ETHANE
                                                                                                HEXA-
                                                                                               CHLORO-
                                                 ACRYLO-    CHLORO-     CHLORO-     ETHYL-      WATER
                                                 NITRILE    BENZENE     ETHANE     BENZENE     UNFLTRD
   WELL NUMBER     STATION   NUMBER     DATE      TOTAL      TOTAL       TOTAL      TOTAL      RECOVER
                                                 (UG/L)      (UG/L)     (UG/L)      (UG/L)      (UG/L)
                                                  34215      34301       34311      34371       34396

        1           252505080302501    1/28/98    <1.23      <.028       <.120      <.030       <.362
        2           252624080302901    1/28/98    <1.23      <.028       <.120      <.030       <.362
        3           252716080290601    1/27/98    <1.23      <.028       <.120      <.030       <.362
        4           252842080290501    1/27/98    <1.23      <.028       <.120      <.030       <.362
        5           252940080261204    1/29/98    <1.23      <.028       <.120      <.030       <.362
        6           252951080251201    1/29/98    <1.23      <.028       <.120      <.030       <.362
        7           254131080234401    2/11/98    <1.23      <.028       <.120      <.030       <.362
        8           254156080214601    2/10/98    <4.90      <.112       <.480      <.120       <1.45
        9           254201080281701    2/11/98    <4.90      <.112       <.480      <.120       <1.45
       10           254207080202201    2/10/98    <1.23      <.028       <.120      <.030       <.362
       11           254938080170902    2/9/98     <4.90      E.260       <.480      <.120       <1.45
       12           254958080171601    2/12/98    <4.90      E.045       <.480      <.120       <1.45
       13           255052080245001    3/18/98    <4.90      <.112       <.480      <.120       <1.45
       14           260053080144701    2/12/98    <4.90       0.53       <.480      <.120       <1.45
       15           260223080143301    3/16/98    <4.90      <.112       <.480      <.120       <1.45
       16           260234080211701    1/26/98    <1.23      <.028       <.120      <.030       <.362
       17           260322080162103    3/17/98    <4.90      <.112       <.480      <.120       <1.45
       18           260332080182101    3/17/98    <4.90      <.112       <.480      <.120       <1.45
       19           260539080155101    3/12/98    <4.90      <.112       <.480      <.120       <1.45
       20           260738080162701    3/9/98     <4.90      <.112       <.480      <.120       <1.45
       21           261028080154901    3/12/98    <4.90      <.112       <.480      <.120       <1.45
       22           261158080151301    3/11/98    <4.90      <.112       <.480      <.120       <1.45
       23           261404080100601    3/10/98    <4.90      <.112       <.480      <.120       <1.45
       24           261533080141101    3/11/98    <4.90      <.112       <.480      <.120       <1.45
       25           261830080073101    3/10/98    <4.90      <.112       <.480      <.120       <1.45
       26           262156080063601    1/22/98    <1.23      E.014       <.120      <.030       <.362
       27           262649080053801    1/21/98    <1.23      <.028       <.120      <.030       <.362
       28           262858080083901    1/22/98    <1.23      E.064       <.120      <.030       <.362
       29           263638080040301    1/21/98    <1.23      E.029       <.120      <.030       <.362
       30           263656080121901    1/20/98    <1.23      <.028       <.120      <.030       <.362