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<br /> 22 February 2000V`-,-;A;7, : - �` ,-1 �—�r , -" � , - ,- Y T}
<br /> AGE-NC Project No 98 0432: a � � �n x {�``
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<br /> _ , -,. r 'z. - 'F`=.;.--. ' �� a '1 kms.. r -�-p t. i
<br /> xw Additionally„the.s1.oil at a depth of seven feet.three feet.below,.the invert of the USTthad been - 1
<br /> p . impacted-with solvents and PCBs 7 'r __ - r �., � �� �_' - -
<br /> _ "• Ther soil was placed~back iri the excavat on aiid covered-w:rth clean pea gravel fill'and .1
<br /> �: _� concrete - , _ _ , .
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<br /> 2.2 REGIONAL,GEOLOGIC/HYDROGEOI;OGIC-SETTING Fi ,- s s
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<br /> The site.is located withiri the northe ri San Joaqu n,Va ley_whycli comprises.part of the-Great Valley
<br /> eomo hic rovince of California: The=San JE;eoa um Malle� is-forinedlb the Valle -�?� "�
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<br /> eo5 _cline which y5`a lar a`elon ate n6rthw s treridin as ` metrical`structuraLtrou 'h basin
<br /> g Yn g u g_ g Yin _ - g { _ }
<br /> _, _
<br />,- _ It_'is bordered byltlie Coast Ranges to the vwest, the IKiamath-Mountains and-.Cascade Range to_the i-�- r
<br /> north,:=and the Sierra;Neyada to the east phis#rough has been_filled:with='sediments derived from L''-`
<br /> s - .
<br /> _ : both marine and:continental sources. Thickness'of the sedimentar: fillanges from thin=veneers� -
<br /> "'
<br /> along the.�valley,edges`to..rnore.--than 20 OOU feet-m;the'south-central port on of the valley T1zex ��`
<br /> ' sedimentary,formations range in age with the older:deposits being prirriariIy manne'in origin and.the „�
<br /> r -. younger' deposits .lieing' prrmfth!yy.contiriental 'Continental-derived sediments =were ;'primarily p _,`,
<br />_ deposited-in lacustrine°fluvial,,and alluvial'environment.s,with'sources being the-mountain ranges {
<br /> _. '- surrounding the:valley_(Olmsted and=Davis�1961):The site islocated2on unconsolidated and semi
<br /> ,__
<br /> consolidated alluvium,alake;'playa and terz•ace_deposrts_of'Quaterriary ageY(Califoi-nia Division of a
<br /> Mines and Geoloa 1977 _ � r- _
<br /> "- ,- - 3 ' `� - v, . 3 ti7.y -. -.",' .� .-.ter -�'' xj
<br /> �-' >" The Modesto,':Riverbank and Turlock Lake Formations and;roverlying Recerit.:alluviu n ares=theme ,
<br /> . _=
<br /> 3£ k principal sources of domestic ground;.water..in the<13,500,_square rnrle San`- quin Malley Ground � _;
<br /> `�art """ 3 r Na p� � t" �A i r - _
<br /> .m _�-Water Bas.4 1in {Basin 5 22} T � � � - � � T
<br /> �. : .� ' _ 5 _ F „tom ,} .� .�,- F �, --�-;,_ a-
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<br /> `` -=- 2.3:. ' REGIO1 1.NAL GROUND WATER DEPTH:AND FLOW DIRECTION �_�-"'�j T z=
<br /> - - _it eT- . = 3' y ',"':. i ��F-'rn.- � :� '-f - ,11,1; �^ �ER�` ew...ad's -0. 7,
<br /> 3 �L '. e --- �- .,, ..sem{� — � ��� - a
<br /> The.estimated depth to giound.water-at the properfieS iS approximately SO feet below surface grade` - Aw r
<br /> - 1 . fiY 1
<br /> = . (-bsg), based,on the map_.titled Ltnes'ofEqual Depth to Groundwater Sprrng=1996 published by:theme 5,
<br /> _..San.Joaquiri County Flood Control District and Water Conservation Di"strict(FCD&WGD):The inap
<br /> 3-.:' - - _._" ._ `;� f_.: 7` .fir . r�
<br /> 3 titied.Lines.of Equal Elevation of Ground- aV&r.S.p. 1996 also published by the FCD&WCD��r r '
<br /> shows ground water'#lows.toward the.southwest to the general area of the site; ..ut„this can be greatly � c� ' ,
<br /> modified by,cliangiiig recharge,°and discharge,patterns Gs$oaZl water is considered to be surtable.for _ - i.
<br /> beneficia1 . l,use acidm. I °is used for domestic, iridustriai-and commercial u oses f �
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