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. ** A* 4 <br /> EXPLANATION <br /> M , OU -4 South-1 ® Proposed soil/groundwater sampling location <br /> CPT-20 20-24 32-26 44118 Operable unit ( OU ) <br /> TPHg 120 110 100 Area of interest (AOI ) <br /> OU - 5 TPHd 1 , 100 240 380 <br /> TPHmo 1 ,400 <470 490 sample location <br /> CPT-10 20-24 or CPT-14 19-23 <br /> TPHd 74 TEQ NT NT NT NT <br /> NTPHg 31800 TRY-8 ® Previous soil sample location <br /> TPHmo <490 TPHd 31 , 000 <br /> BTEX NT TPHmo 25, 000 TRYA ® Previous soil and groundwater <br /> TEQ NT JBTEX I NT CPT-15 20-24 sample location <br /> TEQ I NT <br /> TPHg < 50 TRY-12 Previous groundwater sample location <br /> CPT-21 21 -25 TPHd <49 <br /> TPHg < 50 CPT-10 TPHmo <490 <br /> TPHd 210 BTEX NT Petroleum hydrocarbons detected <br /> TRY-18 20-24 TPHmo <470 © South -1 TEQ NT in groundwater TPH > 100 pg/L <br /> TPHd < 100 BTEX NT <br /> \ BTEX ND TEQ Nr Petroleum hydrocarbon affected soil <br /> \ . TEQ ND OU - 3 . . _ . . � noted in boring or TPH > 100 mg/kg <br /> \ CPT-11 20-24 CPT-21 CPT-14 Former Tidewater Associated Oil <br /> TPHg 19200 CPT-20 _ _ _ _ Company (TAOC ) pipeline <br /> \ \ TPHd 77,000 G-BB-OU3 <br /> \ TRY-18 <br /> TPHmo 74,000 TRY-14 Former Old Valley Pipeline (OVP ) <br /> BTEX NT <br /> CPT-1T- <br /> TRY-14B CPT-15 <br /> ' • \ ' • \ • • <br /> \ \ TEQ NTTRY-16 Groundwater flow direction <br /> , • \ • \ South -4 G-88-OU3 22 <br /> \ CPT-22 21 -25 TPH 1 ,400 <br /> \ TPHg 1 , 500 0 CPT-9 — <br /> \ TPHd 520,000 CPT-22 t TPHd 190,000 _ — ft. � ' � , <br /> \ � • , TPHmo 619000 <br /> \ TPHmo 650,000 ( South •3' • • � <br /> Benzene < 0. 5 <br /> BTEX NT / Toluene 15 - Sample ID <br /> TRY-28 ' � � • TEQ NT 00� Ethylbenzene 6.6 <br /> Sample depth interval <br /> � , i • / , Xylene 11 .2 in feet below ground <br /> � , • � ' TEQ NT surface (bgs) <br /> TRY-28 17-22 �� • ` • • • • _ TRY=6 25 27 30.32 <br /> TPHd 120 J © South-2 CPT-9 20.24 TPHd 220 J 79 J <br /> TPHd w! SG < 100 TPHg < 50 TPHd w/ SG < 100 U < 100 U <br /> BTEX ND _ _ South -6, — . :r <br /> •. ® TPHd <49 - BTEX ND ND <br /> TEQ ND - — + <br /> TPHmo <490 }.rF. � '3 TEQ ND 0. 071 <br /> INTTTT <br /> R' s BTEX NT t <br /> South=5" ; TEQ NT �6 Concentration of <br /> constituent in pg/L <br /> NA* @ b a Constituents <br /> TRY-14 TRY-14B <br /> r' t 29 4448/DUP 51 -56 1 5661 51 -66 <br /> TPHd 100 J 370 J 1420 J 100 J 82 J 1 51 J <br /> a i8 �{ TPHd w/ SG < 100 < 150 / < 150 < 100 < 100 < 100 <br /> E % a BTEX ND ND/ND ND ND ND <br /> o _la <br /> TEQ ND ND / ND ND ND I ND <br /> m - - - — -- - -- - -- - <br /> LP <br /> a V 46 Notes : <br /> 1 . TPH = total petroleum hydrocarbons . <br /> 00� _ - _ 2 . TPHg = total petroleum hydrocarbons quantified as gasoline . <br /> CD <br /> y 3 . TPHd = total petroleum hydrocarbons quantified as diesel . <br /> 4 . TPHmo = total petroleum hydrocarbons quantified as motor oil . <br /> I 5 . BTEX = benzene , toluene , ethylbenzene , and xylenes . GROUNDWATER SAMPLE ANALYTICAL DATA <br /> _ 6 . TEQ = benz(a) pyrene toxicity equivalent. TRACY RAIL YARD SOUTHERN BOUNDARY - WEST <br /> 7 . ND = not detected above the respective laboratory <br /> ' reporting limit . Tracy Rail Yard Off Site South Area <br /> E 8 . NT = not tested Tracy, California <br /> LOk 9 . < = not detected above the laboratory reporting limit shown . <br /> f Y 10 . J = target analyte was positively identified , numerical value <br /> By : JLP Date : 7/5/2011 Project No , OD11161140 <br /> 1100) 0 � �,: 9 ,00 - _ is approximate . <br /> o Feet i r ! 11 . pg/L = micrograms per liter. T - Figure <br /> V _ i AMEC Geomatrix 6 <br /> r. <br />