ISO-          BENZENE    O-
                                        BENZENE PROPYL- BENZENE 135-TRI CHLORO-
                                        124-TRI BENZENE N-PROPY  METHYL TOLUENE
                                         METHYL  WATER   WATER   WATER   WATER
                                         UNFILT  WHOLE  UNFLTRD UNFLTRD  WHOLE
 SITE NUMBER   STATION   NUMBER   DATE  RECOVER   REC     REC     REC    TOTAL
                                         (UG/L)  (UG/L)  (UG/L)  (UG/L)  (UG/L)
                                        (77222) (77223) (77224) (77226) (77275)

      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 <.112   <.064   <.084   <.088   <.084
      5        252414080333200  11-17-97 <.112   <.064   <.084   <.088   <.084
      5        252414080333200  11-18-97 <.112   <.064   <.084   <.088   <.084
      5        252414080333200  11-19-97 <.112   <.064   <.084   <.088   <.084
      5        252414080333200  11-20-97 <.112   <.064   <.084   <.088   <.084
      6        252421080333201  11-17-97 <.056   <.032   <.042   <.044   <.042
      7        252424080333801  11-16-97 <.056   <.032   <.042   <.044   <.042
      8        252428080312700  11-18-97   --      --      --      --      --
      9        252428080312801  11-14-97 <.224   <.128   <.168   <.176   <.168
      10       252505080302501  1-28-98  <.056   <.032   <.042   <.044   <.042
      11       252523080352500  11-17-97   --      --      --      --      --
      12       252557080333700  11-19-97   --      --      --      --      --
      13       252624080302901  1-28-98  <.056   <.032   <.042   <.044   <.042
      14       252651080323001  11-13-97 <.056   <.032   <.042   <.044   <.042
      15       252700080333500  11-19-97   --      --      --      --      --
      15       252700080333500  11-20-97 <.112   <.064   <.084   <.088   <.084
      16       252716080290601  1-27-98  <.056   <.032   <.042   <.044   <.042
      17       252740080334901  11-16-97 <.056   <.032   <.042   <.044   <.042
      18       252742080334301  11-18-97 <.056   <.032   <.042   <.044   <.042
      19       252842080290501  1-27-98  <.056   <.032   <.042   <.044   <.042
      20       252845080334500  11-14-97 <.112   <.064   <.084   <.088   <.084
      20       252845080334500  11-17-97 <.112   <.064   <.084   <.088   <.084
      20       252845080334500  11-18-97 <.112   <.064   <.084   <.088   <.084
      20       252845080334500  11-19-97 <.112   <.064   <.084   <.088   <.084
      20       252845080334500  11-20-97 <.112   <.064   <.084   <.088   <.084
      21       252850080331801  11-17-97 <.056   <.032   <.042   <.044   <.042
      22       252851080323300  11-19-97   --      --      --      --      --
      22       252851080323300  11-20-97 <.112   <.064   <.084   <.088   <.084
      23       252940080261204  1-29-98  <.056   <.032   <.042   <.044   <.042
      24       252951080251201  1-29-98  <.056   <.032   <.042   <.044   <.042