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<br /> h AGE NGPro�ect No 95 01713 f� ; -' 7 7M g' fr N fs 1' :`
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<br /> ' =i aY de alis between 94 and 99 feet bs 5 and 131 and 136 feet bs' HU8 at concentratio s lesser r-= ; Y , d
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<br /> BT-EX compounds were detected in three.CPT 2,A water'samples M'depths ybetween 106 and 1y1.5 feet
<br /> s _.
<br /> �' � bsg(HU 1 1 l and 125 feet�bsg(HU7) and 136 to 140 feet bsg(HiJ9) at concentrations as;high as '
<br /> ti i- ---rt_t-4.
<br /> _. .. - ` 120µg11; the^greatest benzene concentxatran was detected in the sarriple eollec�ed between-106 ander' , , .,
<br /> ` ' — = z* :
<br /> " 115-feet bsg (HUb) at a concentration of 19µg11. = 1 .-- ���3� � .� ; _7 7 -
<br /> w_ u ce _ -_ _ '€
<br /> -k - -! pet,.- ,� _ -* —� f - f Y E T " -I *� �
<br /> = � No=other petroleum hydrocarbon:constituents were*detected by=the laboratoryanalyses.'-The 'J ,�
<br /> laboratory reports (McCampbell Analytical Inc �Lab .ID's 82292 through 82298)�and chain of
<br /> _ L. . 4
<br /> ' '- % — custody forms are presented°in Appendices B:'Analytical results -tif.I [e ground water samples are:,. Y 3
<br /> 711
<br /> _,> summarized in Table 1; analyticalresults`of CPT-="grafi' ground water samples collected m October . r , >.
<br /> .>_-- ,, •� are depicted 1n cross sectional viewssC C.= {Figures 4) �> } ,• �, 1' ,.
<br /> { v - -:-x F_ a 4 ' '.,,_.��c, - ; a _ S3 �� -� _ -� ;F -x•� -jx- s � � r. -L-- .
<br /> 3 0 � SUMMARY'A . CONCLUSIONS �-� - � � . r € � '
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<br /> Tlie implications of the October 2001 CPT iestigation�results are as`follows � ,,3g� _i ?�
<br /> • Geolo`gic.cross section C C,'was generated fzom CPT data collected at bonngs;CPT 1, Q� ��
<br /> CPT,2 and CPT 2A anti depzct_general:lithology beneath the site in cross sectional view ''
<br /> �s �. - z - -- — = , a q _ i�, - Wil. �_
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<br /> CAGE znterprets:tlie CPT dat to identify nine potential=hydrologic units between25 feet and .�
<br /> 1.� _L , .�� ': ,�g ..... .. -50 feet bsg Permeable fine to medium sand:zones:were generally encountered at depths _ #
<br /> 3 _ X38 feet to b4_feet bsg;and 341feet to 15''9 et bsg (HU,2 and HU9,.respectively)- _1� - • -
<br /> - " � _= r y
<br /> . • � Semi permeable silty sand and sandy silt:zones were-generally encounfered at cleptlis_25 feet
<br /> to-38 feet; 64 to 75 feet, 95 to i 00 feet and 112 fo 128-feet bsg (HU HU3 H.US and HU7, -
<br /> M.
<br /> y f A — � t Wr } �� �'"' "� rv- l ,.7 �r , `� - ter--
<br /> ,k 1 r- respectively r, - r �` a T, " s,,-'i�g 1-,e�� _� __ V ` -� 7-�- r F �,- r
<br /> 1- • -��- Less permeable silty lay and clayey silt_zones were generally_encountered at depths between .�, , _
<br /> L - T _ 75 feet to 95-feet bsg;,100 feet to y112 feet bsg and P28 feetto£134 feet bsg (HU4 HU6 and F �. � _
<br /> . t � L HU8 respectively) 7�� .. I„ -� :- '' =� � �x
<br /> + ,; > -., .� Rte- 4 .�" :.•, ,9- - x - "�,�" "f""�' - - x•�f r,
<br /> Zt, 3 It is not known:how effectrvely theintervernng fine.grimed'1.-intervals h droiogically separate „Mv, ., s
<br /> t -, th?e informal-hydrologic units;although laboratory analyzes of petoleum Hydrocarbon impact
<br /> w. -_ alias migrated tYtrougli or_around them GeologicFcross section C C (depicts the mformai � - is - ;
<br /> _ h Broca bon concent tions.-i neatl'the site`iii cross--
<br /> ,� 1r1_.!,-4'h,..1. ologic=unitSe . _ petroleum y u y -- -
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<br /> Signif cant,TPII G and BTEX compounds were detected:_frorn CPT'1- at y&.616 -1t.
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<br /> , J -HU7 very low concentrations of_toluene-and ulene were detected:at HUSi and.-HU8,ugure ;
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<br /> rr • � Significant TPH G and BTEX compounds were.detected froin CPT 2A at hydrologic:un�ts �
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