,�, � � -�,�t�� �.�;.;�� D j V J <br /> BIORETENTION � � r�f � ����g � :04 ,..��.. :,�"o5�p = ` � � � o� i �--.�� The resulting soil should be conducive to the type of vegetation to be � <br /> �� `�� g,4�Tr s C :F �' O)z y,��' I :Y. ;n <br /> , . � ��� ��� �` .�. �RIv�WR�.. .. �;� m � established. rn <br /> (15 XS) ����,���� �``W�`'� � o ' ' . • •,, • ' � r�,2� � V! � <br /> ��`'���� � � � � '� �', . ;•.�,, ;. ` � Implementation Options: The soil quality design guidelines listed above can � <br /> ��`������ ' = ' � be met by using one of the methods listed below: � <br /> ������� � � � � ���.� � 1. Leave undisturbed native vegetation and sail, and protect from � <br /> DEV. FLOW g"g���� .� J •: , � r - <br /> ARROWS ��'� ' � ;I .- . . � � <br /> . � � � com action durin construction: <br /> (TYP.) ��� � ` p���, << . . ... � <br /> P 9 � <br /> �t����� : � � �f,� .•�• � �' -�� � � � 2. Amend existing site topsoil or subsoil either at <br /> _ � ,� � � � _ <br /> �;��F �� #` � � � ?' �, default "pre-approved"rates, or at custom calculated rates based on tests <br /> ���: =p. f � ��� of the soil pnd amenciment. <br /> � N s '34'° E 3. Stockpile existing topsoil during grading, and replace it prior to <br /> -' ,f� � ra:Y?.9.,{e » � . . <br /> � %`��� `��" �°���'� � planting. Stockpiled tapsoil must also be amended if needed to meet the � o � <br /> �'� � � NNI.f� <br /> ,� ���}������ ' � �.� organic matter or depth requirements, either at a � � <br /> � <br /> . ,. � ; �� . �� � 5 0 TH .�;W �H���: ����>��� fa — <br /> „�, ��,. � a , ������� � ���'�� �„�� �i�� ��� , de ult '�re approved"rate or at a custom calculated rate. Q c� �- <br /> � � ..� � � F: .` ''� �a ,, �`��.�� ,.�::>. � : .. #. �"��� ,� :x �'��`��x�,"� � `s�,s�°� � <br /> _ . E`'""�. _,... � ' u ,..$:�..�` v. > . . 1 . ..v;�. � �p", ,�" � '�=.':zd��.��,, ��, r r. ,r4 '� . . . O � . <br /> �z.��i. ;:- w ,< �°:��: ��, ' u � ,�:� �.��� ���....- ..�������� �, _ rF:�. 4. Im rt to soil m.x of sufficient or anic content a W ti ai <br /> x ., ���-. ��� � � , � .� „� _��=�� �:, -;�� � .�. ��_� „ .�., P P g nd depth to meet the <br /> � ;�. 'i'T�� �,�, �,y �`.":$� �...a,.� .,,, �����. ir:.s - � �� .�^'�''�,`�:5 y S,� ros `b'u:`;��'st� . . . <br /> . � . - . �x.,...."� -3,;.,.���3 �; �.:s� _fi , s�`. ...:���. . �� � � .....,. . ��.,�a ..,..n;` �'_ _-� $a_ . .<;�..:-�,; .,... '� .,�."�,...� .; ?rx �G�r �. .,.�_ . . Q � � <br /> �-�� �� .�+ �. ��> � -�. � _�� .� ��: � ;fi`� :� �� { :>3� �7 � <br /> �, �.. z � � �.�,�v � ,�: -:� ��::��`�� r� � � ..�, ���, .���� � � _.yx re uirements. <br /> � ;:�.. - <br /> ,.:� nt.;�t,Z .:s�-� x�'�"„"�:---�. "`a�,�`�...F� •Y '�';,> c��"� �,'';�;�-. �r'a#,.v�:�� �r� `'-.'-5..;�„ .r �" F^,�� `".-�-a�*.s� . '1 . . C� N� <br /> , _ . . . �?�'-� .�� �..-�s � � �.. a,-.. � r. � � ,� .��'�"`T'—.xs�`���a�"� t'_ .H'� `� . . , . � �j . <br /> � � � � ' . - . , - . . . . � � �- "�� '��.�z {�. tT' � �'"_ °r ��.�5� ��. � ��'�� s-� >r� 'r '.�.` "g s�_ '� ...��a,r��"�,�'c,.�,,�_-�-Y'x'.,3 , . . . . . . . . . . . � � . <br /> - . � � . . . . ` Q. .�:�.w .: � � "�� ���.��r 3`r . ``'� ,� �"'� • s �� . � -�.� ���r�� s- , -..��, ��„�;..x�„-N� . . � � . . . � . � � � N . <br /> � . . ' � . . � .: �."�� ���. . � ��',' � P. <br /> a t ,���, �: . � .� sy�.z, '' � �' � � �4 ' <br /> � � �� ��� �.�.��, � � : � t � �,� ,�, �� ���;3,��� �� �� ��„_,���-�-�a���-�- �.- �More than one method may be �used on different portions of the same sit . F- � �t � <br /> . , < . N����� ���: i . : � a.�.�3r . �.�������;L�>-,���.� �`� Soil that alread meets the de th and or a ' W W .►r �... <br /> � f y p g nic matter quality standards, <br /> _ . _ . . � . 2...,__.._.. �s�1� ' L,..�-�„�..��������I�,��s< -w,�'}'" ��' �� � 1 . . .. . � . . . . . . . . . . . <br /> �:^���� � �����,� ��. . � < � '� � � ,,.-' � and is not compacted, does not need to be amended. � W <br /> � � � . . � . � .� , . - . . ''�i����� ��Fa�� `�b�.t'����}}�'.3 . . `� . . . � . . . . r' . <br />. . ' , . _ . . . . a� d . w" sf i i � �,,..^'� ..-..,...„„ . . ��r � ,-.�.. . .. i�� . . . . . . <br /> � .. . _ . , . . . . . I �S �':'� �'�-��'$ ��'�zwg�¢'��� � �._,.... � - �- - . . .-.•^`,.......,, ..'^-----.,..,,,,„,.-,.. . . . "^" , ' _ , . "•::,:_.,.. ' � . � ' . . . . . . . .. . . � � � . <br /> � �,��y ��� r -�.:�`C" ��' ����--�_�._ ...._,__ ...�� __�-:..�,��-,^.,.,,,_„ -�.-.. � �. 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