CIS-1,2
                                                   ACETATE      -DI-     2-HEXA-                  O-
                                                    VINYL      CHLORO-     NONE                 XYLENE
                                                    WATER      ETHENE     WATER                 WATER
                                                   UNFLTRD      WATER     WHOLE     STYRENE     WHOLE
   WELL NUMBER      STATION   NUMBER      DATE     RECOVER      TOTAL     TOTAL      TOTAL      TOTAL
                                                    (UG/L)     (UG/L)     (UG/L)     (UG/L)     (UG/L)
                                                    77057       77093     77103      77128      77135

        1            252505080302501    1/28/98       --        <.038     <.746      <.042      <.064
        2            252624080302901    1/28/98       --        <.038     <.746      <.042      <.064
        3            252716080290601    1/27/98       --        <.038     <.746      <.042      <.064
        4            252842080290501    1/27/98       --        <.038     <.746      <.042      <.064
        5            252940080261204    1/29/98       --        <.038     <.746      <.042      <.064
        6            252951080251201    1/29/98       --        <.038     <.746      <.042      <.064
        7            254131080234401    2/11/98       --        <.038     <.746      <.042      <.064
        8            254156080214601    2/10/98       --        <.152     <2.98      <.168      <.256
        9            254201080281701    2/11/98       --        <.152     <2.98      <.168      <.256
        10           254207080202201    2/10/98       --        0.111     <.746      <.042      <.064
        11           254938080170902     2/9/98       --        E.240     <2.98      <.168      <.256
        12           254958080171601    2/12/98       --        E.320     <2.98      <.168      <.256
        13           255052080245001    3/18/98       --        <.152     <2.98      <.168      <.256
        14           260053080144701    2/12/98       --        E.240     <2.98      <.168      <.256
        15           260223080143301    3/16/98       --        E.086     <2.98      <.168      <.256
        16           260234080211701    1/26/98       --        E.007     <.746      <.042      <.064
        17           260322080162103    3/17/98       --        <.152     <2.98      <.168      <.256
        18           260332080182101    3/17/98       --        <.152     <2.98      <.168      <.256
        19           260539080155101    3/12/98       --        <.152     <2.98      <.168      <.256
        20           260738080162701     3/9/98       --        <.152     <2.98      <.168      <.256
        21           261028080154901    3/12/98       --        E.042     <2.98      <.168      <.256
        22           261158080151301    3/11/98       --        0.978     <2.98      <.168      <.256
        23           261404080100601    3/10/98       --        <.152     <2.98      <.168      <.256
        24           261533080141101    3/11/98       --        <.152     <2.98      <.168      <.256
        25           261830080073101    3/10/98       --        <.152     <2.98      <.168      <.256
        26           262156080063601    1/22/98       --        E.033     <.746      <.042      <.064
        27           262649080053801    1/21/98       --        E.010     <.746      <.042      <.064
        28           262858080083901    1/22/98       --        E.009     <.746      <.042      <.064
        29           263638080040301    1/21/98       --        0.107     <.746      <.042      <.064
        30           263656080121901    1/20/98       --        <.038     <.746      <.042      <.064