TABLE III.

Summary of Chemical Matrix and Person Exposure Data

	Exposure Group - Chemical Use Potential
		Intermittent-Incidental Use		Routine Use
Item	Negligible Use Exp_Grp 0A	General Exp Grp 1A	Mfg Engineering Exp Grp 1B	Chemical Process Exp Grp 2A	Metal Machining Exp Grp 2B	TotalsB
Overall
Number of matrix department-yearsC	16824	8602	717	1171	493	27807
% of department-yearsD	60.50%	30.90%	2.60%	4.20%	1.80%	100.00%
Number of personsE	18266	17810	1856	11195	1773	34494
Person-years employed at facility	113369	97496	7566	38100	9624	266309
% of person-yrs employed at facility	42.60%	36.60%	2.80%	14.30%	3.60%	99.90%
Chemicals, GeneralF
Number of persons	0	17810	1856	11195	1773	24290
Person-years	0	97496	7566	38100	9624	152786
% of person-yrs. employed at facility	0.00%	36.61%	2.84%	14.31%	3.61%	57.37%
Acid-Base
Number of matrix department-years	7	513	103	820	26	1469
% of department-years	0.00%	1.80%	0.40%	2.90%	0.10%	5.30%
Number of persons	214	3135	496	9125	260	11387
Number of person-years	168	7737	1115	28072	465	37556
% of person-yrs. employed at facility	0.06%	2.91%	0.42%	10.54%	0.17%	14.10%
Aromatic Hydrocarbons
Number of matrix department-years	3	168	41	288	2	502
% of department-years	0.00%	0.60%	0.10%	1.00%	0.00%	1.80%
Number of persons	47	1128	208	4316	34	5481
Number of person-years	15	2435	483	9010	27	11970
% of person-yrs. employed at facility	0.01%	0.91%	0.18%	3.38%	0.01%	4.49%
Chlorinated Hydrocarbons
Number of matrix department-years	25	564	89	706	217	1601
% of department-years	0.10%	2.00%	0.30%	2.50%	0.80%	5.80%
Number of persons	401	3720	473	7045	1133	10426
Number of person-years	923	9558	1070	21811	3928	37291
% of person-yrs. employed at facility	0.35%	3.59%	0.40%	8.19%	1.48%	14.00%
Hydrocarbons, Other
Number of matrix department-years	18	1316	126	968	384	2812
% of department-years	0.10%	4.70%	0.50%	3.50%	1.40%	10.10%
Number of persons	346	7171	667	10426	1531	15788
Number of person-years	467	21003	1511	34191	7971	65144
% of person-yrs. employed at facility	0.18%	7.89%	0.57%	12.84%	2.99%	24.46%
Chlorofluorocarbons
Number of matrix department-years	15	328	29	510	90	972
% of department-years	0.10%	1.20%	0.10%	1.80%	0.30%	3.50%
Number of persons	216	2566	155	6977	424	8977
Number of person-years	475	6143	328	18023	964	25933
% of person-yrs. employed at facility	0.18%	2.31%	0.12%	6.77%	0.36%	9.74%
Metals
Number of matrix department-years	9	976	139	726	47	1897
% of department-years	0.00%	3.50%	0.50%	2.60%	0.20%	6.80%
Number of persons	117	4675	566	8217	319	11720
Number of person-years	207	14353	1495	22247	775	39077
% of person-yrs. employed at facility	0.08%	5.39%	0.56%	8.35%	0.29%	14.67%
Fiberglass
Number of matrix department-years	0	126	0	150	2	278
% of department-years	0.00%	0.50%	0.00%	0.50%	0.00%	1.00%
Number of persons	0	2245	0	3836	50	5334
Number of person-years	0	4150	0	7191	28	11369
% of person-yrs. employed at facility	0.00%	1.56%	0.00%	2.70%	0.01%	4.27%
Lead
Number of matrix department-years	8	927	86	439	7	1467
% of department-years	0.00%	3.30%	0.30%	1.60%	0.00%	5.30%
Number of persons	114	4456	353	6550	131	9986
Number of person-years	206	13796	931	14471	128	29532
% of person-yrs. employed at facility	0.08%	5.18%	0.35%	5.43%	0.05%	11.09%
Methylene Chloride
Number of matrix department-years	1	105	25	363	11	505
% of department-years	0.00%	0.40%	0.10%	1.30%	0.00%	1.80%
Number of persons	18	897	143	4250	80	5028
Number of person-years	14	1504	301	11335	150	13304
% of person-yrs. employed at facility	0.01%	0.56%	0.11%	4.26%	0.06%	5.00%
Methyl Chloroform
Number of matrix department-years	20	383	42	471	151	1067
% of department-years	0.10%	1.40%	0.20%	1.70%	0.50%	3.80%
Number of persons	301	2602	275	5561	881	8239
Number of person-years	875	6764	504	14747	2844	25733
% of person-yrs. employed at facility	0.33%	2.54%	0.19%	5.54%	1.07%	9.66%
Perchloroethylene
Number of matrix department-years	3	80	44	265	0	392
% of department-years	0.00%	0.30%	0.20%	1.00%	0.00%	1.40%
Number of persons	59	538	247	3401	0	4075
Number of person-years	19	1042	543	7829	0	9433
% of person-yrs. employed at facility	0.01%	0.39%	0.20%	2.94%	0.00%	3.54%
Trichloroethylene
Number of matrix department-years	1	66	15	154	35	271
% of department-years	0.00%	0.20%	0.10%	0.60%	0.10%	1.00%
Number of persons	23	540	109	2390	252	3135
Number of person-years	15	846	184	5238	633	6916
% of person-yrs. employed at facility	0.01%	0.32%	0.07%	1.97%	0.24%	2.60%

^AA small number of department-years (and associated persons) in Exp_Grp 0 were identified with chemical classes and agents in the exposure matrix. Examination of the source data revealed chemical use was not representative of the entire department-year in any of these cases.

^BTotals are the row sum for all items except:

¹Total number of persons is the number of unique workers ever included. Some individuals worked in more than one exposure group. NOTE: See Table IV for the total number of persons ever exposed as determined after cumulative exposure scores were calculated.

²Overall person-years employed at the facility total (n = 266309) includes person-years with no department identified.

^CTotal number of departments: 2986.

^DAmong the 39.5% of department-years with chemical use potential, 12.7% were associated with chemical agents and/or classes, and 26.8% were associated with unspecified chemical use.

^ETotal number of workers: 34494.

^FBy metric definition, Exp_Grp 0 contained no department-years (and thus no persons) exposed to Chemicals, General.