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30-Jan-03 <br /> LOrtho _ @ m o <br /> Mattress Jack In The Box California Bagel Co ' EXPLANATION 2 `" <br /> { r- <br /> Groundwater monitoring well Q a`) <br /> V .2 <br /> + E <br /> Vapor extraction well, <br /> PORTER AVENUE i Groundwater elevation contour in feet v Z <br /> y referenced to mean sea level (ft msl) C C <br /> MW-2 Arrows indicate approximate V O <br /> -2323 MW-1 I groundwater flow direction L V <br /> ( 0)(<5 0 (<0 50) -1971 I Groundwater elevation in ft msl <br /> ?`9 W- <br /> m _ <br /> Former (c5 O) E <br /> r Dispenser t (6 4) $enzene concentration m p b <br /> UST Islands Existing _ _ <br /> (7 6) MTBE concentration in ppb by C <br /> Location USTs EPA Method 8260 ,,• <br /> �~ e - - <br /> _ - - 0 <br /> (<5 0/<5 0,03-Sep-02)Benzene/MTBE concentrations m ppb, <br /> date sampled <br /> MW-5 VEW-1 <br /> m <br /> -2290 &,-9969 Parking Lot s q-(�u tdni�: Not detected at reporting limit x <br /> (4 2) (1,200) Ica:] <br /> __mm W �o <br /> Approx mate hydraulic gradient=0 003 <br /> (<S 0) (<250) <br /> Can a - P <br /> = 49z= m Note W-2 not used in contouring <br /> 7-60 .-v ............. 1 <br /> MW-3 MW-4 <br /> 2311 <br /> -2337 <br /> (<0 50) (2 8) t/] Q <br /> m (<s 0) 11) _ <br /> V <br /> Parking Lot a � <br /> 1 Iffy-6 W t� <br /> -23.23 <br /> (9 3), MW-8 Q <br /> (<S 0) -2370 <br /> <0 50) <br /> Verizon U <br /> ( <br /> wifeless <br /> Parking <br /> Petco <br /> Parking Lot <br /> MW-7 <br /> -2330 <br /> (1,900) <br /> N G <br /> MW-1 ZMW-9 <br /> -22.98 �,, I + -23.74 <br /> (<0.50) a r w N (15) Cl) <br /> (<5 0) ( ) <br /> 1 ij 05 �' <S 0 v <br /> - MW-10 c J Marengo Scale (ft) •� <br /> NM Parking Lot Genter <br /> (<5 01<5 0,03-Sep-02) W (St.rip Mall) 0 30 60 120 Cl) <br /> Strip Mall <br /> Payless d :03 ca <br /> tm Storage <br /> ZI C ¢ � <br /> ti Ucav <br /> FIGURE y <br /> 4, �' `n CL o <br /> AIleyway - 2 <br /> F <br /> Lnf <br />