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r 1 t <br /> r <br /> f 'a+ .` � � Approximate Area of Consistently Elevated <br /> _ M - _• a - Sub-Surface Methane Concentrations <br /> ` #. e s?�,�1;,' L <br /> -- �I • I. tiiir Current Extent of Dump and Contaminated <br /> i•-yam r►a + :`� �__ i Soil(Beneath Clean Soil Cover) <br /> ,vu;a / p \ {y�gpryll ,11. --- Extent of Dump Prior to City's 2008-2009 <br /> '--_�� vr+ ,^+- - = .y i •___! Dump Closure <br /> vxai .\ 11\ j ' _- ]ti er9+a • •--••- LFG Vent Piping <br /> • R: a r <br /> i jy', \ \ �� _ _ "�wij.i +I r++ r Redevelopment Block Boundary <br /> / \ ',Orj�erwe. �1- AO RedevelopmentBlockldentity <br /> vu' - nr 9 Proposed Vertical Vapor Vent 33 Total <br /> �.:.. �, - L C -I` .1 1. P P ( ) <br /> VIA•n G vR 1 4k ! C. +I z .n Vapor Monitoring Point <br /> L,_ \. / Nate• ! ' ' <br /> _ •� -3 — TARK \�'{v'_n / y1• . ,.I t Methane Concentration 51.25%(All <br /> • • ,'J _ • <br /> • )' � i 1 . Readings October 2010-Current) <br /> >= ` p�`�� j '♦--•--_ vra-1 ! :.r • ' ` I - L Methane Concentration 51,25%since <br /> '� t ��`�_ -... VM-10 a‘tiir.17. et . \ .- _�/ ,1 0 November 2011,but Previousy>1.25%on <br /> / q I I 111 <br /> �'�� `�� �`v" 'J '• 1-. Occasion <br /> I I . , vR.11 <br /> I• - VR.......„../... <br /> 2 j/ r / r fl j k: Methane Concentration Consistently>5% <br /> I / + ✓ <br /> /'-•• y• +', ; Sealed or Planned to be Sealed Vapor <br /> J! vii.i d�=+ \ e e Q Monitoring Point <br /> , t"! `.., `-Q F G 1 / /: I �. ', '; i .A / -, ° -- Groundwater Monitoring Wet <br /> L" vMa <br /> S r. LFG Vent Riser <br /> aI I- / ! _ <br /> L <br /> fi CD / <br /> ,� , <br /> a; I i se. mot( /vR-e ;y�t��y • - . :. <br /> - <br /> t.��—�_— � ' r tom.! A","F+ �/`- �•' , 4• <br /> ao• <br /> .. 4;ci,„____,- ____-.- . ., ,. 0 200 400 <br /> is :� <br /> M -__ i• <br /> w.,M A _.••'i..0' • LFG system to be rms.,ct wlt❑ _ - C. '� r. <br /> .. <br /> rifiAFT <br /> _ vF-: i'- / �,,. Cevelopmere in;he area • ;� <br /> •T ! I �// - VII" .ate • �.:.'. u•�— .t • <br /> I. IA iNT.06 <br /> __. r - 't Figure 1 <br /> -p •.. ., ` — . -fir 1 7""• _- ;'�_.�. - - ,r.. •r CURRENT SUB-SURFACE METHANE <br /> 'e+wnce 1' > - _�. �= - CONDITIONS-MAY 2013 <br /> " r Eastern Portion of the New Brighton <br /> L = — Exchange <br /> r_ '- s oo " it t' xat�30,•' City of New Brighton,MN <br /> �� ua41Wf.Ec G...e,,no. ICA. ro Ae:,:it Gw. <br /> w- <br />