Laserfiche WebLink
3.0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS <br /> Between November 23, 2010 and .-y 3, 2011,the groundwater potentiometric since in the <br /> r1l .,-,storing els rose an v r �;,:? of 5.09 feet, the groundwater gradient increased from <br /> ( . i ti; =ozl foott coot, and ti,=- -!dwater flaw direction remained toward the northeast. On <br /> May the potentiomet .c s_r face was at its highest level since the first monitoring wells <br /> were November <br /> ber otherwise, the groundwater flow and gradient characteristics <br /> appy ��=r) stent with hf� ., real and seasonal treads: <br /> tori w ns of petrolevrn hydrorrarl�onsin groundwater decrease away from the former UST <br /> SCUT e s c ,- f.. °Figure.4,the l teral tent` of imp cted €and €rater ap< rs to be <br /> mostly dei by the exp sttrrg oil Groundwater well network. in the fur down-grad, on <br /> y <br /> and crass-9 rent. perimeter",(l V.1-,3a. mW-4, Iwtllr'Vl-6, and MW-6) contains less than 400 lin <br /> ir <br /> f€PH-as-cjasoline and less than I of benzene. Vertically the concentrations of 04ir6ldum <br /> hydrocart ons decrease significantly below the groundwater table. <br /> 1, B t een November 23, 2011 and rs <br /> May 3, 2011,the concentrations of petroleun P 1r casire <br /> groundwater r rnairelatively consistent. As shown in the trend charts for ���.i.asz�g oa. <br /> X11 <br /> and benzene in 1 (Appendix Iva). concentrations have generally increased since the well <br /> lnsteiied and fIr st aa�pi�i to Novernber 2002. Theseincreases in concentration c(arra a <br /> 1 <br /> rise of appro rr a ty 3fe6t In.the,groundwater table elevation, between August 200 :end Marc <br /> £lq Since ,th8 Co n60ons of TPH-as-gasoline and benzene now appeat. ;t in <br /> ......,decline. Thh a tha..by th+s'end of 2007, the rate of natural attenuation may g; , <br /> exceeded thin r t+s of:continued leeching to groundwater. <br /> l=ebru ry 3'l1; EHO Agreed to review the case for low-risk regulatory closure. <br /> 3n pill It 21711., RAM.0 Environ ental submitted to EHD, Work Flair, Lowrtr hsk :.;ase Closure <br /> Ew it'ualr o ,w 'ri+ proposed the b6mpletion of a sensitive receptor survey, soilvapo! s ,rr pting arta <br /> an lysis;>hurw'' Iva#th risk:assess r rent, and a case closure report. <br /> riOh May 24, 2d- 1' ::EHEap TovW Akre work,plan with the additional request to include mass <br /> est m and flirts projection until water quality goals are achieved. <br /> Cu <br /> a'rerrtly,'ir apl rrtatiorr of the approved scope of work is pending client cot caval and <br /> ra tt e ri atitrrt t+o rpCe 1. ka ageEnvironmental anticipates that the planned worts can.be <br /> completed durrrt+g thr tfiird anter <br /> of 1 I. in the meantime, Ramage nvif �rfr�ental <br /> r cr r r da Chet future gro..0 ter monitoring and sampling be postponed until.1hevass <br /> lure evaluatrarr is corrrpleted: <br /> r <br />