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k <br /> EXPLANATION <br /> MW-2 Monitoring well location <br /> MW-1 Groundwater extraction well location i NQ <br /> DW-2r beeper monitoring well location <br /> (not used In contouring) k / <br /> MIA 0 Destroyed well location <br /> — — —°� -- Overhead electrical line(OE) i / ND <br /> fEm <br /> — — E— Electrical line(E) 9 + f ND P� � - <br /> k 180 ` <br /> Unknown utility line(?) i f ,e ND <br /> I <br /> Sanitary sewer fine(SAN) � kk /�t� r, ND /' � / / fl 50 1 ooft <br /> k21 ! <br /> --- — — w— Water line(W) <br /> — — — — Product piping line(P) kk ! ND ♦ i� +� 67Em <br /> f / <br /> Fenceline <br /> — — — — Groundwater extraction i / - T i ' 10,000 12 000 <br /> system piping i ���� f O 47 ND <br /> `7 ++ ♦ t ;% 4 1,000 / <br /> loo Benzene isoconcentration contour, � ► {� � / Q ,o �;��m. � � _` <br /> in micrograms per liter(pglL), k J / �a� ` /,' ) 1 2 <br /> dashed where inferred k� {/ f ram l/� f 5so __ 20 <br /> --Well designation f <br /> Benz. --Benzene concentrations are in L s o i / / 10- _ ae 10 , I <br /> 1 / /i k 2.3 f ® <br /> Notes: / <br /> ` o - <br /> � �� � � <br /> ND=Not detected tk I 170ND / 1'! <br /> Tm R n9` \' /Sande CYf 001 f <br /> I <br /> k / 1 A 0 <br /> 1 F00 // 1 ! // I Pinete P ope y / <br /> 1911 f , I <br /> 400 <br /> 4500 <br /> EM <br /> ND f f <br /> ND – �� , <br /> to 3.0 7 / <br /> q ND t ; ND Tosco <br /> 73 3.2 <br /> I Tnaa IFNR9" <br /> I I ` <br /> �, Figure 6 <br /> FND <br /> L_EL — ----- �' - ND Benzene in Groundwater <br /> Isoconcentration Map <br /> FND9 _ _____ August 30-31, 2010 <br /> FN Shell Stockton Terminal <br /> ' 3515 Navy Drive <br /> Stockton, California <br /> IASWR6-charsT417--1241729-Stockton 3515 Navy Drive\241 729-RE PORM241129-RPT28-3Q1 0&4Q10\241729 3QM10•BENZ,DWG(01/27/2011) <br />