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<br /> 15:July 2004 � �� - x 'F � : , a
<br /> U. AGE�NC�Pro�ect Na. 98 0540 . K _"��� #� A-- l � 1 , t F.
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<br /> " y0y Ground water;samples for:appropriate EPA analyses will be collected into 40'ml volatile organic ti
<br /> -, analysis:(V OA) vials containing 0 S-ml�af:hydrochloric acid5as a sample preserv_at�ver s s T
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<br /> - After,collection;-the samples:will be aI 11ppropriately labeled and placed on ice and kept.m a cooler .
<br /> J; . until delivered-to the 1`aboratory for analy is�Cham"of custody protocols will be�used,to document k m. P
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<br /> ` a :_ - saMple custody transfeir from the field to the anal�t�cal laborato _;A`chain of custody 1.form±will : r`= �y
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<br /> '� The proposed scjll boring`1'ocatlon is illustraed in Figure 2: Following :borehole advancement', E
<br /> `� > .portlarid':cement {grout mix) will-be utilized to backfill the lioreliole from�tatal�depth utilizing a, _�� ; * 'v
<br /> Y 6anr down Bole treirimle pipe The EHD will4be given a 48 hour�nspecflon notice ta;insp1.ect the grout Y
<br /> W' mix and backfilling activ�tles� � J
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<br /> ` �� 4 2., MONITORING WELL PILOT BORING ADVANCEMENT , � , x . y �,
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<br />- � _L Proposed malirtoring well b11orings�wlll be completed using;hollow,stem auger r'im- g_techrt�ques
<br /> x `_ � -_` Relatively u- isturb6d soil samples,will be collected�at five foot intervals in each'of the boric.. for fi
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<br /> lithiolagieal description only,°using a Callfornla modified spirt-spoon sampler'. __ :with 2=►nch!� , - h
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<br /> `� diameter,-6-inchJlong brasssleeves Upon removal from the,5amole'r,the,exposed"ends of the center ,
<br /> ,t , `�`. slee've..wlll be:covered_wdh Teflon:.sheets; capped an,, sealed with tape Soils encountered in the `
<br /> t w r' borings _will,be visually classified-by ah SAGE geologist n accordance wk fI the Unified So11 s11- �,tr
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<br /> min _`` Classification.5ystem--(USCS)rAdd:i ionally, so,1l samples will be field screened=for theypresence of -=�s.�
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<br /> �; ,, #+ Following sample'collection;=each preser ved sam,p e sleeve uvill be labeled:w the boring ioeat on;'. r r;_
<br /> depth,time,;date and=sampler's Initials Appropriately sealed-and Labeled samples will be placed �n „ -
<br /> J a chilled container under ice` �� � '�r, _ - x �. w� e :
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<br /> a _� Followirig completion; of dr�lling of each pilot boring, a 2 inch diameter Schedule X40 `PVC =� ,T
<br /> _: ; °.-0.020 Inch slotted welCscreen and casmgwill he installed A-20 foot section of1.well screen will be_ - "
<br /> I in each well;extendin a roxiinn aatel _15 feet below-and 5 feet above lie top of the ground€r
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<br /> K '4 water table , - 4w. �4 Yom- L a �� -j^ d s. _ $6 - i s 3_ 3 s
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<br /> � z, 1_.i. The weil-casing;;f lter�pack and sealing rnaterlals will be placed Into the boiehole through_the interior s t ' �7
<br /> j4 ''¢ r, of"the hollow`stem -'augers 'After``nstaling�tlie wellcasing;filter�pack�material consstFngiaflk$c
<br /> # pre-washed#2/12 Lonestar:sand will be added from the bottom of the boreholeto approximately4wo -_ -, _
<br /> "� ' '-feet above the screened interval - `' ,� t ' `>' 'ms s
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