Mixed Analyte Performance Evaluation Program

Statistical Summary

 Sample Id:  MAPEP-96-W4
                                 Grand     Std.   Reference    Acceptance
Analyte           T(1)    A(2)    Mean     Dev.     Value         Range         Units
Antimony           39     36      1.00     0.07     1.00       0.70 - 1.30      (mg/L)
Arsenic            42     38      0.06     1.02     1.00       0.70 - 1.30      (mg/L)
Barium             41     40     10.06 	   0.51    10.20       7.14 - 13.26     (mg/L)
Beryllium          40     38      0.99     0.06     1.00       0.70 - 1.30      (mg/L)
Cadmium            43     40      0.25     0.02     0.26       0.18 - 0.34      (mg/L)
Chromium           42     40      1.00     0.07     1.00       0.70 - 1.30      (mg/L)
Lead               42     41      0.71     0.06     0.72       0.50 - 0.94      (mg/L)
Nickel             43     41      2.98     2.98     3.10       2.17 - 4.03      (mg/L)
Selenium           41     37      0.25     0.02     0.26       0.18 - 0.34      (mg/L)
Silver             41     39      0.50     0.04     0.51       0.36 - 0.66      (mg/L)
Thallium           39     36      1.01     0.07     1.00       0.70 - 1.30      (mg/L)
Vanadium           41     38      2.03     0.08     2.00       1.40 - 2.60      (mg/L)
Zinc               42     40      2.98     0.18     3.10       2.17 - 4.03      (mg/L)
Americium-241      39     34      0.86     0.08     0.90       0.63 - 1.17      (Bq/L)
Cesium-137         51     50    202.99    10.08   201.00     140.70 - 261.30    (Bq/L)
Cobalt-57          49     47    214.92    20.07   222.00     155.40 - 288.60    (Bq/L)
Cobalt-60          51     50    265.19    15.82   267.00     186.90 - 347.10    (Bq/L)
Plutonium-238      44     43      1.20     0.12     1.22       0.85 - 1.58      (Bq/L)
Plutonium-239      45     44      1.44     0.12     1.50       1.05 - 1.94      (Bq/L)
Strontium-90       37     36     25.63     2.31    26.38      18.47 - 34.29     (Bq/L)
Uranium-234/233    44     39      0.40     0.04     0.40       0.28 - 0.52      (Bq/L)
Uranium-238        46     40      0.41     0.03     0.42       0.29 - 0.54      (Bq/L)
Zinc-65            49     48     417.03   35.04   403.00     282.10 - 523.90    (Bq/L)
Phenol             33     12     495.20   97.62   509.60     364.64 - 643.76    (ug/L)
2-Chlorophenol     33     28     792.50  126.40   797.40     554.75 - 1030.30   (ug/L)
1,3-Dichlorobenzene32     25     401.64   55.90   400.50     281.10 - 522.10    (ug/L)
2,4-Dimethylphenol 33     26     582.46   84.47   582.10     407.72 - 757.20    (ug/L)
Naphthalene        33     29     305.52   52.26   305.20     213.86 - 397.17    (ug/L)
2-Methylphenol     15     13      18.04    2.13    17.60      12.63 - 23.45     (ug/L)
3 & 4 Methylphenol 27     22     745.53  119.00   768.50     521.87 - 969.19    (ug/L)
Diethylphthalatate 34     24     462.79   54.06   458.80     323.95 - 601.63    (ug/L)
2,4,5-Trichlorophenol
                   30     25     418.00   54.89   411.10     292.60 - 543.40    (ug/L)
Hexachlorobenzene  33     16     254.88   45.64   254.50     178.41 - 331.34    (ug/L)
Phenanthrene       34     25     285.80   41.39   281.90     200.06 - 371.54    (ug/L)
Anthracene         33     20     305.20   56.85   295.10     213.64 - 396.76    (ug/L)
Di-n-butylphthate  34     24     512.88   78.06   496.60     359.01 - 666.74    (ug/L)
Pyrene             33     20     534.90   96.60   514.80     374.43 - 695.37    (ug/L)
Butylbenzylphthate 34     17     508.53   72.42   489.60     355.97 - 661.09    (ug/L)
Benzo(a)anthracene 33     18     582.00  106.41   566.40     407.40 - 756.60    (ug/L)
Di-n-octylphthate  33     21     476.76   70.44   477.00     333.73 - 619.79    (ug/L)
Benzo(a)pyrene     32     18     471.61   83.31   463.80     330.13 - 613.09    (ug/L)

Sample size excludes outliers.
Outliers are defined as laboratory means with a bias greater than 30 percent.
T(1) = Total Number of Laboratories Reporting Analyte
A(2) = Number of Laboratories with 'Acceptable' Performance.
      (For organic components in this study, %Bias < 30%)

04/07/9