METHYL  PROPENE  METHYL
                                     FREON-  TERT-     3-      ISO-
                                      113    BUTYL   CHLORO-  BUTYL   ACETONE
                                     WATER   ETHER    WATER   KETONE   WATER
                                    UNFLTRD WAT UNF  UNFLTRD WAT.WH.   WHOLE
SITE NUMBER STATION   NUMBER  DATE    REC     REC    RECOVER  TOTAL    TOTAL
                                     (UG/L)  (UG/L)  (UG/L)   (UG/L)  (UG/L)
                                    (77652) (78032)  (78109) (78133)  (81552)

     1          02290769     11-21-97   --      --      --       --      --
     2       252100080340000 11-20-97   --      --      --       --      --
     3       252144080313800 11-19-97   --      --      --       --      --
     4       252213080313100 11-21-97   --      --      --       --      --
     5       252414080333200 11-16-97 <.064   <.224    <.392   <.748    <9.81
     5       252414080333200 11-17-97 <.064   <.224    <.392   <.748    <9.81
     5       252414080333200 11-18-97 <.064   <.224    <.392   <.748    <9.81
     5       252414080333200 11-19-97 <.064   <.224    <.392   <.748    <9.81
     5       252414080333200 11-20-97 <.064   <.224    <.392   <.748    <9.81
     6       252421080333201 11-17-97 <.032   <.112    <.196   <.374    <4.90
     7       252424080333801 11-16-97 <.032   <.112    <.196   <.374    <4.90
     8       252428080312700 11-18-97   --      --      --       --      --
     9       252428080312801 11-14-97 <.128   <.448    <.784   <1.50    <19.6
     10      252505080302501 1-28-98  <.032   0.141    <.196   <.374    <4.90
     11      252523080352500 11-17-97   --      --      --       --      --
     12      252557080333700 11-19-97   --      --      --       --      --
     13      252624080302901 1-28-98  <.032   E.040    <.196   <.374    <4.90
     14      252651080323001 11-13-97 <.032   <.112    <.196   <.374    <4.90
     15      252700080333500 11-19-97   --      --      --       --      --
     15      252700080333500 11-20-97 <.064   <.224    <.392   <.748    <9.81
     16      252716080290601 1-27-98  <.032   <.112    <.196   <.374    <4.90
     17      252740080334901 11-16-97 <.032   <.112    <.196   <.374    <4.90
     18      252742080334301 11-18-97 <.032   <.112    <.196   <.374    <4.90
     19      252842080290501 1-27-98  <.032   <.112    <.196   <.374    <4.90
     20      252845080334500 11-14-97 <.064   <.224    <.392   <.748    <9.81
     20      252845080334500 11-17-97 <.064   <.224    <.392   <.748    <9.81
     20      252845080334500 11-18-97 <.064   <.224    <.392   <.748    <9.81
     20      252845080334500 11-19-97 <.064   <.224    <.392   <.748    <9.81
     20      252845080334500 11-20-97 <.064   <.224    <.392   <.748    <9.81
     21      252850080331801 11-17-97 <.032   <.112    <.196   <.374    <4.90
     22      252851080323300 11-19-97   --      --      --       --      --
     22      252851080323300 11-20-97 <.064   <.224    <.392   <.748    <9.81
     23      252940080261204 1-29-98  E.060   E.047    <.196   <.374    <4.90
     24      252951080251201 1-29-98  E.011   E.040    <.196   <.374    <4.90