Lead: Human Exposure and Health Risk Assessments for Selected Case Studies 

Volume II. Appendices 

 [EPA-452/R-07-014b] 

October 2007 

Errata – October 10, 2008 

1. p. A-72 – A footnote was inadvertently omitted from Attachment A-2 (Table 4). The 

footnote should have been associated with entries for mean and 95th percentile ratio of 

max quarterly mean to annual mean and for mean ratio of max monthly mean to annual 

mean for urban sites in CBSAs > 1M population. This footnote should have stated 

“These values rounded to 2.5, 7.6 and 4.0, respectively, in a preliminary analysis of 92 

sites in this subset. Subsequent QA lead to a change in dataset and the statistical metric 

values.” Corrected Table shown on following page. 

2. p. B-19, EC/R Incorporated. (2006) – The citation is incorrect. The correct citation is as 

follows: EC/R Incorporated. (2006) Secondary Lead Smelter Industry– Source 

Characterization for Residual Risk Assessment. Prepared for U. S. Environmental 

Protection Agency, Office of Air and Radiation, Office of Air Quality Planning and 

Standards; November. 

3. p. G-47, Freed et al (1983) – The citation is incorrect. The correct citation is as follows: 

Freed, J. R.; Chambers, T.; Christie, W. N.; Carpenter, C. E. (1983) Methods for 

Assessing Exposure to Chemical Substance (Volume 2). EPA 560/5-83-015: pp.70-73. 

USEPA, Office of Toxic Substances. 

4. p. E-22, Alabama National Resources Conservation Service (2006) – The citation is 

incorrect. The correct citation is as follows: National Resources Conservation Service 

(NRCS). (2006) Soil Survey Geographic (SSURGO) Database for Pike County. Fort 

Worth, TX: U.S. Department of Agriculture (USDA). Available online at: 

http://soildatamart.nrcs.usda.gov/Survey.aspx?County=AL109. 
Table 4. Pb-TSP metric ratio distribution statistics 

Attachment A-2 

TSP Category Ratio Sites min pct5 pct10 pct15 pct20 pct25 pct30 pct35 pct40 pct45 median mean pct55 pct60 pct65 pct70 pct75 

ratio of max quarterly mean to annual mean 1.0000 1.1135 1.2080 1.2852 1.3433 1.3848 1.4837 1.5299 1.6127 1.7079 1.7846 2.3541 1.8893 2.0025 2.1421 2.3164 2.547

All sites ratio of max monthly mean to annual mean 189 1.0000 1.3553 1.5556 1.8176 1.9537 2.1475 2.2817 2.4036 2.5471 2.6265 2.8310 4.4159 2.9634 3.5018 4.0128 4.4273 4.987

ratio of 2nd max monthly mean to annual mean 0.0000 1.1211 1.3057 1.4296 1.5822 1.6784 1.7597 1.8311 1.9092 2.0346 2.1246 2.5728 2.2033 2.3015 2.4453 2.5908 2.765

ratio of max quarterly mean to annual mean 1.0000 1.0787 1.2484 1.3167 1.3529 1.3966 1.5077 1.5205 1.5559 1.7079 1.7571 2.0471 1.8085 1.9070 1.9759 2.1285 2.348

Source-oriented sites ratio of max monthly mean to annual mean 60 1.0000 1.4735 1.8318 1.9768 2.1641 2.2716 2.3528 2.5202 2.5824 2.7379 2.9086 3.7485 3.0625 3.5073 3.6900 4.0401 4.509

ratio of 2nd max monthly mean to annual mean 1.0000 1.4088 1.6543 1.6815 1.7864 1.8292 1.8838 1.9438 2.0124 2.1000 2.1723 2.4356 2.2784 2.4017 2.5034 2.5293 2.639

ratio of max quarterly mean to annual mean 1.0000 1.1368 1.2034 1.2648 1.3095 1.3826 1.4753 1.5591 1.6332 1.7079 1.8151 2.4980 1.9665 2.0293 2.2498 2.4153 2.689

Non-source-oriented sites ratio of max monthly mean to annual mean 129 1.0000 1.3140 1.4769 1.6578 1.8680 2.0164 2.2496 2.3671 2.5200 2.5851 2.7967 4.7287 2.9508 3.4823 4.0858 4.5723 5.592

ratio of 2nd max monthly mean to annual mean 0.0000 1.0746 1.2445 1.3294 1.4296 1.5582 1.6657 1.7556 1.8372 1.9200 2.1185 2.6371 2.1818 2.2633 2.3912 2.6316 2.824

ratio of max quarterly mean to annual mean 1.0000 1.0000 1.0000 1.0000 1.0000 1.2844 1.2844 1.4961 1.4961 1.5195 1.5195 2.2049 1.5195 1.7266 1.7266 1.9492 1.949

Previous source-oriented sites ratio of max monthly mean to annual mean 13 1.0000 1.0000 1.0000 1.0000 1.0000 1.7515 1.7515 1.8746 1.8746 2.7626 2.7626 3.4751 2.7626 2.7863 2.7863 3.7062 3.706

ratio of 2nd max monthly mean to annual mean 1.0000 1.0000 1.0000 1.0000 1.0000 1.7759 1.7759 2.1414 2.1414 2.5969 2.5969 4.9066 2.5969 3.0986 3.0986 8.4131 8.413

ratio of max quarterly mean to annual mean 1.0000 1.1605 1.2504 1.3070 1.3536 1.4227 1.5010 1.5712 1.6427 1.7167 1.7773 2.3313 1.8683 2.0072 2.1508 2.3167 2.589

Urban sites ratio of max monthly mean to annual mean 140 1.0000 1.3391 1.5925 1.7771 1.9220 2.1133 2.2936 2.4105 2.5423 2.6341 2.8310 4.2395 2.9518 3.4976 4.0307 4.4998 5.112

ratio of 2nd max monthly mean to annual mean 0.0000 1.1889 1.3271 1.4700 1.6053 1.6784 1.7660 1.8606 1.9967 2.1038 2.1650 2.6532 2.2452 2.3637 2.5051 2.6213 2.785

ratio of max quarterly mean to annual mean 1.0000 1.1077 1.2080 1.2745 1.3095 1.3759 1.4753 1.5167 1.6157 1.6829 1.7366 2.3159* 1.7900 1.8451 2.0496 2.3164 2.431

Urban sites in CBSAs > 1M population ratio of max monthly mean to annual mean 91 1.0000 1.3046 1.4769 1.6578 1.8346 1.9910 2.2676 2.3690 2.5370 2.5619 2.6726 4.0747* 2.8714 2.9508 3.5868 4.0253 4.64

ratio of 2nd max monthly mean to annual mean 0.0000 1.0746 1.3057 1.4089 1.4965 1.5855 1.6553 1.7491 1.7890 1.8960 2.0982 2.4155 2.1414 2.2633 2.3912 2.5004 2.596

ratio of max quarterly mean to annual mean 1.0000 1.2648 1.3522 1.3838 1.4152 1.5299 1.5608 1.6127 1.6901 1.9505 2.0025 2.3597 2.0091 2.1715 2.2498 2.6223 2.724

Urban sites in CBSAs < 1M population ratio of max monthly mean to annual mean 49 1.0000 1.4392 1.7365 1.9615 2.0898 2.2033 2.3056 2.5035 2.6417 2.9528 3.1207 4.5456 3.5286 4.4055 4.5723 5.0000 5.549

ratio of 2nd max monthly mean to annual mean 1.0000 1.3116 1.6698 1.7451 1.8787 1.9843 2.0346 2.1235 2.1673 2.2033 2.3435 3.0946 2.3684 2.6953 2.7642 2.9302 3.819