Mixed Analyte Performance Evaluation Program
Statistical Summary
	
Sample Id: MAPEP-97-S4
			       Grand      Std.	Reference   Acceptance
Analyte	          T(1)	A(2)    Mean	  Dev.	  Value	       Range	        Units
Arsenic	            36	32      37.02	   4.46	   38.70    27.09 - 50.31	(mg/kg)
Barium	            32	32     298.73	  45.88	  311.00   217.70 - 404.30	(mg/kg)
Beryllium	    33	32      28.84	   2.63	   29.20    20.44 - 37.96	(mg/kg)
Cadmium	            39	35       5.76	   0.67	    6.10     4.27 - 7.93	(mg/kg)
Chromium	    40	34      43.84	   6.68	   48.30    33.81 - 62.79	(mg/kg)
Lead	            41	39      37.57	   4.07	   38.20    26.74 - 49.66	(mg/kg)
Nickel	            40	39      51.55	   5.86	   53.70    37.59 - 69.81	(mg/kg)
Selenium	    32	23       5.60	   0.70	    5.40     3.78 - 7.02	(mg/kg)
Silver	            35	31      28.87	   1.84	   29.00    20.30 - 37.70	(mg/kg)
Thallium	    33	27      28.02	   3.46	   29.40    20.58 - 38.22	(mg/kg)
Vanadium	    36	31      61.65	   7.58	   63.20    44.24 - 82.16	(mg/kg)
Zinc	            41	39     101.49	   9.76	  106.00    74.20 - 137.80	(mg/kg)
Americium-241	    45	36      18.47	   2.23	   19.20    13.44 - 24.96	(Bq/kg)
Cesium-137	    60	56     797.44	  65.35	  777.00   543.90 - 1010.10	(Bq/kg)
Cobalt-57	    56	51     488.69	  48.09	  495.80   347.06 - 644.54	(Bq/kg)
Cobalt-60	    59	57     865.20	  69.12	  865.80   606.06 - 1125.54	(Bq/kg)
Manganese-54	    57	53     214.67	  20.07	  207.20   145.04 - 269.36	(Bq/kg)
Plutonium-238	    41	40      26.45	   2.66	   26.86    18.80 - 34.92	(Bq/kg)
Plutonium-239/240   41	39      38.68	   3.59	   39.88    27.92 - 51.84	(Bq/kg)
Potassium-40	    54	52     640.00	  63.49	  652.10   456.47 - 847.73	(Bq/kg)
Strontium-90	    33	27     465.45	  75.98	  500.24   350.17 - 650.31	(Bq/kg)
Uranium-234/233	    38	33      36.62	   3.66	   40.70    28.49 - 52.91	(Bq/kg)
Uranium-238	    45	40      37.75	   5.57	   40.70    28.49 - 52.91	(Bq/kg)
Zinc-65	            56	51    1791.29	 173.91	 1702.00  1191.40 - 2212.60	(Bq/kg)
Phenol	            27	27    8310.00	1820.00	 8310.00  2850.00 - 1377.00	(ug/kg)
2-Chlorophenol	    27	27    2090.00	 680.00	 2090.00    50.00 - 4130.00	(ug/kg)
Naphthalene	    27	27    2680.00	 530.00	 2680.00  1090.00 - 4270.00	(ug/kg)
4-Chloro-3-methyl
       phenol	    26	26    3580.00	 910.00	 3580.00   850.00 - 6310.00	(ug/kg)
Dimethylphthalate   27	27    8820.00	1450.00	 8820.00  4470.00 - 13170.00	(ug/kg)
2,6-Dinitrotoluene  22	20     420.00	  80.00	  420.00   180.00 - 660.00	(ug/kg)
Acenaphthene	    26	26    2680.00	 820.00	 2680.00   220.00 - 5140.00	(ug/kg)
2,4-Dinitrophenol   27	26   10210.00	2940.00	10210.00  1390.00 - 19030.00	(ug/kg)
4-Nitrophenol	    26	25   24600.00	5470.00	24610.00  8190.00 - 41010.00	(ug/kg)
Fluorene	    27	27    3830.00	 950.00	 3830.00   980.00 - 6680.00	(ug/kg)
2,4,5-Trichlor
       phenol	    24	24    4560.00	 790.00	 4560.00  2190.00 - 6930.00	(ug/kg)
Pentachlorophenol   28	27   14130.00	2620.00	14130.00  6270.00 - 21990.00	(ug/kg)
Di-n-butylphthalate 26	22    1370.00	 290.00	 1370.00   500.00 - 2240.00	(ug/kg)
Fluoranthene	    28	27    3980.00	 820.00	 3990.00  1520.00 - 6440.00	(ug/kg)
Pyrene	            28	27    3280.00	 740.00	 3280.00  1060.00 - 5500.00	(ug/kg)
Butylbenzylphthalate28	28    6810.00	1890.00	 6810.00  1140.00 - 12480.00	(ug/kg)
Benzo(a)anthracene  28	27    2760.00	 440.00	 2770.00  1440.00 - 4080.00	(ug/kg)
Chrysene	    28	27    2900.00	 610.00	 2900.00  1070.00 - 4730.00	(ug/kg)
Bis(2-ethylhexyl
     phthalate	    28	27    4930.00	1320.00	 4930.00   970.00 - 8890.00	(ug/kg)
Di-n-octylphthalate 26	25    2350.00	 530.00	 2350.00   760.00 - 3940.00	(ug/kg)

 (mg/kg) = milligrams per kilogram    (Bq/kg) = Becquerel per kilogram   
                       (ug/kg) = micrograms/kilogram
Outliers are excluded from the statistical summary.
Outliers are defined as laboratory means with a bias greater than 30 percent.
(1)	T = Total Number of Laboratories Reporting Analyte
(2)	A = Number of Laboratories with 'Acceptable' Performance 
   (For organic components in this study, absolute value of Z-Score < 3.0) 
Excludes laboratory inorganic data categorized as Total.

10/03/97                                                  Page 1