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Mr. Allen Sorenson <br />January 30, 2002 <br />Page 2 <br />ENV003.02 <br />Table 1 -Comparison of Numeric Protective Levels (NPL) and Early Warning Indicators (EWI)* <br /> <br />Well <br />I.D. <br />~~ <br />parameter <br />Value <br />NPL <br />ElA/I <br />Reg_ 41 <br />Standard <br />Standard <br />Qassification <br />Baseline <br />Mean Subsequent <br />Monitoring <br />Period <br />ResuR <br />21110 10/15/01 Barium 5.43 None 5.29 2 Human Health `.i 077 4 I4 <br />21-40 12/10/01 Phos horus 0.9 None 0.8 None None 0.662 Unknown <br />21-3U 10/18/01 Barium 4.79 4.66 None 2 Human Health 4.204 3.77 <br />21-3U 10/18/01 Fluoride 43.5 25 None 2 A ricultural 23.4 19 <br />21 ~A 11 / 13/01 Phos horus 3.05 2. B None None None 1.983 2.4 <br />21-4A 1?/1f)/(1'1 L'hloride 630 None 670 250 2 Drinking <br />Water /~!1 Unknown <br />21 ~tA 10/ 15/01 Phos horus 4.0 None 1.1 None None 0.948 1.2 <br />21-4A 11 / 12/01 Phos horus 1.2 None 1.1 None None 0.948 1.1 <br />29-3 11/16/01 Barium 3.42 None 3.4 2 Human Health 2.994 2.94 <br />19-2 10/17/01 Barium 3.43 None 2.35 2 Human Health 1.992 3.13 <br />19-2 11 / 15/01 Barium 3,13 None 2.35 2 Human Health 1.992 2.71 <br />19-2 12/18/01 Barium 2.71 None 2.35 2 Human Health 1.992 Unknown <br />211}8 10/ 16/01 Phos horus 13.7 None 5 None None 3.403 2.2 <br />20-9 10/22/01 Chloride 400 None 390 250 2' Drinking <br />Water 321 400 <br />209 11 /26/01 Chlorrde 400 None 390 250 2 Drinking <br />Water 321 350 <br />Values highlighted in green in the above table are elevated above the numeric protective levels at <br />compliance points. Please refer to the attached graphs of each of these constituents at these <br />locations. <br />The barium concentration at Well 19-2 remains consistently above the early warning <br />indicator value. As data for this well is evaluated, it may be important to consider that <br />during the core drilling of this well the drilling rig burned as a result of natural gas. Various <br />materials were used during the emergency situation to help stem the flow of gas fueling the <br />fire. It is likely that barium in this well is resultant from possible residual barium containing <br />materials used down hole to curtail the escaping gas. A graph of barium concentration <br />versus water elevation for Well 19-2 is also included for your reference. <br />American Soda is required to sample well field injection and production streams for water <br />quality chemical constituents. These samples were collected during the quarter and this <br />data is provided to you in tables as a separate attachment. The injection and production <br />stream data is clearly marked as Confidential Business Information. <br />Should you have any questions or comments regarding this information, please contact me <br />at (970) 285-0407 or Celina Akin at (970) 285-0406. <br />