2005_0808_Packet - Laserfiche WebLink

Home

ATTACHMENT B Twin Lalces Redevelopment Phase � MPCA VIC Project Nuinber VP467� MODLFICATIONS AN�} COMM�I�7'TS Figures 6 througli 9 of the Report illustrating the locations of the proposed bori7�gs currently do not illustrate the locations of existing buildings (or identified areas of concern). The MPCA �iaif requested additional �gures on June 23, 2005, to provide overlays of existing buildings via e-mail correspondence with _`_r i. Electz-oa�.ic versions of those additional �gures were provided to the MPCA project staff oi� June 28, 2005, and have been 1��viewed. The MPCA staff understand that tI�es��res will be provided as part of a sup lement or amend�neilt to the Re ort in orde� tn facilitate review of the locations of the proposed borii�gs rela�ive to the locations of existing structu�-es _ —.�� . 2. Section 1.2, page 13. Figure 10 is describec� as a grading plan that shorvs cuts and �lls. The �gure includes a le�e�d for cut and �11. with a color pat�en� to illustrate the respeciive areas �roi�osed for cuts and �al. �` v_IPCA staff request th�t onc� � cut and �11 plan with contours has been finalized that cobies of tlaese b]a�IS i�e �z'ovi e�3ie MPCA witl� a describtion of anv si�ni�cant cations to the cut and �11 plan d'• illustrated on Figure 10 or in Tables 1 tiarau�l� 11. Section 2.1, Scope of Worlc. The scope of worlc for ih�: soil investigation should include focused � , iti�l'�l:l'::=••� F:II�� : t:Ill��:I�l� 0= =}!� -�7's1-:lF� .1}1�'� �lk 4`{S�I�L- ;':?I'Er.:� = t��f17i=�=i!i:.i I�r I�I~�= I!- ��r+��I �.F.i' �i[:�'��'�, �,�i71_k�i:::[:•�iY,L.. :'� _ �' t t� �:'eJ �,'�zi=t�� = '1':u T!�.��:��17t•�_rl Y�:_it�t_J '_�'t:i'_ �...iii::;'�7�=��1 _{}i4+:i:=.=:]i::+ ' �Y :{��_tit'l:�t'i� _- �Il:�;�i'•'.4 ��i�:!1�= 4r-I��'? �ll�-�''�=i'':�_=�t'�.�:C'd ri{'�ITir� S�L�•_� I:I72fE{•ELfF:?Hiiilii } � y � r • 7 -- �:y�:._'�I ' � r: r:;�' .I�•:I •i� ' �.� .• � i:��'•• �il� •li�: lir•.� i•�. . ::i � � , ir.�_�r .L.il�'r ��.rvJti��'�fl.l �TII�7;��'�■�x:�11-.i1 -- �i - � wa er c arac eriza ion in e vlc�nz o . -- 4. During the advancement of the probes proposed in the Repart, the MPCA staff recommend that additional sain�les be collected as neces�s� -t deterr��ine the extent and character of the fill encountered in the shallow soils on thc��K arcel oniainiri� debr�s ulcl�ading plastic, wood, and styrofaam (see conunent Ib in the October 2004 NT�1'CA RAP review letter). Tl�is e of fill debris is_ not appropriate for residential land use a�ad should be delineated, characterized and targeted for � L'��i'.!t'•I . —.. ___ —� . ..��• • 5. The Contv�geaicy Plan is acceptable for the proposed Phase .CI Worlc proposed, however, information regarding how investigation-dez-ived waste ��'T�� shall be managed shall be provided to the M�'CA_ Section 3.5, page 1$. In addition to collecting san��les �Fqz RCRA metals in soils or fill containing ashes, cinders, or clinlcers, the MPCA staff recommend that :;� �._ _:_ for RCR� metals be collected and analyzed to c�-�aracter7ze debris fill identi�ed from�revious investigations at the ��. In addition, ;�•.t�'tiil , �.�'i-� :_�1.1.--.�:�: i:i_:.,•i.�? I��.:i �, ,...•i:•.' .��i • . ., .. ,_ : � for RCRA rnetals �e co leeted to characterize �o�-tinns of the excess fill that will be targeted foz offsite disposal. Although the excess fill soils are proposed to be characterized ��ti�g this investigation, please note t�1at the MPCA staff rnay request additional characterization based on the �117a1 cut/fi�� plan, results of this investigation, and depending upon tl�e proposed of�site use for the excess soils. 7. Section 3.�}_ Please provide proposed utilities map once this i�lfoz-��.atio�� is available as part a Report supplement illustrating the depth and type of utility s�rvice, and also indicate which existing utilities willremain and which will be avat�do��ed if any.