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<br /> 'F
<br /> i`November 1996a
<br /> �..
<br /> AU-NC Prod
<br /> I I._,
<br /> 1 :,� Pa e ,J 1_ •;p a F 4 1 a � �v �c i •:+ y, � s .•; ,;� 4i t ��� aH 1 ni ,
<br /> 1r SS ,
<br /> x
<br /> I k 1 I 4 yA I A �� ✓' I�� /R 5y
<br /> , r a ew .. - � R N •`.- :' r `+ ';'.. ,• s '+'� '' m!. c. ' ' � r y !1 n�l 'fl° 1 !'w�;.
<br /> 2 , PETROLEUM„HYDROCARBON IMP',ACTED GROUND WATER,, f '' ' til }'
<br /> i r �1
<br /> } r '1: •'� i.' - a , ` •. s ;t, , ) '.ir ,.,,,YI I�� J J' .;y•i
<br /> (During the Septerriber.•1996 sampling,TPH ss was'detected in MW-2 and MV4�, 3 at�conce_ntrations
<br /> !j1 :e
<br /> of 960''and 4,300 s ierbillion;(ppb,reported.as rriicrograiiis per litei),respectively :Neither'TI'H `. 3
<br /> ss,rior BTE&„X.were°detecte(Iiri`any other samples;'collected.duririg the September 1'996sampling ,
<br /> event:Arialytical:results'ofground water samples are summarized in Table 2: The%laboratoryareport';:' t” ,:,,rr �;.
<br /> (AAL Batch Number 96 1001 009) andchain=of custody are included in Appendix B. z
<br /> e
<br /> ' 4 0. a}' CONCLUSIONS AND RECO_ MMENDATIONS
<br /> 4 1: CONCLUSIONS ;, { "
<br /> Based upoh,resultsrof'the ground,water monitoring'and well sampling, .A7c-ha'veth"c fallowing'',
<br /> i= conclusions: "
<br /> The dissolved hydrocarbon plume appears,ta:he'stable. WeII' MW-1 now represents.the''
<br /> {
<br /> ;esters
<br /> an -gradient.extent of.•the.impacte d.'ground water aCthe .site.'However.'the;:
<br /> . io� rth a terri,'down=gradient extent'of the disc as not-been delineated:
<br /> — ...._�
<br /> An additional ground titer I�io'iI'torin Dint will be:needed'to fully defi'rie fhe apparent
<br /> down gradient-eXtent of the dissolved hy'drocarban"plume.•'
<br /> • J
<br /> }
<br /> 4,.2. RECOMMENDATIONS
<br /> • _ ' ..
<br /> ' Based upon the-results of the'investigation,'AGE has the follawirig -ecomi"' ndations:
<br /> "The collc6tibn an,d•an"lysis'of t wo grab ground water and soil samples^from the site. One' ,
<br /> ,
<br /> {water sarripic'should be collected'from a.probe boring'established withiri"the`.eastern portion '
<br /> of,the building lacatedyori the'propeityAn•additional grab'water:sainple`should collecte
<br /> 'Y
<br /> from a probe laoritig.'estalalished ouifi of thc'former,UST'excavation.
<br /> :7 ' �3• -One' prob&,boring-should'advanced u er-the western edge�of the buriding at the site. Soil
<br /> 1 samples' should•also'be collected from the boring•,.to,-de'terrriine the 'late"ral.-extenf of the �,
<br /> iYripacted soil under-the huilding,on the site r
<br /> F++ ,If remediation;is.required,"feasibility'studies should•be performed to determine remedial
<br /> options for'tlie site:
<br /> ;. n
<br /> fi
<br /> The sex#-quarterly groundwater moni6fidg and sampling is scheduled for December 1996
<br />
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