Table 1. Summary of 2002 accuracy data for QC solutions.

> NOMINAL ACTUAL NET MEAN
>
> ANALYTE UNITS VALUE VALUES n BIAS %
>
> CLPH SU 4.70 4.70 0.02 96 0.07
>
> EQPH SU 4.70 4.70 0.01 216 0.07
>
> ANC µeq/L 40 39.6 1.91 96 -1.02
>
> DIC mg/L C 5.00 5.05 ± 0.16 107 0.98
>
> DOC mg/L C 5.00 5.00 ± 0.14 226 0.00
>
> COLOR PCU 10.0 10.08 0.51 196 0.77
>
> COND (Jan to Mar) µS/cm 10 9.69 0.18 13 -3.15
>
> COND (Apr to Dec) µS/cm 23.8 24.03 ± 0.55 110 0.97
>
> Ca mg/L 1.00 0.98 0.05 272 -2.00
>
> Mg mg/L 1.00 1.00 0.05 272 -0.18
>
> Na mg/L 1.00 1.00 0.05 272 0.25
>
> K mg/L 1.00 0.99 0.05 272 -1.06
>
> Cl µeq/L 50.0 48.5 1.91 214 -2.97
>
> NO3 µeq/L 25.0 24.72 0.80 214 -1.13
>
> SO4 µeq/L 50.0 48.7 1.76 214 -2.54
>
> Total P µg/L 57.2 56.9 3.25 110 -0.47
>
> Total N mg/L 0.559 0.546 ± 0.01 117 -2.38
>
> Si mg/L 2.09 2.09 ± 0.06 134 0.20
>
> NH4 mg/L 0.54 0.55 ± 0.02 111 2.37
>
> Al µg/L 200.0 199.1 8.54 278 -0.44

Table 2. Summary of data for field blanks.

  -------------------------- ----------- ---------------- ----------- -----
  Variable                   Median      Range            QA          n
                                                          Objective   

  PH, equilibrated           NA          NA               NA          NA

  PH, ARAS                   NA          NA               NA          NA

  ANC (µeq/L)                0           -13 to 6         10          11

  Conductivity (µS/cm)       1.71        0.58 to 2.3      4           11

  DOC (mg/L)                 0.38        0.38 to 0.38     0.2         1

  DIC (mg/L)                 NA          NA               NA          NA

  Al, total dissolved (µg/L) 1.40        0 to 3.4         10          11

  Ca (mg/L)                  0.02        0 to 0.03        0.02        11

  Mg (mg/L)                  0.00        0 to 0           0.02        11

  Na (mg/L)                  0.01        0 to 0.05        0.02        11

  K (mg/L)                   0.02        0.01 to 0.05     0.02        11

  NH~4~ (mg/L)               0.01        0 to 0.03        0.05        11

  Cl (µeq/L)                 1.6         0.4 to 3.2       1.0         11

  NO~3~ (µeq/L)              0           0 to 0.2         0.2         11

  SO~4~ (µeq/L)              0.7         0 to 1.4         2.0         11

  Total P                    NA          NA               NA          NA

  Total N (mg/L)             0.009       0 to 0.024       0.050       11

  Si (mg/L)                  0           0 to 0.03        0.1         11

  Apparent Color (PCU)       0           0 to 4           0           11

  Chla                       NA          NA               NA          NA
  -------------------------- ----------- ---------------- ----------- -----

Table 3. Itemization of sample blank QC violations defined as two times
the MDL.

  ---------- -------- -------- -------- --------- --------- --------- ---------
  Date       Ca       K (mg/L) Na       Cl        NO~3~     Al Org    DOC
             (mg/L)            (mg/L)   (µeq/L)   (µeq/L)   (µg/L)    (mg/L)

  1/9/02                                2.5                           

  1/24/02                               1.4                           

  2/6/02                                1.4                           0.33

  2/13/02             0.03              1.5                           0.30

  2/20/02                               1.4                           

  2/28/02                               1.3                           0.28

  3/5/02              0.03              1.3                           

  3/13/02             0.03              1.1                           

  3/17/02                               1.3                           

  3/20/02             0.03              1.8                           

  3/27/02             0.03              1.5                           0.25

  4/5/02                                                              0.32

  4/17/02             0.03              1.6                           0.25

  5/14/02             0.03                                            

  5/19/02                                         0.2                 0.22

  5/22/02             0.03                                            

  5/29/02             0.03                        0.2                 

  6/6/02              0.03                                            

  6/11/02             0.03                                            0.33

  7/6/02                                1.5                           0.29

  7/24/02                               1.2                           

  7/30/02                               1.7                           

  8/1/02                                1.7                           

  8/6/02                                1.2                           

  8/8/02                                1.1                           

  8/14/02    0.03     0.03              1.2                           

  8/20/02    0.03                       1.7                           0.23

  8/27/02    0.03                       1.2                           0.25

  8/28/02                                                             0.32

  9/2/02     0.03     0.03              1.2                 16.1      0.23

  9/8/02              0.03              1.7                           

  9/18/02             0.03     0.04                                   

  9/24/02                               1.1                           0.29

  9/26/02             0.03     0.04     2.1                           0.28

  9/30/02             0.03     0.03     1.1                           

  10/1/02                                                             0.31

  10/9/02                               1.4                           

  10/15/02                                                            0.24

  10/21/02                              1.1                           

  10/28/02            0.03     0.04     1.5       0.4                 0.25

  10/30/02            0.03              1.5                           0.24

  11/12/02                                                            0.25

  11/17/02                                                            0.35

  11/23/02                                                            0.74

  11/26/02                                                            0.79

  12/11/02                              1.6                           

  12/17/02                              1.2                           0.66

  12/22/02                              1.5                           

  12/27/02                                                            
  ---------- -------- -------- -------- --------- --------- --------- ---------

**NOTE:** DOC values in red represent those samples filtered through a
glass 0.7 µm filter. Values in black

Represent those samples filtered through a 0.4 µm filter.

Table 4. Summary of precision data for field replicates.

  ------------------------------- -------- -------------- ----------- -----
  Variable                        Median   Range          QA          n
                                                          Objective   

  pH, closed cell (values 5.74)   0.01     -0.09 to .17   0.075       31

  pH, closed cell (values 5.74)   0.01     -0.12 to 0.15  0.15        35

  pH, equilibrated (values 5.74)  -0.01    -0-04 to 0.01  0.075       21

  pH, equilibrated (values 5.74)  -0.01    -0.18 to 0.07  0.15        45

  ANC (values 100 µeq/L)          0.1      -26.9 to 3.7   5 µeq/L     59

  ANC (values 100 µeq/L)          0.65%    0 to 2.05%     5%          7

  Conductivity (values 50uS/cm)   0        -1.6 to 1.3    1 uS/cm     61

  Conductivity (values 50uS/cm)   0.47%    0.24 to 0.60%  2%          5

  DOC (values 2 mg/L)             0.02     -0.13 to 0.16  0.1 mg/L    19

  DOC (values 2 mg/L)             1.59%    0 to 19.9%     5%          47

  DIC (values 2 mg/L)             0        -2.4 to 0.2    0.1 mg/L    57

  DIC (values 2 mg/L)             2.89%    1.26 to 4.16%  5%          5

  Al, total dissolved (values 100 0.2      -6.2 to 6.9    10 µg/L     25
  µg/L)                                                               

  Al, total dissolved (values 100 1.18%    0 to 6.2%      10%         32
  µg/L)                                                               

  Ca (values 0.4 mg/L)            0.01     0.01 to 0.01   0.02 mg/L   1

  Ca (values 0.4 mg/L)            0.99%    0 to 11.9%     5%          65

  Mg (values 0.2 mg/L)            0.01     0 to 0.01      0.01 mg/L   2

  Mg (values 0.2 mg/L)            0.50%    0 to 10.4%     5%          64

  Na (mg/L)                       1.43%    0 to 15.0%     5%          66

  K (values 0.8 mg/L)             0        -0.08 to 0.11  0.04 mg/L   62

  K (values 0.8 mg/L)             2.74%    1.64 to 4.36%  5%          4

  NH~4~ (mg/L)                    0        -0.02 to 0.02  0.02 mg/L   65

  Cl (values 20 µeq/L)            0        -2 to 8.5      1.0 µeq/L   10

  Cl (values 20 µeq/L)            0.63%    0 to 6.7%      5%          56

  NO~3~ (values 10 µeq/L)         0        -0.6 to 0.3    0.5 µeq/L   58

  NO~3~ (values 10 µeq/L)         0.26%    -0.2 to 0.54%  5%          8

  SO~4~ (ueq/L)                   0%       0 to 2.9%      5%          66

  Total P (µg/l)                  0.3      -3 to 7        1 µg/L      33

  Total N (mg/l)                  2.58%    0 to 68%       5%          42

  Si (values 1 mg/L)              0        -0.07 to 0.05  0.05 mg/L   21

  Si (values 1 mg/L)              0%       0 to 23%       5%          45

  True Color (values 50 PCU)      0        -3 to 2        5 PCU       58

  True Color (values 50 PCU)      0%       0 to 0%        10%         5
  ------------------------------- -------- -------------- ----------- -----

Table 5. Itemization of field replicate precision violations.

  ---------------- ------------ ------------ ---------------- ------------
  Site             Sample Date  Analyte      Duplicate Values Precision

  Gould            10-23-02     DOC          5.26, 4.65       8.71%

  Gould            10-23-02     Total P      17, 15           2.00 µg/L

  Gould            10-23-02     Total N      0.35, 0.378      5.44%

  Black            10-27-02     DIC          2, 1.8           0.20 mg/L

  Black            10-27-02     Total P      10, 7.1          2.90 µg/L

  SANDB            11-16-02     Ca           1, 0.93          5.13%

  SANDB            11-16-02     DOC          4.29, 3.99       5.12%

  SANDB            11-16-02     Total P      17, 10           7.00 µg/L

  Hamil            11-20-02     Total N      0.25, 0.182      22.26%

  Rock Pond        10-9-02      Na           0.88, 0.75       11.28%

  Rock Pond        10-9-02      K            0.4, 0.33        0.07 mg/L

  Rock Pond        10-9-02      Cl           13, 10           3.00 µeq/L

  Greenwood Pd     10-9-02      Ca           0.5, 0.43        10.64%

  Greenwood Pd     10-9-02      DOC          1.89, 2.11       7.78%

  CB1              1-24-02      Ca           0.89, 0.96       5.35%

  CB1              1-24-02      Mg           0.35, 0.38       5.81%

  CB1              2-20-02      Total N      0.023, 0.028     13.86%

  HB1              3-6-02       ClpH         5.48, 5.57       -0.09

  CB1              3-13-02      ClpH         5.66, 5.57       0.09

  CB1              3-13-02      DIC          0.7, 0.9         -0.02 mg/L

  CB1              3-13-02      Total N      0.07, 0.053      19.55%

  HB1              4-24-02      Total P      2.5, 1.1         1.40 µg/L

  HB1              5-29-02      ANC          41.1, 68         -26.90 µeq/L

  HB1              5-29-02      Ca           1.47, 1.74       11.90%

  HB1              5-29-02      Mg           0.44, 0.51       10.42%

  HB1              5-29-02      K            0.25, 0.3        -0.05 mg/L

  HB1              5-29-02      EqpH         6.83, 7.01       -0.18

  HB1              5-29-02      Si           2.8, 3.9         23.22%

  HB1              5-29-02      Total N      0.054, 0.153     67.64%

  CB1              6-19-02      Total N      0.077, 0.098     16.97%

  HB1              7-6-02       Ca           1.89, 2.05       5.74%

  HB1              7-6-02       Mg           0.55, 0.6        6.15%

  HB1              7-6-02       DIC          1.1, 3.5         -2.40 mg/L

  HB1              7-6-02       Total P      2.7, 4.2         -1.50 µg/L

  HB1              7-6-02       Total N      0.12, 0.168      23.57%

  Salmon E         11-4-02      DIC          1.6, 1.4         0.20 mg/L

  Newbert E        7-24-02      Si           0.86, 0.93       -0.07 mg/L

  Abol E           7-31-02      DOC          2.08, 2.76       19.87%

  Abol             10-15-02     Cl           20, 22           6.73%

  Bean E           8-1-02       Cl           12, 14           -2.00 µeq/L

  Bean E           8-1-02       DIC          0.9, 0.7         0.20 mg/L

  Bracey E         5-16-02      K            0.3, 0.24        0.06 mg/L

  Crystal E        8-5-02       ClpH         5.44, 5.27       0.17

  Abol O           4-18-02      DIC          1.7, 2           -0.30 mg/L

  Abol O           4-18-02      Total P      9.5, 5.2         4.30 µg/L

  Bean O           4-30-02      Cl           19, 16.6         2.40 µeq/L

  Bean O           4-30-02      Total P      13, 9.7          20.56%

  Bean O           5-6-02       Total N      0.235, 0.262     7.68%

  Mud O            3-4-02       K            0.41, 0.36       0.05 mg/L

  Mud O            3-4-02       DIC          0.5, 0.7         -0.20 mg/L

  Mud O            3-4-02       Total N      0.169, 0.149     8.89%

  Mud O            3-28-02      DOC          4.92, 4.53       5.84%

  Mud O            3-28-02      Sp Cond      33.50, 35.00     -1.50 µS/cm

  Partridge O      4-22-02      DIC          0.6, 0.8         -0.20 mg/L

  Wiley O          3-11-02      Sp Cond      28.00, 29.60     -1.60 µS/cm

  Round Pond       7-15-02      DIC          1.4, 1.6         -0.20 mg/L

  Miller           9-2-02       Na           0.99, 0.8        15.01%

  Miller           9-2-02       K            0.29, 0.18       0.11 mg/L

  Miller           9-2-02       Cl           18, 9.5          8.50%

  Miller           9-2-02       Sp Cond      20.1, 18.8       1.30 µS/cm

  Round            9-2-02       DIC          1.6, 2           -0.40 mg/L

  Baker            6-6-02       K            0.37, 0.45       -0.08 mg/L

  Baker            6-6-02       Cl           38, 41           5.37%

  Baker            6-6-02       NO~3~        0, 0.6           -0.60 µeq/L

  EB8              4-5-02       DOC          2.36, 2.15       6.59%

  EB8              4-5-02       Total N      0.094, 0.081     10.51%

  EB8              4-30-02      DOC          2.04, 1.88       5.77%

  EB8              4-30-02      Total P      1.4, 4.4         -3.00 µg/L

  EB8              4-30-02      Total N      0.085, 0.075     8.84%

  EB8              5-28-02      DOC          2.08, 1.9        6.40%

  EB8              5-28-02      Total P      4.7, 2.2         2.50 µg/L

  WB3              2-5-02       Total P      3.1, 2           1.10 µg/L

  WB3              2-26-02      Total P      1.1, 3           -1.90 µg/L

  WB3              3-20-02      Total P      4.4, 2           2.40 µg/L

  WB3              5-14-02      DOC          1.93, 1.77       0.16 mg/L

  WB3              5-14-02      Total N      0.181, 0.219     13.44%

  WB3              6-11-02      Total N      0.113, 0.134     12.02%
  ---------------- ------------ ------------ ---------------- ------------

Table 6. Summary of precision data for laboratory duplicates.

  ------------------------------- -------- -------------- ----------- -----
  Variable                        Median   Range          QA          n
                                                          Objective   

  pH, closed cell (values 5.74)   0        -0.85 to 0.07  0.075       44

  pH, closed cell (values 5.74)   0.01     -0.18 to 0.08  0.15        89

  pH, equilibrated (values 5.74)  0        -0.4 to 0.04   0.075       57

  pH, equilibrated (values 5.74)  0        -0.53 to 0.12  0.15        81

  ANC (values 100 µeq/L)          -0.09    -10.77 to 9.01 5 µeq/L     93

  ANC (values 100 µeq/L)          0.39%    0 to 3.45%     5%          58

  Conductivity (values 50uS/cm)   -0.04    -0.71 to 0.41  1 uS/cm     74

  Conductivity (values 50uS/cm)   0.20%    0 to 0.72%     2%          8

  DOC (values 2 mg/L)             -0.02    -0.3 to 0.17   0.1 mg/L    15

  DOC (values 2 mg/L)             0.74%    0 to 13.9%     5%          85

  DIC (values 2 mg/L)             0        -0.10 to 0.11  0.1 mg/L    50

  DIC (values 2 mg/L)             1.66%    0 to 3.9%      5%          10

  Al, total dissolved (values 100 -0.03    -4.9 to 4.4    10 µg/L     52
  µg/L)                                                               

  Al, total dissolved (values 100 0.57%    0 to 5.62%     10%         29
  µg/L)                                                               

  Ca (values 0.4 mg/L)            0        -0.02 to 0.005 0.02 mg/L   13

  Ca (values 0.4 mg/L)            0.76%    0 to 8.55%     5%          69

  Mg (values 0.2 mg/L)            0        -0.002 to      0.01 mg/L   16
                                           0.001                      

  Mg (values 0.2 mg/L)            0.73%    0 to 7.16%     5%          65

  Na (values 0.46 mg/L)           0        -0.002 to 0.02 0.02        12

  Na (values 0.46 mg/L)           1.03%    0 to 7%        5%          69

  K (values 0.8 mg/L)             0        -0.02 to 0.03  0.04 mg/L   77

  K (values 0.8 mg/L)             1.52%    0 to 7.44%     5%          33

  NH~4~ (values 0.36 mg/L)        0        -0.01 to 0.01  0.02 mg/L   83

  NH~4~ (values \> 0.36 mg/L)     0%       0 to 0%        5%          1

  Cl (values 20 µeq/L)            0.04     -0.98 to 1.35  1.0 µeq/L   39

  Cl (values 20 µeq/L)            0.14%    0 to 2.87%     5%          105

  NO~3~ (values 10 µeq/L)         0        -0.68 to 2.52  0.5 µeq/L   120

  NO~3~ (values 10 µeq/L)         0.23%    0.05 to 0.83%  5%          24

  SO~4~ (values 20 µeq/L)         0        -0.23 to 0.20  1.0 µeq/L   14

  SO~4~ (values 20 µeq/L)         0.12%    0 to 1.93%     5%          130

  Total P (values 20 µg/l)        0.10     -4.60 to 5.80  1 µg/L      72

  Total P (values \> 20 µg/l)     5.41%    0 to 63.23%    5%          30

  Total N (mg/l)                  0.85%    0 to 8.47%     5%          73

  Si (values 1 mg/L)              0        -0.04 to 0.05  0.05 mg/L   42

  Si (values 1 mg/L)              1.10%    0 to 5.83%     5%          42

  True Color (values 50 PCU)      0        -1.00 to 1.00  5 PCU       98

  True Color (values 50 PCU)      0%       0 to 0%        10%         13
  ------------------------------- -------- -------------- ----------- -----