|
sn rr a U 4� 'I'lI H1I;-� ' "' i+ i. �, .n - :�.� 7!' �� 11 `' 9- ,�• 1 {!-i+�� _ ' I +' l , a �r" y � .,j
<br /> + p," aA'7u yg1.?�fr �' fr 7 r 4 y ipi
<br /> I'Y I ;• .A Y =yv L,� ' rµ! hl', ti{. •,A SY. I �+S r� I.
<br /> re
<br />:1111 ti 1. I` i •I its t -�3 a F r' t r .. r'" r�`i 1�.`I �. � j, '�
<br /> +?% 14 ; �,'F `cV• L 1� rt w{r'1- , h', ��' i �:1 r � 'tS 1-1 '
<br /> d
<br /> di r II
<br /> y lJkti as it of Nj r r I 4fx J Y4. I Y If,•J 1 1' i' L r
<br /> ' { cs II li r s Ik t r i
<br /> r� f
<br /> K,h�€�,I ''�I] Y(' I,. ..,t ''il' i i l..'� �� _y ry Iµ. H Y �• I r•., "� I ''.j ; yl ,:,,7j �s,ti �j i11 1�h1v 1 i'r,{.
<br /> t , f i +�� ; J 1❑ ! `x I 1 < E Ii. '� r r � 7 �,� .i, s. � , , I ' + �� �', � 't �,� �ur 1 � .r� � k � � '1 �,}i I
<br /> `,, ��AGE NC Project'No 98 0504
<br /> A, 110,
<br /> I ,y 1 1 Yf1f 1• 1, i r -11., '., N j it tiV
<br /> ! Att le � J 5. eI •t-' u p I. o
<br /> r,Page{3 of 3:
<br /> ite
<br /> r form are`included'in Appendix C: !
<br /> i'
<br /> :4.0. 'SUMMARY AND CONCLUSIONS::`
<br /> +! 'Based on'the findings from this`investigation,tAGErconcludes
<br /> ' • ' ;The groundwater elevations on=site'ranged from 17.68 feet-(MW-3)-to.18.60 feet(MW-2)
<br /> Imo ..
<br /> below'MSL.-Ground water flow was inferred',to be flowing 'toward the southwest-at.a ,.
<br /> gradient of approximately 0.010 footlfoot:
<br /> TPH-g and MTBE.were detected in,the'ground waier'sample collected from well MW-.1 at. '
<br /> "concentrations of 230µg11 each,-which exceeds the California Department of Health Services
<br /> ' .Maximum ContaminantlL . els. ,
<br /> . The lateral extent of'the dissolved MTBE is not yet defined to the north or west,of the site. -
<br /> '.' 5.0., RECOMMENDATIONS
<br /> Based on'the findings of the environmental activities recounted in this,report, AGE recoinmends:
<br /> Continuation of quarterly ground water monitoring at,the site The next monitoring event 'J
<br /> should be performed in September 2004.
<br /> • Additional site assessment work including cane penetrometer testing and the installation of
<br /> additional monitoring wells to determine the vertical and'lateral extents 1. of dissolved'MTBE :;
<br /> at the site:
<br /> 6.0. LIMITATIONS
<br /> ,Our'professional services were performed:using thatdegree.of care and skill ordinarily exercised by
<br /> ' .'enviromnental consultants practicing in this or similar localities. The findings were based mainly
<br /> upon. .analytical'' results provided by ' an independent laboratory. -Evaluations., of the
<br /> geologic/hydrogeologic'conditions'at the site for the purpose of this investigation are made from a
<br /> "limited number of available data points(e.g..ground water samples),and subsurface conditions may,
<br />' wary away,from.these. data points: No other warranty, expressed or'implied,Jsmade as to,the"
<br /> pro fessional.interpretations, opinions, and-tecoinmendations contained in this report.
<br /> Advanced deoEnvironmental,IncA.
<br /> : �` 1
<br />
|