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20 July I 998 <br /> A .,, <br /> P GE-NC Protect t79 <br /> r age'-3 of 4 <br /> 12 IVIICRti <br /> OBIOLO = <br /> GICAL ACTiVIT'Y•IN GRC? jD <br /> ; 'Generaf microbloIogical 1 <br /> WA <br /> 14 p,ate cow increased <br /> and ItMtiV nf.s incre n:'the <br /> the cond ro ' <br /> rernainin dieing se quarter of I 99 g and water sample cnllectecl' <br /> .. g relatively stabl $: Selective late from.NIW-9 <br /> results were e in MW-14'. Nutrient c P :counts decreased in <br /> 'p observed in IV1W_g::A�s oncentrations increased i MW 9' while' <br /> �r pt1?nurxi levels.,C olute numbers of b n.MW- 4,'while: <br /> hemlcal oth plate cowits and nutrients remaln:betaw,' <br /> and'Table4. Thula and microbiolagica� data f - <br /> Sro nd <br /> are included in APP radix ?eport(A. Keith Kadfriian r21 June ]gg water are 'surnrnarizecl.ori Table: 3; <br /> $) and chalk'of f <br /> ,+ CI1StOC1y, orrn <br /> 3:3 `PETROLEUM!HYDRO 'E r <br /> CA RB4 <br /> Pring " N-IMPACTED GRO.U7VD,VVA3-ER <br /> g the .Tune 1998 <br /> sampling event, petroleum h <br /> samples from each of,the seven wells " <br /> ydrocarbons <br /> sampled:TPH- were. detected in'ground water". <br /> `.method"detection limits-to�270 parts per bill <br /> ' ,., ` <br /> g concentrations ranged from belouv,laboratory <br /> were detected-at cOneentrations;as Iron. <br /> PPb, reported as <br /> and 141 high as d.5 b micrograins per liter . <br /> .PPb.xylel�es."Thehi'' Pp. benzene,'6:4`pPb toluene, b,3 ) BTE&X,. <br /> anal" $hest concentrAtions ysis by EPA Methcjd 50� are presen ed on Ta wi�re detected iri MIW-8 and,MWp 4b T y]benz <br /> ble 5'.- he results cif <br /> Tertiary butanol was det <br /> were ected in"MW 6 at•a co <br /> not detected in the-samples nc.entration of <br /> (1 2=D a1??ples.eollected 23 PPb. Other ox , <br /> CA) was,dete during the J genated'cam <br /> cted in MW utle 1998 sarn 1i Pflun.ds <br /> ppb• Six additional.' -8, MW-9, and MW-14 at c P ng event.-1,2.Dichloroeth <br /> report(MAI Lab, es,:detected-'oy,EPA Meth n ntrations ran in' from-2 <br /> anaIyt o ce ane <br /> in tory I. D:Nos:.g od 8260,are'note� 4 ppb to r, <br /> PPendix,$, 0349 through 90355)'aril c in Table 6.=The Iaborato <br /> ry <br /> A haln-of custody form <br /> a s are incl <br /> aded' <br /> a <br /> DisCIx <br /> USS pN <br /> f' AND C4NCLUSIQNS; ' <br /> Based-upon data e <br /> oZlected from the site; AGI✓ Ends <br /> • Ground water eIevat 7 R <br /> ion has cont' <br /> r t ycontiliues' be tow r lnued to Y1Se at'.the Slte.' <br /> to <br />• '`. .A si nific and the south southwest at the site. '.a-Gr°und water flow direction <br /> g. ant decrease 1n"Petro <br /> conte urri hydrocarbo ' <br /> ntratlons °' r f <br /> remalried'1ow = ns was de�tectea.in MW-'14 <br /> event;'demonstrating,continilted S a remarnng wells sampled cerin the J Hydrocarbon 1 <br /> ability of the Iume g une 1998 sa_m iin ' <br /> •',+m nBE"tivas <br /> 46t detected in'any of the T " P. °f dissolved hydrocarbons:.. g ' <br /> E •' <br /> toring,event ,g ound water samples co1� d ' ' <br /> r ected wring the=June.•1998 <br /> „ advanced <br /> C' <br /> e <br /> �� .. clinviroa .. <br /> { ,!• ' 4 .a ' . V _, Inc. , <br />