1,1-DI      2,2-DI                              BENZENE
                                                  CHLORO-    CHLORO-     1,3-DI-     TOLUENE      123-TRI
                                                   PRO-        PRO-      CHLORO-     O-ETHYL      METHYL-
                                                   PENE,       PANE      PROPANE      WATER        WATER
                                                  WAT, WH    WAT, WH     WAT. WH     UNFLTRD      UNFLTRD
   WELL NUMBER     STATION   NUMBER      DATE      TOTAL      TOTAL       TOTAL      RECOVER      RECOVER
                                                  (UG/L)      (UG/L)      (UG/L)      (UG/L)      (UG/L)
                                                   77168      77170       77173       77220        77221

        1           252505080302501    1/28/98     <.026      <.078       <.116       <.100        <.124
        2           252624080302901    1/28/98     <.026      <.078       <.116       <.100        <.124
        3           252716080290601    1/27/98     <.026      <.078       <.116       <.100        <.124
        4           252842080290501    1/27/98     <.026      <.078       <.116       <.100        <.124
        5           252940080261204    1/29/98     <.026      <.078       <.116       <.100        <.124
        6           252951080251201    1/29/98     <.026      <.078       <.116       <.100        <.124
        7           254131080234401    2/11/98     <.026      <.078       <.116       <.100        <.124
        8           254156080214601    2/10/98     <.104      <.312       <.464       <.400        <.496
        9           254201080281701    2/11/98     <.104      <.312       <.464       <.400        <.496
       10           254207080202201    2/10/98     <.026      <.078       <.116       <.100        <.124
       11           254938080170902     2/9/98     <.104      <.312       <.464       <.400        <.496
       12           254958080171601    2/12/98     <.104      <.312       <.464       <.400        <.496
       13           255052080245001    3/18/98     <.104      <.312       <.464       <.400        <.496
       14           260053080144701    2/12/98     <.104      <.312       <.464       <.400        <.496
       15           260223080143301    3/16/98     <.104      <.312       <.464       <.400        <.496
       16           260234080211701    1/26/98     <.026      <.078       <.116       <.100        <.124
       17           260322080162103    3/17/98     <.104      <.312       <.464       <.400        <.496
       18           260332080182101    3/17/98     <.104      <.312       <.464       <.400        <.496
       19           260539080155101    3/12/98     <.104      <.312       <.464       <.400        <.496
       20           260738080162701     3/9/98     <.104      <.312       <.464       <.400        <.496
       21           261028080154901    3/12/98     <.104      <.312       <.464       <.400        <.496
       22           261158080151301    3/11/98     <.104      <.312       <.464       <.400        <.496
       23           261404080100601    3/10/98     <.104      <.312       <.464       <.400        <.496
       24           261533080141101    3/11/98     <.104      <.312       <.464       <.400        <.496
       25           261830080073101    3/10/98     <.104      <.312       <.464       <.400        <.496
       26           262156080063601    1/22/98     <.026      <.078       <.116       <.100        <.124
       27           262649080053801    1/21/98     <.026      <.078       <.116       <.100        <.124
       28           262858080083901    1/22/98     <.026      <.078       <.116       <.100        <.124
       29           263638080040301    1/21/98     <.026      <.078       <.116       <.100        <.124
       30           263656080121901    1/20/98     <.026      <.078       <.116       <.100        <.124