ETHER       ETHER      2BUTENE     METHAC-      CARBON
                                                  TERT-       TERT-      TRANS-1      RYLATE       DI.
                                                  BUTYL       PENTYL      4-DI-       ETHYL-     SULFIDE
                                                  ETHYL-     METHYL-      CHLORO      WATER       WATER
                                                 UNFLTRD     UNFLTRD     UNFLTRD     UNFLTRD      WHOLE
   WELL NUMBER     STATION   NUMBER     DATE     RECOVER     RECOVER     RECOVER     RECOVER      TOTAL
                                                  (UG/L)      (UG/L)      (UG/L)      (UG/L)      (UG/L)
                                                  50004       50005       73547       73570       77041

        1           252505080302501    1/28/98    <.054       <.112       <.692       <.278       <.080
        2           252624080302901    1/28/98    <.054       <.112       <.692       <.278       <.080
        3           252716080290601    1/27/98    <.054       <.112       <.692       <.278       <.080
        4           252842080290501    1/27/98    <.054       <.112       <.692       <.278       <.080
        5           252940080261204    1/29/98    <.054       <.112       <.692       <.278       <.080
        6           252951080251201    1/29/98    <.054       <.112       <.692       <.278       <.080
        7           254131080234401    2/11/98    <.054       <.112       <.692       <.278       <.080
        8           254156080214601    2/10/98    <.216       <.448       <2.77       <1.11       <.320
        9           254201080281701    2/11/98    <.216       <.448       <2.77       <1.11       <.320
       10           254207080202201    2/10/98    <.054       <.112       <.692       <.278       <.080
       11           254938080170902    2/9/98     <.216       <.448       <2.77       <1.11       <.320
       12           254958080171601    2/12/98    <.216       <.448       <2.77       <1.11       <.320
       13           255052080245001    3/18/98    <.216       <.448       <2.77       <1.11       <.320
       14           260053080144701    2/12/98    <.216       <.448       <2.77       <1.11       <.320
       15           260223080143301    3/16/98    <.216       <.448       <2.77       <1.11       <.320
       16           260234080211701    1/26/98    <.054       <.112       <.692       <.278       <.080
       17           260322080162103    3/17/98    <.216       <.448       <2.77       <1.11       <.320
       18           260332080182101    3/17/98    <.216       <.448       <2.77       <1.11       <.320
       19           260539080155101    3/12/98    <.216       <.448       <2.77       <1.11       <.320
       20           260738080162701    3/9/98     <.216       <.448       <2.77       <1.11       <.320
       21           261028080154901    3/12/98    <.216       <.448       <2.77       <1.11       <.320
       22           261158080151301    3/11/98    <.216       <.448       <2.77       <1.11       <.320
       23           261404080100601    3/10/98    <.216       <.448       <2.77       <1.11       <.320
       24           261533080141101    3/11/98    <.216       <.448       <2.77       <1.11       <.320
       25           261830080073101    3/10/98    <.216       <.448       <2.77       <1.11       <.320
       26           262156080063601    1/22/98    <.054       <.112       <.692       <.278       E.061
       27           262649080053801    1/21/98    <.054       E.025       <.692       <.278       <.080
       28           262858080083901    1/22/98    <.054       <.112       <.692       <.278       <.080
       29           263638080040301    1/21/98    <.054       <.112       <.692       <.278       <.080
       30           263656080121901    1/20/98    <.054       <.112       <.692       <.278       <.080