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
SITE 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          02290769     11-21-97   --      --      --       --       --
     2       252100080340000 11-20-97   --      --      --       --       --
     3       252144080313800 11-19-97   --      --      --       --       --
     4       252213080313100 11-21-97   --      --      --       --       --
     5       252414080333200 11-16-97 <.052   <.156    <.232    <.200    <.248
     5       252414080333200 11-17-97 <.052   <.156    <.232    <.200    <.248
     5       252414080333200 11-18-97 <.052   <.156    <.232    <.200    <.248
     5       252414080333200 11-19-97 <.052   <.156    <.232    <.200    <.248
     5       252414080333200 11-20-97 <.052   <.156    <.232    <.200    <.248
     6       252421080333201 11-17-97 <.026   <.078    <.116    <.100    <.124
     7       252424080333801 11-16-97 <.026   <.078    <.116    <.100    <.124
     8       252428080312700 11-18-97   --      --      --       --       --
     9       252428080312801 11-14-97 <.104   <.312    <.464    <.400    <.496
     10      252505080302501 1-28-98  <.026   <.078    <.116    <.100    <.124
     11      252523080352500 11-17-97   --      --      --       --       --
     12      252557080333700 11-19-97   --      --      --       --       --
     13      252624080302901 1-28-98  <.026   <.078    <.116    <.100    <.124
     14      252651080323001 11-13-97 <.026   <.078    <.116    <.100    <.124
     15      252700080333500 11-19-97   --      --      --       --       --
     15      252700080333500 11-20-97 <.052   <.156    <.232    <.200    <.248
     16      252716080290601 1-27-98  <.026   <.078    <.116    <.100    <.124
     17      252740080334901 11-16-97 <.026   <.078    <.116    <.100    <.124
     18      252742080334301 11-18-97 <.026   <.078    <.116    <.100    <.124
     19      252842080290501 1-27-98  <.026   <.078    <.116    <.100    <.124
     20      252845080334500 11-14-97 <.052   <.156    <.232    <.200    <.248
     20      252845080334500 11-17-97 <.052   <.156    <.232    <.200    <.248
     20      252845080334500 11-18-97 <.052   <.156    <.232    <.200    <.248
     20      252845080334500 11-19-97 <.052   <.156    <.232    <.200    <.248
     20      252845080334500 11-20-97 <.052   <.156    <.232    <.200    <.248
     21      252850080331801 11-17-97 <.026   <.078    <.116    <.100    <.124
     22      252851080323300 11-19-97   --      --      --       --       --
     22      252851080323300 11-20-97 <.052   <.156    <.232    <.200    <.248
     23      252940080261204 1-29-98  <.026   <.078    <.116    <.100    <.124
     24      252951080251201 1-29-98  <.026   <.078    <.116    <.100    <.124