APPENDIX B 

DETAILED DESCRIPTIVE ANALYSES OF EXTERIOR DUST 

LEAD LOADINGS (INCLUDING BULK DEBRIS SAMPLES) 
B-1 

B1. Normality Check for Exterior Lead Dust Loadings (including Bulk Debris 

Samples) 

Distribution of Non-Detectable Exterior Lead Measurements 

None of the exterior measurements fell below detection limits. 

Normality of the Exterior Lead Measurement Distribution 

Prior to any analysis of the lead dust Loadings, the underlying distribution of the response data 

was examined for normality. Note that a Wilkes-Shapiro p-value < 0.001 indicates a departure 

from normality. With larger sample sizes, normality tests can indicate statistically significant but 

unimportant departures from normality. For the data collected for this study, the logtransformation of the data was accepted even when the Wilkes-Shapiro statistics indicated nonnormality. With additional time, potential outliers and other influential points could be explored 

to determine if other data adjustments would be beneficial to the analyses. 
B-2 

0 25000000 50000000 75000000 100000000 125000000

0

20

40

60

80

100

Percent

Lead Dust Loading (micrograms/sq ft)

Figure B1.1a. Histogram of Dust Lead Measurements with Bulk (μg/ft2) from Top of Rule 

Plastic (Wilkes-Shapiro p-value < 0.001) 

6.25 8.75 11.25 13.75 16.25 18.75

0

5

10

15

20

25

30

35

40

Percent

Log-Transformed Lead Dust Loading (micrograms/sq ft)

Figure B1.1b. Histogram of Log Transformed Dust Lead Measurements with Bulk (μg/ft2) 

from Top of Rule Plastic (Wilkes-Shapiro p-value = 0.904) 
B-3 

0 80000 160000 240000 320000 400000

0

20

40

60

80

100

Percent

Lead Dust Loading (micrograms/sq ft)

Figure B1.2a. Histogram of Dust Lead Measurements with Bulk (μg/ft2) from Under Rule 

Plastic (Wilkes-Shapiro p-value < 0.001) 

3 5 7 9 11 13

0

5

10

15

20

25

30

35

Percent

Log-Transformed Lead Dust Loading (micrograms/sq ft)

Figure B1.2b. Histogram of Log Transformed Dust Lead Measurements with Bulk (μg/ft2) 

from Under Rule Plastic (Wilkes-Shapiro p-value = 0.003) 
B-4 

0 500000 1000000 1500000 2000000 2500000

0

20

40

60

80

100

Percent

Lead Dust Loading (micrograms/sq ft)

Figure B1.3a. Histogram of Dust Lead Measurements with Bulk (μg/ft2) from Near Rule 

Plastic (Wilkes-Shapiro p-value < 0.001) 

5.25 6.75 8.25 9.75 11.25 12.75 14.25

0

5

10

15

20

25

30

35

Percent

Log-Transformed Lead Dust Loading (micrograms/sq ft)

Figure B1.3b. Histogram of Log Transformed Dust Lead Measurements with Bulk (μg/ft2) 

from Near Rule Plastic (Wilkes-Shapiro p-value = 0.055) 
B-5 

B2. Exploratory Summaries of Exterior Lead Dust Loadings (including Bulk 

Debris Samples) vs. Select Characteristics 

Box plots of the dust lead Loadings recorded from top of, under and near rule plastic as well as 

descriptive statistical summary tables are presented in this section to illustrate and summarize the 

distribution of these factors as a function of select characteristics. Box plots are a technique for 

displaying one-dimensional data and their summary characteristics. A box plot displays the 

median (represented by the center horizontal line), the 25th percentile (represented by the bottom 

of the box), and the 75th percentile (represented by the top of the box). The vertical lines, or 

whiskers, are drawn from the box to the most extreme point within 1.5 * interquartile range. (An 

interquartile range is the distance between the 25th and the 75th percentiles.) Any value more 

extreme than this is identified individually with stars. The data are plotted using a log-base 10 

scale. The summary statistics provided in the tables are sample size, geometric mean, geometric 

standard error, minimum, 10th percentile, 25th percentile, median, 75th percentile, 90th percentile, 

and maximum. 

The selected characteristics are as follows: 

1. Job intensity 

2. City 

3. Job type 

4. Contractor 

5. Housing unit 
B-6 

Top of Rule Plastic Dust Lead Loading ( g/sq ft)

1.00E+02

1.00E+03

1.00E+04

1.00E+05

1.00E+06

1.00E+07

1.00E+08

1.00E+09

Combined Low Medium High

Figure B2.1a. Box Plots of Dust Lead Loading with Bulk Measured Top of Rule Plastic by 

Job Intensity Level 

Table B2.1a. Descriptive Summary of Dust Lead Loading with Bulk Measured Top of 

Rule Plastic by Job Intensity Level 

Top of Rule 

Plastic - 

Intensity Level

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 15 3,303,873 544,525 956 196,760 494,822 1,819,556 29,401,680 

2-Medium 15 10,808,565 180,013 417 8,556 268,359 2,538,052 130,670,000 

3-Low 15 569,782 144,545 4,109 30,060 151,734 888,167 2,991,198 

Combined 45 4,894,073 241,977 417 43,976 268,359 1,652,382 130,670,000 
B-7 

Under Rule Plastic Dust Lead Loading ( g/sq ft)

10

100

1000

10000

100000

1000000

Combined Low Medium High

Figure B2.1b. Box Plots of Dust Lead Loading with Bulk Measured Under Rule Plastic by 

Job Intensity Level 

Table B2.1b. Descriptive Summary of Dust Lead Loading with Bulk Measured Under 

Rule Plastic by Job Intensity Level 

Under Rule 

Plastic - 

Intensity Level

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 15 61,639 3,689 87 469 1,204 44,098 438,699 

2-Medium 15 4,789 182 15 24 105 967 65,815 

3-Low 15 2,230 164 15 23 129 411 24,744 

Combined 45 22,886 479 15 68 322 1,523 438,699 
B-8 

Near Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

10000000

Combined Low Medium High

Figure B2.1c. Box Plots of Dust Lead Loading with Bulk Measured Near Rule Plastic by 

Job Intensity Level 

Table B2.1c. Descriptive Summary of Dust Lead Loading with Bulk Measured Near Rule 

Plastic by Job Intensity Level 

Near Rule 

Plastic - 

Intensity Level

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 15 18,311 2,937 150 331 1,836 18,002 85,985 

2-Medium 15 185,462 3,083 172 488 1,205 16,597 2,692,069 

3-Low 15 47,629 21,232 1,129 8,768 27,082 61,388 217,900 

Combined 45 83,800 5,771 150 929 9,865 27,650 2,692,069 
B-9 

Top of Rule Plastic Dust Lead Loading ( g/sq ft)

1.00E+02

1.00E+03

1.00E+04

1.00E+05

1.00E+06

1.00E+07

1.00E+08

1.00E+09

Combined OH PA

Figure B2.2a. Box Plots of Dust Lead Loading with Bulk Measured Top of Rule Plastic by 

City 

Table B2.2a. Descriptive Summary of Dust Lead Loading with Bulk Measured Top of 

Rule Plastic by City 

Top of Rule 

Plastic - City

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Columbus, OH 30 6,016,101 235,057 417 22,004 304,926 1,652,382 130,670,000

Pittsburgh, PA 15 2,650,016 256,436 956 43,976 217,311 1,794,377 29,401,680

Combined 45 4,894,073 241,977 417 43,976 268,359 1,652,382 130,670,000
B-10 

Under Rule Plastic Dust Lead Loading ( g/sq ft)

10

100

1000

10000

100000

1000000

Combined OH PA

Figure B2.2b. Box Plots of Dust Lead Loading with Bulk Measured Under Rule Plastic by 

City 

Table B2.2b. Descriptive Summary of Dust Lead Loading with Bulk Measured Under 

Rule Plastic by City 

Under Rule 

Plastic - City

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Columbus, OH 30 11,821 450 15 87 295 1,523 216,592

Pittsburgh, PA 15 45,017 544 15 23 360 11,220 438,699

Combined 45 22,886 479 15 68 322 1,523 438,699
B-11 

Near Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

10000000

Combined OH PA

Figure B2.2c. Box Plots of Dust Lead Loading with Bulk Measured Near Rule Plastic by 

City 

Table B2.2c. Descriptive Summary of Dust Lead Loading with Bulk Measured Near Rule 

Plastic by City 

Near Rule 

Plastic - City

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Columbus, OH 30 107,571 6,284 172 929 11,017 27,082 2,692,069

Pittsburgh, PA 15 36,259 4,867 150 658 3,793 31,708 217,900

Combined 45 83,800 5,771 150 929 9,865 27,650 2,692,069
B-12 

 Combined |----------- Low ---------| |--- Medium --| |---------- High ----------| 

Top of Rule Plastic Dust Lead Loading ( g/sq ft)

1.00E+02

1.00E+03

1.00E+04

1.00E+05

1.00E+06

1.00E+07

1.00E+08

1.00E+09

12345678

Figure B2.3a. Box Plots of Dust Lead Loading with Bulk Measured Top of Rule Plastic by 

Job Type 

Table B2.3a. Descriptive Summary of Dust Lead Loading with Bulk Measured Top of 

Rule Plastic by Job Type 

Top of Rule 

Plastic - Job 

Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

E1-Door 

Replacem ent 6 89,447 60,662 14,441 30,060 61,570 151,734 217,311

E2-Trim Soffit 

Replacem ent 6 1,119,715 296,251 4,109 115,207 906,700 1,794,377 2,991,198

E3-Rotopene 3 430,586 195,372 22,004 22,004 381,586 888,167 888,167

E4-Heat gun 

under 1100 

degrees 3 44,781,729 7,216,358 1,133,090 1,133,090 2,538,052 130,670,000 130,670,000

E5-Dry Scrape 12 2,315,273 71,540 417 5,457 32,584 1,712,876 12,516,130

E6-Pow er 

Sanding 6 2,294,746 591,491 106,383 129,738 288,185 4,666,776 8,289,211

E7-Torching 6 5,711,161 562,462 956 349,644 1,347,566 1,819,556 29,401,680

E8-Heat gun 

over 1100 

degrees 3 507,548 432,520 196,760 196,760 494,822 831,062 831,062

Combined 45 4,894,073 241,977 417 43,976 268,359 1,652,382 130,670,000
B-13 

 Combined |----------- Low ---------| |--- Medium --| |---------- High ----------| 

Under Rule Plastic Dust Lead Loading ( g/sq ft)

10

100

1000

10000

100000

1000000

12345678

Figure B2.3b. Box Plots of Dust Lead Loading with Bulk Measured Under Rule Plastic by 

Job Type 

Table B2.3b. Descriptive Summary of Dust Lead Loading with Bulk Measured Under 

Rule Plastic by Job Type 

Under Rule 

Plastic - Job 

Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

E1-Door 

Replacem ent 6 77 32 15 19 21 26 360

E2-Trim Soffit 

Replacem ent 6 5,351 648 74 115 270 6,635 24,744

E3-Rotopene 3 294 270 162 162 268 451 451

E4-Heat gun 

under 1100 

degrees 3 22,659 3,149 248 248 1,914 65,815 65,815

E5-Dry Scrape 12 322 89 15 23 67 186 2,156

E6-Pow er 

Sanding 6 45,447 4,896 322 554 5,558 44,098 216,592

E7-Torching 6 108,308 8,565 469 719 6,212 197,538 438,699

E8-Heat gun 

over 1100 

degrees 3 684 388 87 87 442 1,523 1,523

Combined 45 22,886 479 15 68 322 1,523 438,699
B-14 

 Combined |----------- Low ---------| |--- Medium --| |---------- High ----------| 

Near Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

10000000

12345678

Figure B2.3c. Box Plots of Dust Lead Loading with Bulk Measured Near Rule Plastic by 

Job Type 

Table B2.3c. Descriptive Summary of Dust Lead Loading with Bulk Measured Near Rule 

Plastic by Job Type 

Near Rule 

Plastic - Job 

Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

E1-Door 

Replacem ent 6 28,156 13,527 1,129 3,793 24,008 31,708 84,290

E2-Trim Soffit 

Replacem ent 6 85,698 60,939 19,278 27,082 58,120 133,690 217,900

E3-Rotopene 3 10,435 6,350 1,380 1,380 8,768 21,158 21,158

E4-Heat gun 

under 1100 

degrees 3 912,201 107,916 16,884 16,884 27,650 2,692,069 2,692,069

E5-Dry Scrape 12 3,777 1,267 172 381 941 5,887 16,597

E6-Pow er 

Sanding 6 42,532 31,602 9,865 16,905 38,360 65,719 85,985

E7-Torching 6 681 425 150 151 428 1,093 1,836

E8-Heat gun 

over 1100 

degrees 3 5,128 1,208 331 331 363 14,689 14,689

Combined 45 83,800 5,771 150 929 9,865 27,650 2,692,069
B-15 

Top of Rule Plastic Dust Lead Loading ( g/sq ft)

1.00E+02

1.00E+03

1.00E+04

1.00E+05

1.00E+06

1.00E+07

1.00E+08

1.00E+09

Combined C1 C2 C3 C4

Figure B2.4a. Box Plots of Dust Lead Loading with Bulk Measured Top of Rule Plastic by 

Contractor 

Table B2.4a. Descriptive Summary of Dust Lead Loading with Bulk Measured Top of 

Rule Plastic by Contractor 

Top of Rule 

Plastic - 

Contractor

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C1 9 2,927,109 394,806 8,556 106,383 234,877 4,666,776 12,516,130

C2 12 11,577,607 486,864 4,109 155,983 662,942 1,392,736 130,670,000

C3 9 1,689,753 53,005 417 2,357 14,348 1,463,974 11,480,352

C4 15 2,650,016 256,436 956 43,976 217,311 1,794,377 29,401,680

Combined 45 4,894,073 241,977 417 43,976 268,359 1,652,382 130,670,000
B-16 

Under Rule Plastic Dust Lead Loading ( g/sq ft)

10

100

1000

10000

100000

1000000

Combined C1 C2 C3 C4

Figure B2.4b. Box Plots of Dust Lead Loading with Bulk Measured Under Rule Plastic by 

Contractor 

Table B2.4b. Descriptive Summary of Dust Lead Loading with Bulk Measured Under 

Rule Plastic by Contractor 

Under Rule 

Plastic - 

Contractor

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C1 9 30,419 1,402 15 322 782 10,334 216,592

C2 12 6,506 688 87 205 427 1,719 65,815

C3 9 309 82 18 24 66 170 2,156

C4 15 45,017 544 15 23 360 11,220 438,699

Combined 45 22,886 479 15 68 322 1,523 438,699
B-17 

Near Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

10000000

Combined C1 C2 C3 C4

Figure B2.4c. Box Plots of Dust Lead Loading with Bulk Measured Near Rule Plastic by 

Contractor 

Table B2.4c. Descriptive Summary of Dust Lead Loading with Bulk Measured Near Rule 

Plastic by Contractor 

Near Rule 

Plastic - 

Contractor

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C1 9 29,028 11,559 929 4,178 16,905 58,718 85,985

C2 12 243,884 13,895 331 5,074 19,021 41,251 2,692,069

C3 9 4,363 1,186 172 274 574 7,596 16,597

C4 15 36,259 4,867 150 658 3,793 31,708 217,900

Combined 45 83,800 5,771 150 929 9,865 27,650 2,692,069
B-18 

Top of Rule Plastic Dust Lead Loading ( g/sq ft)

1.00E+02

1.00E+03

1.00E+04

1.00E+05

1.00E+06

1.00E+07

1.00E+08

1.00E+09

Combined C1 1 2 9 10 13 16 17 19

Figure B2.5a. Box Plots of Dust Lead Loading with Bulk Measured Top of Rule Plastic by 

Housing Unit 

Table B2.5a. Descriptive Summary of Dust Lead Loading with Bulk Measured Top of 

Rule Plastic by Housing Unit 

Top of Rule 

Plastic - 

Housing Unit

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C01 9 15,239,954 848,000 22,004 381,586 831,062 1,133,090 130,670,000

H01 9 2,927,109 394,806 8,556 106,383 234,877 4,666,776 12,516,130

H02 3 590,566 92,139 4,109 4,109 115,207 1,652,382 1,652,382

H09 6 574,119 20,522 417 1,845 8,351 1,463,974 1,961,779

H10 6 1,072,004 262,588 956 161,018 742,236 1,794,377 2,991,198

H13 3 10,927,180 4,370,343 1,560,303 1,560,303 1,819,556 29,401,680 29,401,680

H16 3 103,638 62,864 14,441 14,441 79,163 217,311 217,311

H17 3 75,257 58,537 30,060 30,060 43,976 151,734 151,734

H19 3 3,921,020 353,580 14,348 14,348 268,359 11,480,352 11,480,352

Combined 45 4,894,073 241,977 417 43,976 268,359 1,652,382 130,670,000
B-19 

Under Rule Plastic Dust Lead Loading ( g/sq ft)

10

100

1000

10000

100000

1000000

Combined C1 1 2 9 10 13 16 17 19

Figure B2.5b. Box Plots of Dust Lead Loading with Bulk Measured Under Rule Plastic by 

Housing Unit 

Table B2.5b. Descriptive Summary of Dust Lead Loading with Bulk Measured Under 

Rule Plastic by Housing Unit 

Under Rule 

Plastic - 

Housing Unit

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C01 9 7,879 691 87 248 442 1,523 65,815

H01 9 30,419 1,402 15 322 782 10,334 216,592

H02 3 2,387 679 115 115 411 6,635 6,635

H09 6 417 94 18 24 67 170 2,156

H10 6 6,226 981 74 129 594 11,220 24,744

H13 3 212,480 47,078 1,204 1,204 197,538 438,699 438,699

H16 3 134 54 19 19 23 360 360

H17 3 20 19 15 15 19 26 26

H19 3 92 62 22 22 53 201 201

Combined 45 22,886 479 15 68 322 1,523 438,699
B-20 

Near Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

10000000

Combined C1 1 2 9 10 13 16 17 19

Figure B2.5c. Box Plots of Dust Lead Loading with Bulk Measured Near Rule Plastic by 

Housing Unit 

Table B2.5c. Descriptive Summary of Dust Lead Loading with Bulk Measured Near Rule 

Plastic by Housing Unit 

Near Rule 

Plastic - 

Housing Unit

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C01 9 309,255 9,391 331 1,380 14,689 21,158 2,692,069

H01 9 29,028 11,559 929 4,178 16,905 58,718 85,985

H02 3 47,774 45,011 27,082 27,082 54,851 61,388 61,388

H09 6 484 380 172 190 381 574 1,205

H10 6 61,895 3,689 150 151 9,738 133,690 217,900

H13 3 1,196 1,097 658 658 1,093 1,836 1,836

H16 3 39,042 14,450 1,129 1,129 31,708 84,290 84,290

H17 3 17,270 12,662 3,793 3,793 17,590 30,426 30,426

H19 3 12,121 11,533 7,596 7,596 12,169 16,597 16,597

Combined 45 83,800 5,771 150 929 9,865 27,650 2,692,069
B-21 

B3. Exploratory Summaries of Exterior Dust Lead Dust Loadings (including 

Bulk Debris Samples) vs. Select Continuous Characteristics 

Scatter plots of the exterior dust lead loadings recorded are presented in this section to illustrate 

and summarize the distribution of these factors as a function of select characteristics. The 

exterior dust levels throughout this section include the bulk debris samples collected. The fitted 

linear regression line (using untransformed data) is displayed in each plot along with its 

associated r-square value. 

The selected characteristics are as follows: 

1. Paint Lead Concentration 

2. Initial Average Soil Lead Concentration 

3. Final Average Soil Lead Concentration 

4. Disturbed Area 
B-22 

Top of Rule Plastic Lead Loading

1.00E+03

1.00E+04

1.00E+05

1.00E+06

1.00E+07

1.00E+08

1.00E+09

Average Paint Lead Concentration (ppm) (R-Square = 16.1%)

10 20 30 40

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

oo

o

o

o

o

o

o

Under Rule Plastic Lead Loading

10

100

1000

10000

100000

1000000

Average Paint Lead Concentration (ppm) (R-Square = 0.19%)

0 10 20 30 40

o

o

o

oo

o

o

o

o

o

o o

oo

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Near Rule Plastic Lead Loading

100

1000

10000

100000

1000000

10000000

Average Paint Lead Concentration (ppm) (R-Square = 17.34%)

10 20 30 40

o

o

o

o

o

o

o

oo

o

o

o o

o

o

o

o

o

o

o

o

o

o o

o

o

o

o

o

o

o

Figure B3.1. Scatter Plots of Average Paint Lead Concentration by Top of, Under, and 

Near Rule Plastic 
B-23 

Top of Rule Plastic Lead Loading

100

1000

10000

100000

1000000

10000000

100000000

Average Initial Soil Lead Loading (R-Square = 0.3%)

200 400 600 800 1000 1200 1400 1600 1800

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

oo o

o

o

o

o

o

o

o

o

o

o

o o

o

o

o

o

o

Under Rule Plastic Lead Loading

10

100

1000

10000

100000

1000000

Average Initial Soil Lead Loading (R-Square = 0.26%)

200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800

o

o

o o

o

o

o

oo

o

o

o

o

o

o

o

o

o

oo o

o

o

o

o

o

o

o

o

o

oo

o

o

o

Near Rule Plastic Lead Loading

100

1000

10000

100000

1000000

Average Initial Soil Lead Loading (R-Square = 0.06%)

200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800

o

o

o

o

o

o

o

o

o

o

o o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

Figure B3.2. Scatter Plots of Initial Average Soil Lead Loading by Top of, Under, and 

Near Rule Plastic 
B-24 

Top of Rule Plastic Lead Loading

100

1000

10000

100000

1000000

10000000

100000000

Average Final Soil Lead Loading (R-Square = 0.35%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

o

o o

oo

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o o

o

o o

o

o

o

o

o

Under Rule Plastic Lead Loading

10

100

1000

10000

100000

1000000

Average Final Soil Lead Loading (R-Square = 0.77%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

oo

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

Near Rule Plastic Lead Loading

100

1000

10000

100000

1000000

Average Final Soil Lead Loading (R-Square = 5.26%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

o

o o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

Figure B3.3. Scatter Plots of Final Average Soil Lead Loading by Top of, Under, and Near 

Rule Plastic 
B-25 

Top of Rule Plastic Lead Loading

1.00E+02

1.00E+03

1.00E+04

1.00E+05

1.00E+06

1.00E+07

1.00E+08

1.00E+09

Disturbed Area (Sq. Feet) (R-Square = 0.02%)

0 100 200 300

o

o

o

oo

o

o

o

o

o

o

o

o

o

o o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

Under Rule Plastic Lead Loading

10

100

1000

10000

100000

1000000

Disturbed Area (Sq. Feet) (R-Square = 0%)

0 100 200 300

o

ooo

o

o

o

o

o

o

o

o

o

o

o

o

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100

1000

10000

100000

1000000

10000000

Disturbed Area (Sq. Feet) (R-Square = 0.16%)

0 100 200 300

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Figure B3.4. Scatter Plots of Disturbed Area by Top of, Under, and Near Rule Plastic 
APPENDIX C 

DETAILED DESCRIPTIVE ANALYSES OF INTERIOR FLOOR 

DUST LEAD LOADINGS 
C-1 

C1. Distribution Check for Floor Dust Lead Loadings 

Distribution of Non-Detectable Floor Lead Measurements 

Measurements recorded at or below the detection limit were set to half that limit for this analysis. 

Table C1.1 summarizes the frequency for these measurements. 

Table C1.1. Summary of Floor Dust Lead Loading Measurements (μg/ft2) Below 

Detection Limit Measurements by Room and Stage 

Room 

Stage Work Tool Observation 

Post-Work 3 ( 1.2%) 20 (15.2%) 42 (35.0%) 

Post-Cleaning 41 (17.1%) 20 (15.2%) 37 (30.8%) 

Post-Verification 72 (30.0%) 16 (12.1%) 36 (30.0%) 

Normality of the Floor Lead Measurement Distribution 

Prior to any analysis of the lead dust Loadings, the underlying distribution of the response data 

was examined for normality. Note that a Wilkes-Shapiro p-value < 0.001 indicates a significant 

departure from normality. With larger sample sizes, normality tests can indicate statistically 

significant but unimportant departures from normality. For the data collected for this study, the 

log-transformation of the data was accepted even when the Wilkes-Shapiro statistics indicated 

non-normality. With additional time, potential outliers and other influential points could be 

explored to determine if other data adjustments would be beneficial to the analyses. 
C-2 

Figures C1.1a and C1.1b summarize the distribution of the raw and natural log-transformed floor 

dust lead measurements from the work room. Note that 118 (16%) of these measurements fell 

below the measurement detection level. 

7500 37500 67500 97500 127500 157500 187500

0

20

40

60

80

100

Percent

Lead Dust Loading (micrograms/sq ft)

Figure C1.1a. Histogram of Floor Dust Lead Loading Measurements (μg/ft2) in the Work 

Room Across All Stages (Wilkes-Shapiro p-value < 0.001) 

1.6 2.4 3.2 4 4.8 5.6 6.4 7.2 8 8.8 9.6 10.4 11.2 12

0

2.5

5.0

7.5

10.0

12.5

15.0

17.5

Percent

Log-Transformed Lead Dust Loading (micrograms/sq ft)

Figure C1.1b. Histogram of Log Transformed Floor Dust Lead Loading Measurements 

(μg/ft2

) in the Work Room Across All Stages (Wilkes-Shapiro p-value = < 

0.001)
C-3 

Figures C1.2a and C1.2b summarize the distribution of the raw and natural log-transformed floor 

dust lead measurements from the tool room. Note that 56 (14%) of these measurements fell 

below the measurement detection level. 

1250 3750 6250 8750 11250 13750 16250 18750 21250 23750 26250

0

20

40

60

80

100

Percent

Lead Dust Loading (micrograms/sq ft)

Figure C1.2a. Histogram of Floor Dust Lead Loading Measurements (μg/ft2) in the Tool 

Room Across All Stages (Wilkes-Shapiro p-value < 0.001) 

2 2.8 3.6 4.4 5.2 6 6.8 7.6 8.4 9.2 10

0

5

10

15

20

25

Percent

Log-Transformed Lead Dust Loading (micrograms/sq ft)

Figure C1.2b. Histogram of Log Transformed Floor Dust Lead Loading Measurements 

(μg/ft2

) in the Tool Room Across All Stages (Wilkes-Shapiro p-value = < 

0.001) 
C-4 

Figures C1.3a and C1.3b summarize the distribution of the raw and natural log-transformed floor 

dust lead measurements from the observation room. Note that 115 (32%) of these measurements 

fell below the measurement detection level. 

0 300 600 900 1200 1500 1800 2100 2400 2700

0

20

40

60

80

100

Percent

Lead Dust Loading (micrograms/sq ft)

Figure C1.3a. Histogram of Floor Dust Lead Loading Measurements (μg/ft2) in the 

Observation Room Across All Stages (Wilkes-Shapiro p-value < 0.001) 

1.8 2.4 3 3.6 4.2 4.8 5.4 6 6.6 7.2 7.8

0

5

10

15

20

25

30

35

Percent

Log-Transformed Lead Dust Loading (micrograms/sq ft)

Figure C1.3b. Histogram of Log Transformed Floor Dust Lead Loading Measurements 

(μg/ft2

) in the Observation Room Across All Stages (Wilkes-Shapiro p-value 

= < 0.001) 
C-5 

C2. Exploratory Summaries of Floor Dust Lead Dust Loadings vs. Select 

Categorical Characteristics 

Box plots of the dust lead Loadings recorded from floors as well as descriptive statistical 

summary tables are presented in this section to illustrate and summarize the distribution of these 

factors as a function of select characteristics. Box plots are a technique for displaying onedimensional data and their summary characteristics. A box plot displays the median (represented 

by the center horizontal line), the 25th percentile (represented by the bottom of the box), and the 

75th percentile (represented by the top of the box). The vertical lines, or whiskers, are drawn 

from the box to the most extreme point within 1.5 * interquartile range. (An interquartile range 

is the distance between the 25th and the 75th percentiles.) Any value more extreme than this is 

identified individually with stars. The data are plotted using a log-base 10 scale. The summary 

statistics provided in the tables are sample size, arithmetic average, geometric average, 

minimum, 25th percentile, median, 75th percentile, maximum, and the percentage of 

measurements exceeding the federal standards for floor lead of 40 μg/ft2

. 

The selected characteristics are as follows: 

6. Job intensity 

7. City 

8. Job type 

9. Contractor 

10. Housing unit 

11. Rule Plastic Use 

12. Cleaning Type 

13. Phase 

14. Restricted vs. non-restricted jobs 

15. Work room floor type 

16. Work room floor condition
C-6 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

LMH LMH LMH

Figure C2.1a. Box Plots of Floor Dust Lead Loading Measured in the Work Room by Stage 

and Job Intensity Level 

Table C2.1a. Descriptive Summary of Floor Dust Lead Loading Measured in the Work 

Room by Stage and Job Intensity Level 

Stage

W ork Room - Floor 

Dust (Intensity)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-High 81 18287 3304 5 1351 3802 23124 180281 95%

2-Medium 80 23458 6931 65 2314 9552 32507 209798 100%

3-Low 80 4674 1037 5 243 1262 3626 61134 96%

1-High 80 498 64 5 16 47 154 6420 55%

2-Medium 80 215 81 5 33 74 202 2347 70%

3-Low 80 55 25 5 5 22 84 412 38%

1-High 80 344 40 5 5 27 168 5206 45%

2-Medium 80 134 48 5 20 45 107 2583 55%

3-Low 80 33 16 5 5 17 40 212 25%

PostVerification

Post-Work

Post-Clean
C-7 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

LMH LMH LMH

Figure C2.1b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and Job 

Intensity Level 

Table C2.1b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room by Stage 

and Job Intensity Level 

Stage

Tool Room - Floor 

Dust (Intensity)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-High 44 505 53 5 10 36 224 8667 48%

2-Medium 44 560 89 5 26 69 216 9031 61%

3-Low 44 45 25 5 15 20 45 345 32%

1-High 44 455 54 5 8 34 210 3553 48%

2-Medium 44 632 94 5 31 76 213 13167 68%

3-Low 44 58 27 5 14 25 52 869 34%

1-High 44 311 50 5 11 31 261 3963 45%

2-Medium 44 471 92 5 40 65 225 6902 75%

3-Low 44 971 37 5 16 25 59 26266 30%

PostVerification

Post-Work

Post-Clean
C-8 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

LMH LMH LMH

Figure C2.1c. Box Plots of Floor Dust Lead Loading in the Observation Room by Stage and 

Job Intensity Level 

Table C2.1c. Descriptive Summary of Floor Dust Lead Loading in the Observation Room 

by Stage and Job Intensity Level 

Stage

Obs. Room - Floor 

Dust (Intensity)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-High 40 86 18 5 5 5 58 863 30%

2-Medium 40 286 58 5 17 41 105 2674 53%

3-Low 40 25 12 5 5 11 28 189 13%

1-High 40 129 23 5 5 11 81 1101 30%

2-Medium 40 247 56 5 22 32 94 2841 43%

3-Low 40 37 13 5 5 12 25 632 8%

1-High 40 134 21 5 5 11 48 1510 30%

2-Medium 40 220 62 5 23 45 140 2087 55%

3-Low 40 21 13 5 5 15 28 85 13%

Post-Work

Post-Clean

PostVerification
C-9 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

OH PA OH PA OH PA

Figure C2.2a. Box Plots of Floor Dust Lead Loading in the Work Room by Stage and City 

Table C2.2a. Descriptive Summary of Floor Dust Lead Loading in the Work Room by 

Stage and City 

Stage

W ork Room - Floor 

Dust (City)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Colum bus, OH 153 15805 2881 5 712 3265 16046 209798 97%

Pittsburgh, PA 88 14927 2866 5 729 3136 18399 144393 97%

Colum bus, OH 152 202 48 5 16 48 124 6420 56%

Pittsburgh, PA 88 349 55 5 15 46 149 3769 51%

Colum bus, OH 152 106 30 5 5 30 80 2583 43%

Pittsburgh, PA 88 282 34 5 5 25 102 5206 40%

PostVerification

Post-Work

Post-Clean
C-10 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

OH PA OH PA OH PA

Figure C2.2b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and City 

Table C2.2b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room by Stage 

and City 

Stage

Tool Room - Floor 

Dust (City)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Colum bus, OH 88 310 50 5 16 43 124 9031 52%

Pittsburgh, PA 44 490 47 5 14 29 70 8667 36%

Colum bus, OH 88 351 52 5 17 47 109 13167 55%

Pittsburgh, PA 44 442 51 5 12 30 92 3553 41%

Colum bus, OH 88 716 54 5 16 39 112 26266 49%

Pittsburgh, PA 44 322 57 5 13 54 255 3963 52%

PostVerification

Post-Work

Post-Clean
C-11 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

OH PA OH PA OH PA

Figure C2.2c. Box Plots of Floor Dust Lead Loading in the Observation Room by Stage and 

City 

Table C2.2c. Descriptive Summary of Floor Dust Lead Loading in the Observation Room 

by Stage and City 

Stage

Obs. Room - Floor 

Dust (City)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Colum bus, OH 76 164 29 5 5 28 55 2674 37%

Pittsburgh, PA 44 77 17 5 5 11 25 863 23%

Colum bus, OH 76 148 26 5 5 24 55 2841 29%

Pittsburgh, PA 44 121 25 5 5 17 37 1101 23%

Colum bus, OH 76 125 29 5 11 26 55 2087 37%

Pittsburgh, PA 44 126 21 5 5 13 45 1510 25%

Post-Work

Post-Clean

PostVerification
C-12 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7

Figure C2.3a. Box Plots of Floor Dust Lead Loading in the Work Room by Stage and Job 

Type 

Table C2.3a. Descriptive Summary of Floor Dust Lead Loading in the Work Room by 

Stage and Job Type 

Stage

W ork Room - Floor 

Dust (Job Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I1-Cut Outs 48 1096 422 5 117 575 1649 4524 94%

I2-Replace Window s 32 10041 3993 113 1262 6770 15424 61134 100%

I3-Scrape Surface * 32 7489 2686 69 1289 2977 5534 48440 100%

I4-Scrape Door * 32 45578 32644 4999 19877 31649 45441 209798 100%

I5-Heat gun < 1100° 16 11157 2080 65 310 2567 9620 65994 100%

I6-Heat gun > 1100° * 48 28261 7737 51 2812 7791 35626 180281 100%

I7-Kitchen 33 3778 958 5 222 1896 3513 20074 88%

I1-Cut Outs 48 19 11 5 5 11 18 112 10%

I2-Replace Window s 32 109 81 18 48 90 158 412 78%

I3-Scrape Surface * 32 81 49 5 28 47 99 347 59%

I4-Scrape Door * 32 432 225 35 114 157 389 2347 97%

I5-Heat gun < 1100° 16 50 28 5 14 28 52 289 38%

I6-Heat gun > 1100° * 48 800 120 5 23 87 1150 6420 65%

I7-Kitchen 32 45 25 5 5 31 69 162 41%

I1-Cut Outs 48 12 8 5 5 5 11 124 2%

I2-Replace Window s 32 65 49 16 27 41 91 212 59%

I3-Scrape Surface * 32 39 28 5 17 33 55 137 44%

I4-Scrape Door * 32 284 136 18 58 140 343 2583 81%

I5-Heat gun < 1100° 16 26 18 5 8 18 40 102 25%

I6-Heat gun > 1100° * 48 549 85 5 8 94 496 5206 63%

I7-Kitchen 32 37 13 5 5 5 27 326 19%

Post-Clean

Post-Work

PostVerification

* Indicates job is restricted 
C-13 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7

Figure C2.3b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and Job 

Type 

Table C2.3b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room by Stage 

and Job Type 

Stage

Tool Room - Floor 

Dust (Job Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I1-Cut Outs 28 33 21 5 12 19 45 152 36%

I2-Replace Window s 16 67 32 5 15 22 45 345 25%

I3-Scrape Surface * 16 94 49 5 28 42 98 567 50%

I4-Scrape Door * 16 1415 425 51 102 250 1537 9031 100%

I5-Heat gun < 1100° 12 44 24 5 15 19 51 190 25%

I6-Heat gun > 1100° * 28 748 84 5 14 59 624 8667 57%

I7-Kitchen 16 79 23 5 5 18 63 429 31%

I1-Cut Outs 28 27 18 5 11 20 41 81 25%

I2-Replace Window s 16 112 51 5 29 41 91 869 50%

I3-Scrape Surface * 16 80 48 5 25 54 98 283 69%

I4-Scrape Door * 16 1627 395 28 103 365 1311 13167 94%

I5-Heat gun < 1100° 12 41 33 11 22 33 61 98 33%

I6-Heat gun > 1100° * 28 651 89 5 11 60 984 3553 61%

I7-Kitchen 16 113 23 5 5 16 55 1033 25%

I1-Cut Outs 28 1462 30 5 12 19 35 26266 21%

I2-Replace Window s 16 112 53 16 23 35 70 599 44%

I3-Scrape Surface * 16 125 55 5 46 58 82 1122 81%

I4-Scrape Door * 16 1132 313 14 109 272 1097 6902 94%

I5-Heat gun < 1100° 12 51 35 13 17 38 67 211 42%

I6-Heat gun > 1100° * 28 461 94 5 14 90 663 3963 61%

I7-Kitchen 16 48 17 5 5 13 32 398 19%

Post-Work

Post-Clean

PostVerification

* Indicates job is restricted 
C-14 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7

Figure C2.3c. Box Plots of Floor Dust Lead Loading in the Observation Room by Stage and 

Job Type 

Table C2.3c. Descriptive Summary of Floor Dust Lead Loading in the Observation Room 

by Stage and Job Type 

Stage

Obs. Room - Floor 

Dust (Job Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I1-Cut Outs 24 19 12 5 5 5 31 78 13%

I2-Replace Window s 16 32 14 5 5 12 19 189 13%

I3-Scrape Surface * 16 71 28 5 15 21 43 452 38%

I4-Scrape Door * 16 625 173 16 44 86 661 2674 81%

I5-Heat gun < 1100° 8 37 27 11 15 26 42 119 25%

I6-Heat gun > 1100° * 24 136 35 5 5 34 156 863 46%

I7-Kitchen 16 11 7 5 5 5 5 85 6%

I1-Cut Outs 24 25 12 5 5 9 25 280 4%

I2-Replace Window s 16 55 15 5 5 12 19 632 13%

I3-Scrape Surface * 16 41 28 5 20 24 37 185 25%

I4-Scrape Door * 16 561 156 16 41 95 524 2841 75%

I5-Heat gun < 1100° 8 31 28 17 20 29 32 69 13%

I6-Heat gun > 1100° * 24 201 41 5 5 31 295 1101 46%

I7-Kitchen 16 21 10 5 5 5 14 162 6%

I1-Cut Outs 24 18 11 5 5 8 24 81 8%

I2-Replace Window s 16 25 17 5 8 18 34 85 19%

I3-Scrape Surface * 16 47 34 5 20 33 70 152 44%

I4-Scrape Door * 16 474 175 24 47 162 622 2087 81%

I5-Heat gun < 1100° 8 61 25 5 13 20 39 338 25%

I6-Heat gun > 1100° * 24 219 51 5 14 39 194 1510 50%

I7-Kitchen 16 6 6 5 5 5 5 12 0%

Post-Work

Post-Clean

PostVerification

* Indicates job is restricted 
C-15 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

C2 C3 C4 C2 C3 C4 C2 C3 C4

Figure C2.4a. Box Plots of Floor Dust Lead Loading in the Work Room by Stage and 

Contractor 

Table C2.4a. Descriptive Summary of Floor Dust Lead Loading in the Work Room by 

Stage and Contractor 

Stage

W ork Room - Floor 

Dust (Contractor)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C2 80 10284 2150 51 595 2685 5927 180281 100%

C3 73 21856 3971 5 909 11211 29248 209798 95%

C4 88 14927 2866 5 729 3136 18399 144393 97%

C2 80 175 27 5 8 27 52 6420 38%

C3 72 232 90 5 45 97 176 2347 76%

C4 88 349 55 5 15 46 149 3769 51%

C2 80 66 18 5 5 14 46 858 34%

C3 72 151 53 5 24 49 147 2583 53%

C4 88 282 34 5 5 25 102 5206 40%

Post-Work

Post-Clean

PostVerification
C-16 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

C2 C3 C4 C2 C3 C4 C2 C3 C4

Figure C2.4b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and 

Contractor 

Table C2.4b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room by Stage 

and Contractor 

Stage

Tool Room - Floor 

Dust (Contractor)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C2 52 69 35 5 15 33 98 567 46%

C3 36 659 81 5 16 59 256 9031 61%

C4 44 490 47 5 14 29 70 8667 36%

C2 52 61 35 5 13 40 79 283 50%

C3 36 771 91 5 20 68 365 13167 61%

C4 44 442 51 5 12 30 92 3553 41%

C2 52 69 35 5 15 35 75 910 44%

C3 36 1650 100 5 16 52 367 26266 56%

C4 44 322 57 5 13 54 255 3963 52%

Post-Work

Post-Clean

PostVerification
C-17 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

C2 C3 C4 C2 C3 C4 C2 C3 C4

Figure C2.4c. Box Plots of Floor Dust Lead Loading in the Observation Room by Stage and 

Contractor 

Table C2.4c. Descriptive Summary of Floor Dust Lead Loading in the Observation Room 

by Stage and Contractor 

Stage

Obs. Room - Floor 

Dust (Contractor)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C2 40 49 25 5 11 28 46 452 33%

C3 36 292 34 5 5 28 125 2674 42%

C4 44 77 17 5 5 11 25 863 23%

C2 40 35 22 5 16 25 33 280 20%

C3 36 273 32 5 5 17 98 2841 39%

C4 44 121 25 5 5 17 37 1101 23%

C2 40 39 25 5 15 25 45 338 33%

C3 36 220 34 5 5 28 107 2087 42%

C4 44 126 21 5 5 13 45 1510 25%

Post-Work

Post-Clean

PostVerification
C-18 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36

Figure C2.5a. Box Plots of Floor Dust Lead Loading in the Work Room by Stage and 

Housing Unit 
C-19 

Table C2.5a. Descriptive Summary of Floor Dust Lead Loading in the Work Room by 

Stage and Housing Unit 

Stage

W ork Room - Floor 

Dust (Housing Unit)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C01 48 4808 1103 51 283 1326 3009 65994 100%

H03 16 6900 2847 69 1289 3652 5829 48440 100%

H08 28 26964 6123 90 910 11612 36280 209798 100%

H09 40 28160 9180 113 3793 11422 29641 180281 100%

H10 16 52416 39983 5774 25294 39067 77373 144393 100%

H16 24 6232 1169 5 283 1747 4349 61134 92%

H17 32 7245 1651 12 465 1910 6027 44197 97%

H31 4 5491 3700 1433 1862 3151 9120 14229 100%

H32 4 4154 1125 162 321 948 7987 14560 100%

H33 4 2035 1655 481 1188 2260 2881 3139 100%

H35 21 9315 1051 5 55 2940 17936 33363 81%

H36 4 11698 4628 137 5154 13290 18241 20074 100%

C01 48 27 14 5 5 13 30 289 17%

H03 16 70 37 5 23 41 55 347 56%

H08 28 282 108 5 54 101 163 1615 82%

H09 40 462 138 19 57 106 195 6420 88%

H10 16 1653 1003 52 676 1796 2564 3769 100%

H16 24 49 17 5 5 14 45 412 25%

H17 32 77 47 5 19 48 114 260 50%

H31 4 46 45 31 39 47 53 59 75%

H32 4 65 37 5 18 57 111 140 50%

H33 4 45 41 28 28 37 63 80 50%

H35 20 98 42 5 11 64 135 320 50%

H36 4 5 5 5 5 5 5 5 0%

C01 48 13 8 5 5 5 13 102 8%

H03 16 35 25 5 14 41 50 74 56%

H08 28 132 63 5 29 50 181 644 54%

H09 40 248 97 16 37 75 251 2583 73%

H10 16 1384 684 97 175 957 1933 5206 100%

H16 24 27 12 5 5 5 40 194 29%

H17 32 45 27 5 14 25 68 212 31%

H31 4 11 8 5 5 5 16 27 0%

H32 4 5 5 5 5 5 5 5 0%

H33 4 42 29 14 15 23 70 110 25%

H35 20 67 26 5 5 28 124 253 40%

H36 4 90 23 5 8 14 171 326 25%

PostVerification

Post-Work

Post-Clean
C-20 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36

Figure C2.5b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and 

Housing Unit 
C-21 

Table C2.5b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room by Stage 

and Housing Unit 

Stage

Tool Room - Floor 

Dust (Housing Unit)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C01 36 36 22 5 13 18 45 190 28%

H03 8 160 107 34 50 98 192 567 88%

H08 14 1063 113 5 18 135 257 9031 71%

H09 20 384 100 5 45 97 219 4054 75%

H10 8 2468 1382 67 1003 1767 2737 8667 100%

H16 12 12 10 5 5 8 19 31 0%

H17 16 27 20 5 14 25 35 70 19%

H31 2 42 40 29 29 42 56 56 50%

H32 2 152 101 38 38 152 265 265 50%

H33 2 368 363 307 307 368 429 429 100%

H35 10 216 39 5 13 21 116 1508 40%

H36 2 47 40 23 23 47 71 71 50%

C01 36 31 22 5 11 23 47 98 31%

H03 8 132 112 51 75 98 189 283 100%

H08 14 1381 109 5 15 92 390 13167 57%

H09 20 385 116 5 58 112 210 3509 90%

H10 8 2127 1860 569 1435 2020 2992 3553 100%

H16 12 20 13 5 5 15 25 83 8%

H17 16 31 22 5 12 30 46 74 31%

H31 2 21 19 13 13 21 29 29 0%

H32 2 10 9 5 5 10 16 16 0%

H33 2 251 175 71 71 251 431 431 100%

H35 10 171 40 5 18 26 48 1146 30%

H36 2 567 323 101 101 567 1033 1033 100%

C01 36 35 24 5 13 21 39 211 22%

H03 8 66 50 5 47 59 97 117 88%

H08 14 3796 291 5 29 258 4151 26266 71%

H09 20 364 115 16 35 90 261 2892 75%

H10 8 1357 1084 608 663 805 1672 3963 100%

H16 12 70 18 5 5 12 50 599 25%

H17 16 111 41 5 26 54 70 1122 56%

H31 2 26 26 22 22 26 31 31 0%

H32 2 59 24 5 5 59 112 112 50%

H33 2 44 20 5 5 44 83 83 50%

H35 10 79 22 5 5 14 45 400 30%

H36 2 216 115 33 33 216 398 398 50%

PostVerification

Post-Work

Post-Clean
C-22 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36

Figure C2.5c. Box Plots of Floor Dust Lead Loading in the Observation Room by Stage and 

Housing Unit 
C-23 

Table C2.5c. Descriptive Summary of Floor Dust Lead Loading in the Observation Room 

by Stage and Housing Unit 

Stage

Obs. Room - Floor 

Dust (Housing Unit)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C01 24 26 17 5 8 17 34 119 17%

H03 8 128 66 16 34 43 202 452 75%

H08 14 396 42 5 5 41 90 2564 50%

H09 20 221 38 5 12 37 75 2674 40%

H10 8 364 271 61 156 270 569 863 100%

H16 12 8 7 5 5 5 9 24 0%

H17 16 17 12 5 5 13 18 78 6%

H31 2 5 5 5 5 5 5 5 0%

H32 2 5 5 5 5 5 5 5 0%

H33 2 5 5 5 5 5 5 5 0%

H35 10 83 16 5 5 5 41 391 30%

H36 2 45 21 5 5 45 85 85 50%

C01 24 32 18 5 5 24 29 280 8%

H03 8 41 34 16 22 28 52 107 38%

H08 14 448 46 5 5 39 108 2841 50%

H09 20 163 31 5 5 25 84 1421 40%

H10 8 558 460 149 295 495 819 1101 100%

H16 12 8 7 5 5 5 12 17 0%

H17 16 31 21 5 13 20 31 185 6%

H31 2 5 5 5 5 5 5 5 0%

H32 2 84 28 5 5 84 162 162 50%

H33 2 21 14 5 5 21 37 37 0%

H35 10 60 17 5 5 8 31 322 20%

H36 2 14 14 12 12 14 17 17 0%

C01 24 35 19 5 11 21 33 338 21%

H03 8 57 49 14 38 51 85 96 75%

H08 14 379 48 5 5 44 211 2087 50%

H09 20 110 36 5 20 33 64 927 40%

H10 8 607 429 105 194 542 883 1510 100%

H16 12 9 7 5 5 5 11 26 0%

H17 16 32 21 5 13 20 35 152 19%

H31 2 5 5 5 5 5 5 5 0%

H32 2 5 5 5 5 5 5 5 0%

H33 2 5 5 5 5 5 5 5 0%

H35 10 67 17 5 5 10 26 381 20%

H36 2 8 8 5 5 8 12 12 0%

Post-Work

Post-Clean

PostVerification
C-24 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

Yes No Yes No Yes No

Figure C2.6a. Box Plots of Floor Dust Lead Loading in the Work Room by Stage and Rule 

Plastic Use 

Table C2.6a. Descriptive Summary of Floor Dust Lead Loading in the Work Room by 

Stage and Rule Plastic Use 

Stage

W ork Room - Floor 

Dust (Plastic)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 121 12946 2854 5 1122 3146 17936 87849 95%

2-no 120 18045 2897 12 566 3139 15622 209798 99%

1-yes 120 121 41 5 13 46 116 2020 56%

2-no 120 391 62 5 16 54 158 6420 53%

1-yes 120 88 26 5 5 27 59 2002 40%

2-no 120 253 38 5 5 31 111 5206 43%

PostVerification

Post-Work

Post-Clean
C-25 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

Yes No Yes No Yes No

Figure C2.6b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and Rule 

Plastic Use 

Table C2.6b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room by Stage 

and Rule Plastic Use 

Stage

Tool Room - Floor 

Dust (Plastic)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 66 296 41 5 14 30 116 8667 42%

2-no 66 445 57 5 16 41 152 9031 52%

1-yes 66 183 43 5 16 43 98 2568 52%

2-no 66 580 61 5 16 40 145 13167 48%

1-yes 66 151 39 5 13 31 84 1802 45%

2-no 66 1018 79 5 18 57 238 26266 55%

PostVerification

Post-Work

Post-Clean
C-26 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

Yes No Yes No Yes No

Figure C2.6c. Box Plots of Floor Dust Lead Loading in the Observation Room by Stage and 

Rule Plastic Use 

Table C2.6c. Descriptive Summary of Floor Dust Lead Loading in the Observation Room 

by Stage and Rule Plastic Use 

Stage

Obs. Room - Floor 

Dust (Plastic)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 60 50 18 5 5 14 41 452 27%

2-no 60 214 30 5 5 17 79 2674 37%

1-yes 60 49 17 5 5 16 33 457 22%

2-no 60 226 38 5 12 26 89 2841 32%

1-yes 60 55 22 5 5 24 47 593 30%

2-no 60 195 31 5 5 20 76 2087 35%

Post-Work

Post-Clean

PostVerification
C-27 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

Rule Base Rule Base Rule Base

Figure C2.7a. Box Plots of Floor Dust Lead Loading in the Work Room by Stage and 

Cleaning Type 

Table C2.7a. Descriptive Summary of Floor Dust Lead Loading in the Work Room by 

Stage and Cleaning Type 

Stage

W ork Room - Floor 

Dust (Cleaning)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-rule 120 16439 2575 5 472 3100 16431 166383 98%

2-base 121 14538 3209 5 911 3513 16511 209798 97%

1-rule 120 187 34 5 8 30 104 3769 41%

2-base 120 325 75 5 24 72 169 6420 68%

1-rule 120 184 27 5 5 22 90 5206 40%

2-base 120 157 36 5 8 31 100 2002 43%

PostVerification

Post-Work

Post-Clean
C-28 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

Rule Base Rule Base Rule Base

Figure C2.7b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and 

Cleaning Type 

Table C2.7b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room by Stage 

and Cleaning Type 

Stage

Tool Room - Floor 

Dust (Cleaning)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-rule 66 298 48 5 14 31 190 4054 45%

2-base 66 442 49 5 16 39 107 9031 48%

1-rule 66 301 49 5 11 46 115 3509 53%

2-base 66 462 53 5 18 36 98 13167 47%

1-rule 66 873 62 5 13 52 211 26266 55%

2-base 66 296 49 5 16 35 92 6902 45%

PostVerification

Post-Work

Post-Clean
C-29 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

Rule Base Rule Base Rule Base

Figure C2.7c. Box Plots of Floor Dust Lead Loading in the Observation Room by Stage and 

Cleaning Type 

Table C2.7c. Descriptive Summary of Floor Dust Lead Loading in the Observation Room 

by Stage and Cleaning Type 

Stage

Obs. Room - Floor 

Dust (Cleaning)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-rule 60 127 27 5 5 20 74 2674 37%

2-base 60 137 20 5 5 13 41 2564 27%

1-rule 60 116 26 5 5 20 37 1421 23%

2-base 60 159 25 5 5 23 55 2841 30%

1-rule 60 106 28 5 5 25 64 938 35%

2-base 60 144 24 5 5 20 47 2087 30%

Post-Work

Post-Clean

PostVerification
C-30 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

I II III IV I II III IV I II III IV

Figure C2.8a. Box Plots of Floor Dust Lead Loading in the Work Room by Stage and Phase 

Table C2.8a. Descriptive Summary of Floor Dust Lead Loading in the Work Room by 

Stage and Phase 

Stage

W ork Room - Floor 

Dust (Phase)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I-Rule w / Plastic 60 14934 2797 5 533 3142 17514 87849 97%

II-Base w / Plastic 61 10990 2912 5 1433 3513 17936 61134 93%

III-Rule w /o Plastic 60 17945 2370 12 415 2691 14893 166383 98%

IV-Base w /o Plastic 60 18145 3542 84 875 3470 15622 209798 100%

I-Rule w / Plastic 60 69 32 5 5 40 98 493 50%

II-Base w / Plastic 60 173 54 5 16 50 144 2020 62%

III-Rule w /o Plastic 60 306 37 5 12 22 115 3769 32%

IV-Base w /o Plastic 60 477 105 5 39 87 191 6420 73%

I-Rule w / Plastic 60 55 24 5 5 27 62 428 43%

II-Base w / Plastic 60 121 29 5 8 27 59 2002 37%

III-Rule w /o Plastic 60 314 32 5 5 18 108 5206 37%

IV-Base w /o Plastic 60 193 45 5 8 40 119 1864 50%

Post-Clean

Post-Work

PostVerification
C-31 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

I II III IV I II III IV I II III IV

Figure C2.8b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and Phase 

Table C2.8b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room by Stage 

and Phase 

Stage

Tool Room - Floor 

Dust (Phase)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I-Rule w / Plastic 33 229 41 5 12 29 190 3101 39%

II-Base w / Plastic 33 363 41 5 16 33 67 8667 45%

III-Rule w /o Plastic 33 367 57 5 16 44 107 4054 52%

IV-Base w /o Plastic 33 522 58 5 18 41 152 9031 52%

I-Rule w / Plastic 33 196 43 5 5 46 115 2568 55%

II-Base w / Plastic 33 170 43 5 20 35 76 2421 48%

III-Rule w /o Plastic 33 406 56 5 17 47 101 3509 52%

IV-Base w /o Plastic 33 754 66 5 16 37 186 13167 45%

I-Rule w / Plastic 33 150 36 5 5 26 84 910 45%

II-Base w / Plastic 33 152 41 5 15 32 74 1802 45%

III-Rule w /o Plastic 33 1596 107 5 29 59 398 26266 64%

IV-Base w /o Plastic 33 440 58 5 17 37 117 6902 45%

Post-Work

Post-Clean

PostVerification
C-32 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

I II III IV I II III IV I II III IV

Figure C2.8c. Box Plots of Floor Dust Lead Loading in the Observation Room by Stage and 

Phase 

Table C2.8c. Descriptive Summary of Floor Dust Lead Loading in the Observation Room 

by Stage and Phase 

Stage

Obs. Room - Floor 

Dust (Phase)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I-Rule w/ Plastic 30 51 19 5 5 14 54 379 30%

II-Base w/ Plastic 30 49 17 5 5 13 39 452 23%

III-Rule w/o Plastic 30 202 39 5 11 31 96 2674 43%

IV-Base w/o Plastic 30 226 24 5 5 13 49 2564 30%

I-Rule w/ Plastic 30 50 16 5 5 14 31 372 20%

II-Base w/ Plastic 30 48 18 5 5 20 33 457 23%

III-Rule w/o Plastic 30 182 42 5 17 26 89 1421 27%

IV-Base w/o Plastic 30 271 34 5 5 26 89 2841 37%

I-Rule w/ Plastic 30 60 20 5 5 24 45 593 30%

II-Base w/ Plastic 30 51 23 5 5 24 48 338 30%

III-Rule w/o Plastic 30 153 37 5 11 33 85 938 40%

IV-Base w/o Plastic 30 237 26 5 5 17 45 2087 30%

Post-Work

Post-Clean

PostVerification
C-33 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

Yes No Yes No Yes No

Figure C2.9a. Box Plots of Floor Dust Lead Loading in the Work Room by Stage and 

Restricted Job 

Table C2. 9a. Descriptive Summary of Floor Dust Lead Loading in the Work Room by 

Stage and Restricted Job 

Stage

Work Room - Floor 

Dust (Restricted Job)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 112 27274 8629 51 2950 12668 35557 209798 100%

2-no 129 5249 1108 5 252 1433 4010 65994 95%

1-yes 112 489 111 5 36 104 281 6420 72%

2-no 128 52 26 5 8 26 74 412 38%

1-yes 112 328 70 5 20 59 194 5206 63%

2-no 128 33 16 5 5 14 38 326 23%

PostVerification

Post-Work

Post-Clean
C-34 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

Yes No Yes No Yes No

Figure C2.9b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and 

Restricted Job 

Table C2. 9b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room by Stage 

and Restricted Job 

Stage

Tool Room - Floor 

Dust (Restricted Job)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 60 751 112 5 28 83 365 9031 67%

2-no 72 53 24 5 13 20 45 429 31%

1-yes 60 759 113 5 26 94 382 13167 72%

2-no 72 67 27 5 13 28 52 1033 32%

1-yes 60 550 112 5 36 87 504 6902 75%

2-no 72 613 31 5 13 24 59 26266 29%

PostVerification

Post-Work

Post-Clean
C-35 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

Yes No Yes No Yes No

Figure C2.9c. Box Plots of Floor Dust Lead Loading in the Observation Room by Stage and 

Restricted Job 

Table C2. 9c. Descriptive Summary of Floor Dust Lead Loading in the Observation Room 

by Stage and Restricted Job 

Stage

Obs. Room - Floor 

Dust (Restricted Job)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 56 257 52 5 14 41 191 2674 54%

2-no 64 23 12 5 5 5 26 189 13%

1-yes 56 258 54 5 19 34 186 2841 48%

2-no 64 32 13 5 5 12 26 632 8%

1-yes 56 243 65 5 23 45 189 2087 57%

2-no 64 22 12 5 5 11 24 338 11%

Post-Work

Post-Clean

PostVerification
C-36 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

T VT W T VT W T VT W

Figure C2.10a. Box Plots of Floor Dust Lead Loading in the Work Room by Stage 

and Work Room Floor Type 

Table C2. 10a. Descriptive Summary of Floor Dust Lead Loading in the Work Room 

by Stage and Work Room Floor Type 

Stage

Work Room - Floor 

Dust (Floor Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Tile 69 6180 1087 5 220 1443 3676 65994 94%

Vinyl Tile 84 12099 1991 5 474 2351 11612 209798 96%

Wood 88 26012 8760 69 2977 11422 30876 180281 100%

Tile 68 48 20 5 5 16 45 320 26%

Vinyl Tile 84 124 38 5 13 38 104 1615 49%

Wood 88 543 140 5 45 98 314 6420 81%

Tile 68 29 12 5 5 5 25 253 18%

Vinyl Tile 84 61 21 5 5 18 50 644 26%

Wood 88 385 99 5 39 72 203 5206 75%

Post-Work

Post-Clean

PostVerification
C-37 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

T VT W T VT W T VT W

Figure C2.10b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and 

Work Room Floor Type 

Table C2. 10b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room 

by Stage and Work Room Floor Type 

Stage

Tool Room - Floor 

Dust (Floor Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Tile 46 75 25 5 13 19 45 1508 30%

Vinyl Tile 42 393 38 5 5 29 71 9031 43%

Wood 44 657 123 5 31 90 335 8667 68%

Tile 46 62 25 5 12 24 47 1146 30%

Vinyl Tile 42 512 36 5 5 23 76 13167 40%

Wood 44 592 152 5 49 108 426 3553 80%

Tile 46 44 24 5 13 20 40 400 24%

Vinyl Tile 42 1322 56 5 11 37 138 26266 50%

Wood 44 445 131 5 41 87 604 3963 77%

Post-Work

Post-Clean

PostVerification
C-38 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

T VT W T VT W T VT W

Figure C2.10c. Box Plots of Floor Dust Lead Loading in the Observation Room by 

Stage and Work Room Floor Type 

Table C2. 10c. Descriptive Summary of Floor Dust Lead Loading in the Observation 

Room by Stage and Work Room Floor Type 

Stage

Obs. Room - Floor 

Dust (Floor Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Tile 34 43 17 5 5 15 36 391 21%

Vinyl Tile 42 142 15 5 5 5 26 2564 21%

Wood 44 192 47 5 13 40 158 2674 50%

Tile 34 40 18 5 5 22 30 322 12%

Vinyl Tile 42 166 19 5 5 14 37 2841 21%

Wood 44 186 44 5 13 30 128 1421 43%

Tile 34 44 19 5 5 19 32 381 21%

Vinyl Tile 42 138 17 5 5 5 36 2087 21%

Wood 44 174 52 5 19 43 92 1510 52%

Post-Work

Post-Clean

PostVerification
C-39 

Post Work Post Cleaning Post Verification 

Work Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

PFG PFG PFG

Figure C2.11a. Box Plots of Floor Dust Lead Loading in the Work Room by Stage 

and Work Room Floor Condition 

Table C2. 11a. Descriptive Summary of Floor Dust Lead Loading in the Work Room 

by Stage and Work Room Floor Condition 

Stage

Work Room - Floor 

Dust (Floor Condition)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Poor 108 27342 8361 69 2817 11450 35557 209798 100%

Fair 45 8450 1833 5 481 2624 16409 33363 91%

Good 88 4529 977 5 252 1385 3308 65994 97%

Poor 108 509 138 5 50 104 296 6420 82%

Fair 44 77 37 5 12 39 118 320 50%

Good 88 36 17 5 5 15 35 289 22%

Poor 108 342 91 5 35 63 195 5206 70%

Fair 44 59 24 5 5 21 101 326 34%

Good 88 17 10 5 5 5 19 137 10%

Post-Work

Post-Clean

PostVerification
C-40 

Post Work Post Cleaning Post Verification 

Tool Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

PFG PFG PFG

Figure C2.11b. Box Plots of Floor Dust Lead Loading in the Tool Room by Stage and 

Work Room Floor Condition 

Table C2. 11b. Descriptive Summary of Floor Dust Lead Loading in the Tool Room 

by Stage and Work Room Floor Condition 

Stage

Tool Room - Floor 

Dust (Floor Condition)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Poor 54 809 138 5 39 105 345 9031 74%

Fair 22 157 46 5 16 30 116 1508 41%

Good 56 30 18 5 5 18 37 190 23%

Poor 54 838 156 5 51 112 569 13167 80%

Fair 22 161 43 5 18 29 71 1146 32%

Good 56 28 19 5 8 20 45 98 29%

Poor 54 1344 178 5 42 118 682 26266 80%

Fair 22 74 28 5 13 26 59 400 32%

Good 56 53 23 5 12 20 54 1122 29%

Post-Work

Post-Clean

PostVerification
C-41 

Post Work Post Cleaning Post Verification 

Obs. Room Floor Dust Lead ( g/sq ft)

1

10

100

1000

10000

PFG PFG PFG

Figure C2.11c. Box Plots of Floor Dust Lead Loading in the Observation Room by 

Stage and Work Room Floor Condition 

Table C2. 11c. Descriptive Summary of Floor Dust Lead Loading in the Observation 

Room by Stage and Work Room Floor Condition 

Stage

Obs. Room - Floor 

Dust (Floor Condition)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Poor 54 258 51 5 13 43 159 2674 54%

Fair 22 45 11 5 5 5 16 391 18%

Good 44 21 13 5 5 13 26 119 11%

Poor 54 266 48 5 12 34 149 2841 48%

Fair 22 42 15 5 5 12 31 322 14%

Good 44 28 15 5 5 19 28 280 7%

Poor 54 238 54 5 19 45 128 2087 54%

Fair 22 37 12 5 5 5 18 381 14%

Good 44 30 16 5 5 17 31 338 16%

Post-Clean

PostVerification

Post-Work
C-42 

C3. Exploratory Summaries of Floor Dust Lead Dust Loadings vs. Select 

Continuous Characteristics 

Scatter plots of the dust lead Loadings recorded from floors are presented in this section to 

illustrate and summarize the distribution of these factors as a function of select characteristics. 

The fitted linear regression line (using untransformed data) is displayed in each plot along with 

its associated r-square value. 

The selected characteristics are as follows: 

5. Paint Lead Concentration 

6. Floor Dust Lead Loading at Clearance 

7. Initial Average Soil Lead Concentration 

8. Final Average Soil Lead Concentration 

9. Disturbed Area 

10. Avg. Floor Dust Lead (with Bulk) in Post-Work Work Room 
C-43 

Work Room Floor Dust (PW)

1

10

100

1000

10000

100000

1000000

Average Paint Lead Concentration (ppm) (R-Square = 10.52%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

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1

10

100

1000

10000

Average Paint Lead Concentration (ppm) (R-Square = 14.73%)

1 2 3 4 5 6 7 8 9 10 11 12 13

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1

10

100

1000

10000

Average Paint Lead Concentration (ppm) (R-Square = 10.19%)

1 2 3 4 5 6 7 8 9 10 11 12 13

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Figure C3.1a. Scatter Plots of Work Floor Dust Lead Loading by Stage and Average Paint 

Lead Concentration 
C-44 

Tool Room Floor Dust (PW)

1

10

100

1000

10000

Average Paint Lead Concentration (ppm) (R-Square = 1.22%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

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o

o

o

o

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o

o

o

o

Tool Room Floor Dust (PC)

1

10

100

1000

10000

100000

Average Paint Lead Concentration (ppm) (R-Square = 1.61%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

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o

o

o

o

o

ooo oo

Tool Room Floor Dust (PV)

1

10

100

1000

10000

100000

Average Paint Lead Concentration (ppm) (R-Square = 0.17%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

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Figure C3.1b. Scatter Plots of Tool Floor Dust Lead Loading by Stage and Average Paint 

Lead Concentration 
C-45 

Obs. Room Floor Dust (PW)

1

10

100

1000

10000

Average Paint Lead Concentration (ppm) (R-Square = 2.62%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

o

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o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

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Obs. Room Floor Dust (PC)

1

10

100

1000

10000

Average Paint Lead Concentration (ppm) (R-Square = 3.79%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

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o

o

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Obs. Room Floor Dust (PV)

1

10

100

1000

10000

Average Paint Lead Concentration (ppm) (R-Square = 5.7%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

oo

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o

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Figure C3.1c. Scatter Plots of Observation Floor Dust Lead Loading by Stage and Average 

Paint Lead Concentration 
C-46 

Work Room Floor Dust (PW)

1

10

100

1000

10000

100000

1000000

Average Floor Dust Lead Loading at Clearance (R-Square = 1.62%)

1 10 100 1000

o

o

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Work Room Floor Dust (PC)

1

10

100

1000

10000

Average Floor Dust Lead Loading at Clearance (R-Square = 0%)

1 10 100 1000

o

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o

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Work Room Floor Dust (PV)

1

10

100

1000

10000

Average Floor Dust Lead Loading at Clearance (R-Square = 0.3%)

1 10 100 1000

o

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Figure C3.2a. Scatter Plots of Work Floor Dust Lead Loading by Stage and Floor Dust 

Lead Loading at Clearance 
C-47 

Tool Room Floor Dust (PW)

1

10

100

1000

10000

Average Floor Dust Lead Loading at Clearance (R-Square = 0.05%)

1 10 100 1000

o

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o

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Tool Room Floor Dust (PC)

1

10

100

1000

10000

100000

Average Floor Dust Lead Loading at Clearance (R-Square = 0%)

1 10 100 1000

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Tool Room Floor Dust (PV)

1

10

100

1000

10000

100000

Average Floor Dust Lead Loading at Clearance (R-Square = 0.14%)

1 10 100 1000

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Figure C3.2b. Scatter Plots of Tool Floor Dust Lead Loading by Stage and Floor Dust Lead 

Loading at Clearance 
C-48 

Obs. Room Floor Dust (PW)

1

10

100

1000

10000

Average Floor Dust Lead Loading at Clearance (R-Square = 0.02%)

1 10 100 1000

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Obs. Room Floor Dust (PC)

1

10

100

1000

10000

Average Floor Dust Lead Loading at Clearance (R-Square = 0.02%)

1 10 100 1000

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Obs. Room Floor Dust (PV)

1

10

100

1000

10000

Average Floor Dust Lead Loading at Clearance (R-Square = 0.45%)

1 10 100 1000

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Figure C3.2c. Scatter Plots of Observation Floor Dust Lead Loading by Stage and Floor 

Dust Lead Loading at Clearance 
C-49 

Work Room Floor Dust (PW)

1

10

100

1000

10000

100000

1000000

Average Initial Soil Lead Loading (R-Square = 0.77%)

0 1000 2000 3000 4000 5000 6000

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o

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Work Room Floor Dust (PC)

1

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 1.37%)

0 1000 2000 3000 4000 5000 6000

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Work Room Floor Dust (PV)

1

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 0.53%)

0 1000 2000 3000 4000 5000 6000

o

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Figure C3.3a. Scatter Plots of Work Floor Dust Lead Loading by Stage and Initial Average 

Soil Lead Concentration 
C-50 

Tool Room Floor Dust (PW)

1

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 0.39%)

0 1000 2000 3000 4000 5000 6000

o

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Tool Room Floor Dust (PC)

1

10

100

1000

10000

100000

Average Initial Soil Lead Loading (R-Square = 0.58%)

0 1000 2000 3000 4000 5000 6000

o

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Tool Room Floor Dust (PV)

1

10

100

1000

10000

100000

Average Initial Soil Lead Loading (R-Square = 1.38%)

0 1000 2000 3000 4000

o

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Figure C3.3b. Scatter Plots of Tool Floor Dust Lead Loading by Stage and Initial Average 

Soil Lead Concentration 
C-51 

Obs. Room Floor Dust (PW)

1

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 0.88%)

0 1000 2000 3000 4000 5000 6000

o

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o

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Obs. Room Floor Dust (PC)

1

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 1.03%)

0 1000 2000 3000 4000 5000 6000

o

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Obs. Room Floor Dust (PV)

1

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 1.02%)

0 1000 2000 3000 4000 5000 6000

o

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o

o

o

o

oo

o

o o

o

o

o

o

o

o

o

Figure C3.3c. Scatter Plots of Observation Floor Dust Lead Loading by Stage and Initial 

Average Soil Lead Concentration 
C-52 

Work Room Floor Dust (PW)

1

10

100

1000

10000

100000

1000000

Average Final Soil Lead Loading (R-Square = 3.61%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

oo

ooo

o

o

o

o

oo

o

o

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o

o

o

o

o

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o

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o

o

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o

o

o

o

o

o

o

o

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o

o

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o

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o

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o

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o

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o

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o

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o

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o

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o

oooo

oo

o

o

o

o

oo

o

oo

o o

o

oo

o

ooo

o

o

o

o

Work Room Floor Dust (PC)

1

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 6.33%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

ooo

o

oo

o

o

o

o

o

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o o

o

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o

o

o

o

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o

o

o

o

o

o

o

o

o

Work Room Floor Dust (PV)

1

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 0.63%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

oo

o

o

o

o

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o

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o

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o

o

oo

o

Figure C3.4a. Scatter Plots of Work Floor Dust Lead Loading by Stage and Final Average 

Soil Lead Concentration 
C-53 

Tool Room Floor Dust (PW)

1

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 0.24%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

o

o

o

o

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o

o

o

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o

o

o

o

o

o

o

oo o

o

oo

o

o

Tool Room Floor Dust (PC)

1

10

100

1000

10000

100000

Average Final Soil Lead Loading (R-Square = 0.64%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

o

o

o

o

o

o

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o

o

o

o

o

o

o

o

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o

o

o

o

o

o

o

oo

oo

Tool Room Floor Dust (PV)

1

10

100

1000

10000

100000

Average Final Soil Lead Loading (R-Square = 0.81%)

0 1000 2000 3000 4000 5000

o

o

oo

o

o

o

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o

o oo

Figure C3.4b. Scatter Plots of Tool Floor Dust Lead Loading by Stage and Final Average 

Soil Lead Concentration 
C-54 

Obs. Room Floor Dust (PW)

1

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 0.57%)

0 1000 2000 3000 4000 5000 6000 7000

oo

o

o

o

o

o

o

o

o

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o

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o

o

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o

o

o

o

o

o

o

o

o

o

o

o o

o

Obs. Room Floor Dust (PC)

1

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 1.07%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

o

o

o

o

o

o

o

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o

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o

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oo

o

o

o

Obs. Room Floor Dust (PV)

1

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 1.14%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

o

o

o

o

o

o

o

o

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o

o

o

o

o o

o

Figure C3.4c. Scatter Plots of Observation Floor Dust Lead Loading by Stage and Final 

Average Soil Lead Concentration 
C-55 

Work Room Floor Dust (PW)

1

10

100

1000

10000

100000

1000000

Disturbed Area (Sq. Feet) (R-Square = 1.3%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

oo

o

o

o

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o oo

o

o

Work Room Floor Dust (PC)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 3.87%)

0 10 20 30 40 50 60 70 80 90 100 110

o

ooo

o

o

o

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o

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Work Room Floor Dust (PV)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 2.7%)

0 10 20 30 40 50 60 70 80 90 100 110

oo

o

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o

Figure C3.5a. Scatter Plots of Work Floor Dust Lead Loading by Stage and Disturbed Area 

(ft2) 
C-56 

Tool Room Floor Dust (PW)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 0.78%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

oo

o

o

o

o

o

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o

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o

o

o

o

o

o

o

o

o

Tool Room Floor Dust (PC)

1

10

100

1000

10000

100000

Disturbed Area (Sq. Feet) (R-Square = 0.44%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

o

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o

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oo

oo

o

o

o

ooo

o

o

Tool Room Floor Dust (PV)

1

10

100

1000

10000

100000

Disturbed Area (Sq. Feet) (R-Square = 1.49%)

0 10 20 30 40 50 60 70 80 90

oo

o

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o

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Figure C3.5b. Scatter Plots of Tool Floor Dust Lead Loading by Stage and Disturbed Area 

(ft2) 
C-57 

Obs. Room Floor Dust (PW)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 0.21%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

o

oooo

o

o

o

oo

o

o

o

o

o

o

o

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o

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o

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o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Obs. Room Floor Dust (PC)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 0.16%)

0 10 20 30 40 50 60 70 80 90 100 110

o

ooo

o

o

o

o

o

o

o

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o

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o

o

o

o

o

o

o

o

o

o

o

o

oo

oo

o

o o

o

o

o

o

o

Obs. Room Floor Dust (PV)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 0.85%)

0 10 20 30 40 50 60 70 80 90 100 110

o

oo

o

ooo

o

o

oo

o

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Figure C3.5c. Scatter Plots of Observation Floor Dust Lead Loading by Stage and 

Disturbed Area (ft2) 
C-58 

Work Room Floor Dust (PW)

1

10

100

1000

10000

100000

1000000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 19.67%)

10 100 1000 10000 100000 1000000 10000000

o

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Work Room Floor Dust (PC)

1

10

100

1000

10000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 24.14%)

10 100 1000 10000 100000 1000000 10000000

oo

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Work Room Floor Dust (PV)

1

10

100

1000

10000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 15.88%)

10 100 1000 10000 100000 1000000 10000000

oo

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Figure C3.6a. Scatter Plots of Work Floor Dust Lead Loading by Stage and Avg. Floor 

Dust Lead (with Bulk) in Post-Work Work Room 
C-59 

Tool Room Floor Dust (PW)

1

10

100

1000

10000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 12.86%)

10 100 1000 10000 100000 1000000 10000000

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Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 13.1%)

10 100 1000 10000 100000 1000000 10000000

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Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 0.34%)

10 100 1000 10000 100000 1000000 10000000

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Figure C3.6b. Scatter Plots of Tool Floor Dust Lead Loading by Stage and Avg. Floor Dust 

Lead (with Bulk) in Post-Work Work Room 
C-60 

Obs. Room Floor Dust (PW)

1

10

100

1000

10000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 12.76%)

10 100 1000 10000 100000 1000000 10000000

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Obs. Room Floor Dust (PC)

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Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 14.92%)

10 100 1000 10000 100000 1000000 10000000

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10 100 1000 10000 100000 1000000 10000000

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Figure C3.6c. Scatter Plots of Observation Floor Dust Lead Loading by Stage and Avg. 

Floor Dust Lead (with Bulk) in Post-Work Work Room 

APPENDIX D 

DETAILED DESCRIPTIVE ANALYSES OF INTERIOR WINDOW 

SILL DUST LEAD LOADINGS 
D-1 

D1. Distribution Check for Sill Dust Lead Loadings 

Distribution of Non-Detectable Sill Lead Measurements 

Measurements recorded at or below the detection limit were set to half that limit for this analysis. 

Table D1.1 summarizes the frequency for these measurements. 

Table D1.1. Summary of Sill Dust Lead Loading Measurements (μg/ft2) Below Detection 

Limit Measurements by Room and Stage 

Room 

Stage Work Tool Observation 

Post-Work 6 (10.0%) 25 (41.7%) 35 (58.3%) 

Post-Cleaning 24 (40.0%) 22 (36.7%) 43 (71.7%) 

Post-Verification 34 (56.7%) 28 (46.7%) 43 (71.7%) 

Normality of the Sill Lead Measurement Distribution 

Prior to any analysis of the lead dust Loadings, the underlying distribution of the response data 

was examined for normality. Note that a Wilkes-Shapiro p-value < 0.001 indicates a significant 

departure from normality. With larger sample sizes, normality tests can indicate statistically 

significant but unimportant departures from normality. For the data collected for this study, the 

log-transformation of the data was accepted even when the Wilkes-Shapiro statistics indicated 

non-normality. With additional time, potential outliers and other influential points could be 

explored to determine if other data adjustments would be beneficial to the analyses. 
D-2 

Figures D1.1a and D1.1b summarize the distribution of the raw and natural log-transformed Sill 

dust lead measurements from the work room. Note that 118 (16%) of these measurements fell 

below the measurement detection level. 

0 30000 60000 90000 120000 150000 180000 210000 240000 270000

0

20

40

60

80

100

Percent

Lead Dust Loading (micrograms/sq ft)

Figure D1.1a. Histogram of Sill Dust Lead Loading Measurements (μg/ft2) in the Work 

Room Across All Stages (Wilkes-Shapiro p-value < 0.001) 

1.8 3 4.2 5.4 6.6 7.8 9 10.2 11.4 12.6

0

5

10

15

20

25

30

35

Percent

Log-Transformed Lead Dust Loading (micrograms/sq ft)

Figure D1.1b. Histogram of Log Transformed Sill Dust Lead Loading Measurements 

(μg/ft2

) in the Work Room Across All Stages (Wilkes-Shapiro p-value = < 

0.001)
D-3 

Figures C1.2a and C1.2b summarize the distribution of the raw and natural log-transformed Sill 

dust lead measurements from the tool room. Note that 56 (14%) of these measurements fell 

below the measurement detection level. 

0 1500 3000 4500 6000 7500 9000 10500 12000 13500 15000

0

20

40

60

80

100

Percent

Lead Dust Loading (micrograms/sq ft)

Figure D1.2a. Histogram of Sill Dust Lead Loading Measurements (μg/ft2) in the Tool 

Room Across All Stages (Wilkes-Shapiro p-value < 0.001) 

1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5

0

5

10

15

20

25

30

35

40

45

Percent

Log-Transformed Lead Dust Loading (micrograms/sq ft)

Figure D1.2b. Histogram of Log Transformed Sill Dust Lead Loading Measurements 

(μg/ft2

) in the Tool Room Across All Stages (Wilkes-Shapiro p-value = < 

0.001) 
D-4 

Figures C1.3a and C1.3b summarize the distribution of the raw and natural log-transformed Sill 

dust lead measurements from the observation room. Note that 115 (32%) of these measurements 

fell below the measurement detection level. 

1000 3000 5000 7000 9000 11000 13000 15000 17000 19000

0

20

40

60

80

100

Percent

Lead Dust Loading (micrograms/sq ft)

Figure D1.3a. Histogram of Sill Dust Lead Loading Measurements (μg/ft2) in the 

Observation Room Across All Stages (Wilkes-Shapiro p-value < 0.001) 

1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5

0

10

20

30

40

50

60

Percent

Log-Transformed Lead Dust Loading (micrograms/sq ft)

Figure D1.3b. Histogram of Log Transformed Sill Dust Lead Loading Measurements 

(μg/ft2

) in the Observation Room Across All Stages (Wilkes-Shapiro p-value 

= < 0.001) 
D-5 

D2. Exploratory Summaries of Sill Dust Lead Dust Loadings vs. Select 

Categorical Characteristics 

Box plots of the dust lead Loadings recorded from Sills as well as descriptive statistical summary 

tables are presented in this section to illustrate and summarize the distribution of these factors as 

a function of select characteristics. Box plots are a technique for displaying one-dimensional 

data and their summary characteristics. A box plot displays the median (represented by the 

center horizontal line), the 25th percentile (represented by the bottom of the box), and the 75th

percentile (represented by the top of the box). The vertical lines, or whiskers, are drawn from 

the box to the most extreme point within 1.5 * interquartile range. (An interquartile range is the 

distance between the 25th and the 75th percentiles.) Any value more extreme than this is 

identified individually with stars. The data are plotted using a log-base 10 scale. The summary 

statistics provided in the tables are sample size, arithmetic average, geometric average, 

minimum, 25th percentile, median, 75th percentile, maximum, and the percentage of 

measurements exceeding the federal standards for Sill lead of 250 μg/ft2

. 

The selected characteristics are as follows: 

17. Job intensity 

18. City 

19. Job type 

20. Contractor 

21. Housing unit 

22. Rule Plastic Use 

23. Cleaning Type 

24. Phase 

25. Restricted vs. non-restricted jobs 

26. Work room Floor Type 

27. Work room Floor condition
D-6 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

LMH LMH LMH

Figure D2.1a. Box Plots of Sill Dust Lead Loading Measured in the Work Room by Stage 

and Job Intensity Level 

Table D2.1a. Descriptive Summary of Sill Dust Lead Loading Measured in the Work 

Room by Stage and Job Intensity Level 

Stage

W ork Room - Sill 

Dust (Intensity)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-High 20 8299 486 20 84 353 2158 120227 55%

2-Medium 20 33749 2706 54 158 2301 33293 284914 70%

3-Low 20 5339 770 31 183 542 4152 57334 70%

1-High 20 1689 182 20 23 112 1179 18133 40%

2-Medium 20 366 126 5 26 144 282 2546 35%

3-Low 20 160 69 20 23 47 208 785 20%

1-High 20 348 74 20 23 30 161 2670 20%

2-Medium 19 452 77 5 25 58 116 3378 16%

3-Low 20 156 58 20 21 25 171 893 20%

PostVerification

Post-Work

Post-Clean
D-7 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

LMH LMH LMH

Figure D2.1b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and Job 

Intensity Level 

Table D2.1b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and Job Intensity Level 

Stage

Tool Room - Sill Dust 

(Intensity)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-High 20 472 97 20 22 37 330 3290 25%

2-Medium 20 947 129 19 25 123 316 14426 30%

3-Low 20 191 65 5 22 70 141 2182 10%

1-High 20 469 123 21 23 81 547 2714 30%

2-Medium 20 978 122 5 38 89 323 15001 30%

3-Low 20 101 51 16 21 26 136 504 10%

1-High 20 438 91 21 23 25 481 2449 30%

2-Medium 20 818 110 5 35 75 244 11894 25%

3-Low 20 230 55 16 21 25 132 2859 15%

PostVerification

Post-Work

Post-Clean
D-8 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

LMH LMH LMH

Figure D2.1c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

Job Intensity Level 

Table D2.1c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room by 

Stage and Job Intensity Level 

Stage

Obs. Room - Sill Dust 

(Intensity)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-High 20 1070 73 20 23 34 112 19074 15%

2-Medium 20 218 75 19 25 49 158 1367 20%

3-Low 20 98 41 20 21 26 53 673 10%

1-High 20 203 63 20 23 26 286 1350 25%

2-Medium 20 167 48 5 22 26 102 1597 15%

3-Low 20 55 31 19 20 23 27 453 5%

1-High 20 171 61 20 23 26 170 1173 15%

2-Medium 20 170 46 5 22 26 78 1449 15%

3-Low 20 41 29 20 21 24 27 267 5%

Post-Clean

PostVerification

Post-Work
D-9 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

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100

1000

10000

100000

1000000

OH PA OH PA OH PA

Figure D2.2a. Box Plots of Sill Dust Lead Loading in the Work Room by Stage and City 

Table D2.2a. Descriptive Summary of Sill Dust Lead Loading in the Work Room by Stage 

and City 

Stage

W ork Room - Sill 

Dust (City)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Colum bus, OH 38 17469 876 31 155 462 2724 284914 66%

Pittsburgh, PA 22 12906 1272 20 160 1139 12624 120227 64%

Colum bus, OH 38 297 91 5 23 98 278 2546 29%

Pittsburgh, PA 22 1501 178 20 26 141 612 18133 36%

Colum bus, OH 37 278 54 5 23 25 81 3378 14%

Pittsburgh, PA 22 381 105 20 26 86 282 2670 27%

PostVerification

Post-Work

Post-Clean
D-10 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

OH PA OH PA OH PA

Figure D2.2b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and City 

Table D2.2b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and City 

Stage

Tool Room - Sill Dust 

(City)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Colum bus, OH 38 581 71 5 21 25 209 14426 21%

Pittsburgh, PA 22 460 148 20 67 127 226 3290 23%

Colum bus, OH 38 556 72 5 21 54 175 15001 21%

Pittsburgh, PA 22 447 137 16 43 89 295 2714 27%

Colum bus, OH 38 542 70 5 21 23 175 11894 21%

Pittsburgh, PA 22 416 107 16 26 73 359 2449 27%

PostVerification

Post-Work

Post-Clean
D-11 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

OH PA OH PA OH PA

Figure D2.2c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

City 

Table D2.2c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room by 

Stage and City 

Stage

Obs. Room - Sill Dust 

(City)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Colum bus, OH 38 155 54 19 23 26 100 1367 13%

Pittsburgh, PA 22 993 76 20 25 34 102 19074 18%

Colum bus, OH 38 113 39 5 21 23 59 1597 11%

Pittsburgh, PA 22 191 61 20 20 26 227 1350 23%

Colum bus, OH 38 112 39 5 21 24 48 1449 11%

Pittsburgh, PA 22 154 53 20 20 26 168 1173 14%

Post-Work

Post-Clean

PostVerification
D-12 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7

Figure D2.3a. Box Plots of Sill Dust Lead Loading in the Work Room by Stage and Job 

Type 

Table D2.3a. Descriptive Summary of Sill Dust Lead Loading in the Work Room by Stage 

and Job Type 

Stage

W ork Room - Sill 

Dust (Job Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I1-Cut Outs 12 5151 348 31 73 319 798 57334 58%

I2-Replace Window s 8 5621 2535 168 847 4152 10852 13101 88%

I3-Scrape Surface * 8 5639 740 54 98 256 13435 17477 50%

I4-Scrape Door * 8 78551 31490 1622 18118 44022 108797 284914 100%

I5-Heat gun < 1100° 4 367 267 106 131 262 602 835 50%

I6-Heat gun > 1100° * 12 13472 1486 118 353 1004 4574 120227 83%

I7-Kitchen 8 540 91 20 30 51 166 3808 13%

I1-Cut Outs 12 81 44 20 21 26 76 417 8%

I2-Replace Window s 8 278 137 23 35 163 512 785 38%

I3-Scrape Surface * 8 101 43 5 24 26 118 467 13%

I4-Scrape Door * 8 728 378 104 149 278 1160 2546 63%

I5-Heat gun < 1100° 4 173 119 21 79 192 266 285 25%

I6-Heat gun > 1100° * 12 2636 289 21 23 212 1525 18133 50%

I7-Kitchen 8 269 91 20 28 68 263 1414 25%

I1-Cut Outs 12 58 35 20 21 23 41 277 8%

I2-Replace Window s 8 302 122 20 23 151 577 893 38%

I3-Scrape Surface * 8 38 27 5 24 26 42 115 0%

I4-Scrape Door * 8 1007 242 23 56 106 2167 3378 38%

I5-Heat gun < 1100° 3 75 58 21 21 70 133 133 0%

I6-Heat gun > 1100° * 12 547 116 21 23 52 859 2670 33%

I7-Kitchen 8 48 38 20 22 30 62 138 0%

Post-Clean

Post-Work

PostVerification

* Indicates job is restricted 
D-13 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7

Figure D2.3b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and Job Type 

Table D2.3b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and Job Type 

Stage

Tool Room - Sill Dust 

(Job Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I1-Cut Outs 12 80 57 21 21 71 141 166 0%

I2-Replace Window s 8 358 78 5 25 70 245 2182 25%

I3-Scrape Surface * 8 81 54 23 25 46 127 226 0%

I4-Scrape Door * 8 2236 450 21 190 499 1033 14426 75%

I5-Heat gun < 1100° 4 102 61 19 20 91 185 209 0%

I6-Heat gun > 1100° * 12 712 145 21 23 120 1053 3290 33%

I7-Kitchen 8 112 53 20 20 25 174 441 13%

I1-Cut Outs 12 76 45 16 21 23 136 240 0%

I2-Replace Window s 8 140 61 21 25 35 238 504 25%

I3-Scrape Surface * 8 70 47 5 26 60 116 152 0%

I4-Scrape Door * 8 2341 465 21 175 465 1211 15001 75%

I5-Heat gun < 1100° 4 70 58 21 39 64 102 133 0%

I6-Heat gun > 1100° * 12 660 151 21 23 95 1116 2714 33%

I7-Kitchen 8 182 90 21 46 81 191 798 25%

I1-Cut Outs 12 79 42 16 21 22 132 312 8%

I2-Replace Window s 8 456 82 21 25 40 321 2859 25%

I3-Scrape Surface * 8 189 56 5 25 53 107 1134 13%

I4-Scrape Door * 8 1814 307 44 69 197 1022 11894 50%

I5-Heat gun < 1100° 4 85 54 21 21 60 150 201 0%

I6-Heat gun > 1100° * 12 543 100 21 23 23 726 2449 33%

I7-Kitchen 8 280 78 21 22 53 238 1594 25%

Post-Work

Post-Clean

PostVerification

* Indicates job is restricted 
D-14 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7

Figure D2.3c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

Job Type 

Table D2.3c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room by 

Stage and Job Type 

Stage

Obs. Room - Sill Dust 

(Job Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I1-Cut Outs 12 24 23 20 21 23 26 29 0%

I2-Replace Window s 8 210 96 20 25 84 386 673 25%

I3-Scrape Surface * 8 87 42 23 25 26 61 453 13%

I4-Scrape Door * 8 438 208 44 59 158 831 1367 38%

I5-Heat gun < 1100° 4 41 31 19 20 22 62 100 0%

I6-Heat gun > 1100° * 12 1746 111 21 23 80 382 19074 25%

I7-Kitchen 8 55 39 20 23 26 70 184 0%

I1-Cut Outs 12 37 28 20 21 23 27 185 0%

I2-Replace Window s 8 81 37 19 20 25 44 453 13%

I3-Scrape Surface * 8 23 21 5 24 26 26 26 0%

I4-Scrape Door * 8 385 172 21 80 123 530 1597 38%

I5-Heat gun < 1100° 4 21 21 19 20 21 22 23 0%

I6-Heat gun > 1100° * 12 277 77 21 23 23 376 1350 33%

I7-Kitchen 8 92 47 20 23 26 134 345 13%

I1-Cut Outs 12 26 25 20 21 23 27 56 0%

I2-Replace Window s 8 63 38 20 21 25 63 267 13%

I3-Scrape Surface * 8 23 21 5 24 26 26 26 0%

I4-Scrape Door * 8 392 152 21 39 148 646 1449 38%

I5-Heat gun < 1100° 4 21 21 19 20 21 22 23 0%

I6-Heat gun > 1100° * 12 228 73 21 23 35 186 1173 17%

I7-Kitchen 8 85 45 20 23 26 105 354 13%

Post-Work

Post-Clean

PostVerification

* Indicates job is restricted 
D-15 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

C2 C3 C4 C2 C3 C4 C2 C3 C4

Figure D2.4a. Box Plots of Sill Dust Lead Loading in the Work Room by Stage and 

Contractor 

Table D2.4a. Descriptive Summary of Sill Dust Lead Loading in the Work Room by Stage 

and Contractor 

Stage

W ork Room - Sill 

Dust (Contractor)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C2 20 1525 432 54 136 366 975 14247 65%

C3 18 35185 1922 31 168 1414 33329 284914 67%

C4 22 12906 1272 20 160 1139 12624 120227 64%

C2 20 142 50 5 21 24 154 1352 15%

C3 18 469 180 21 50 149 417 2546 44%

C4 22 1501 178 20 26 141 612 18133 36%

C2 19 41 29 5 21 23 25 183 0%

C3 18 527 105 20 23 56 277 3378 28%

C4 22 381 105 20 26 86 282 2670 27%

Post-Work

Post-Clean

PostVerification
D-16 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

C2 C3 C4 C2 C3 C4 C2 C3 C4

Figure D2.4b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and 

Contractor 

Table D2.4b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and Contractor 

Stage

Tool Room - Sill Dust 

(Contractor)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C2 20 68 42 19 22 24 118 220 0%

C3 18 1152 128 5 21 122 668 14426 44%

C4 22 460 148 20 67 127 226 3290 23%

C2 20 60 41 5 23 35 70 198 0%

C3 18 1108 137 21 21 92 504 15001 44%

C4 22 447 137 16 43 89 295 2714 27%

C2 20 104 38 5 21 23 75 1134 5%

C3 18 1028 140 21 21 91 571 11894 39%

C4 22 416 107 16 26 73 359 2449 27%

Post-Work

Post-Clean

PostVerification
D-17 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

C2 C3 C4 C2 C3 C4 C2 C3 C4

Figure D2.4c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

Contractor 

Table D2.4c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room by 

Stage and Contractor 

Stage

Obs. Room - Sill Dust 

(Contractor)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C2 20 37 30 19 21 23 25 123 0%

C3 18 285 104 21 26 59 540 1367 28%

C4 22 993 76 20 25 34 102 19074 18%

C2 20 25 22 5 21 23 23 93 0%

C3 18 211 72 19 26 44 142 1597 22%

C4 22 191 61 20 20 26 227 1350 23%

C2 20 28 23 5 21 23 23 123 0%

C3 18 206 69 21 26 29 192 1449 22%

C4 22 154 53 20 20 26 168 1173 14%

Post-Work

Post-Clean

PostVerification
D-18 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36

Figure D2.5a. Box Plots of Sill Dust Lead Loading in the Work Room by Stage and 

Housing Unit 
D-19 

Table D2.5a. Descriptive Summary of Sill Dust Lead Loading in the Work Room by Stage 

and Housing Unit 

Stage

W ork Room - Sill 

Dust (Housing Unit)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C01 12 850 354 57 194 366 516 6424 67%

H03 4 3685 390 54 70 219 7300 14247 50%

H08 7 71276 7180 89 172 33257 124783 284914 71%

H09 10 13524 1765 118 488 1399 2724 92810 80%

H10 4 37180 5634 345 619 14074 73741 120227 100%

H16 6 13273 1472 20 197 5575 10937 57334 67%

H17 8 6437 1368 26 135 3999 12863 17477 63%

H31 1 50 50 50 50 50 50 50 0%

H32 1 51 51 51 51 51 51 51 0%

H33 1 160 160 160 160 160 160 160 0%

H35 5 943 191 31 33 50 1622 2980 40%

H36 1 3808 3808 3808 3808 3808 3808 3808 100%

C01 12 93 55 21 21 36 154 285 8%

H03 4 19 16 5 14 24 25 25 0%

H08 7 675 367 21 278 417 1414 1799 86%

H09 10 489 134 21 23 106 412 2546 40%

H10 4 7419 4067 1005 1351 5268 13486 18133 100%

H16 6 182 81 20 20 112 218 612 17%

H17 8 245 116 25 26 118 432 785 38%

H31 1 50 50 50 50 50 50 50 0%

H32 1 130 130 130 130 130 130 130 0%

H33 1 23 23 23 23 23 23 23 0%

H35 5 96 82 33 50 101 127 170 0%

H36 1 86 86 86 86 86 86 86 0%

C01 11 36 29 21 21 23 23 133 0%

H03 4 19 16 5 14 24 25 25 0%

H08 7 695 196 21 62 97 1708 2625 43%

H09 10 465 74 20 23 23 183 3378 20%

H10 4 1543 1367 790 859 1356 2227 2670 100%

H16 6 65 41 20 20 23 126 176 0%

H17 8 199 92 26 26 86 224 893 25%

H31 1 50 50 50 50 50 50 50 0%

H32 1 21 21 21 21 21 21 21 0%

H33 1 23 23 23 23 23 23 23 0%

H35 5 56 50 31 33 50 50 116 0%

H36 1 138 138 138 138 138 138 138 0%

PostVerification

Post-Work

Post-Clean
D-20 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36

Figure D2.5b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and Housing 

Unit 
D-21 

Table D2.5b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and Housing Unit 

Stage

Tool Room - Sill Dust 

(Housing Unit)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C01 12 67 43 19 21 23 118 209 0%

H03 4 24 24 23 24 25 25 25 0%

H08 7 2333 270 20 21 301 1072 14426 57%

H09 10 410 103 5 23 135 364 2182 30%

H10 4 1995 1688 661 1053 2014 2937 3290 100%

H16 6 85 72 20 59 87 126 129 0%

H17 8 104 80 26 47 77 167 226 0%

H31 1 441 441 441 441 441 441 441 100%

H32 1 216 216 216 216 216 216 216 0%

H33 1 23 23 23 23 23 23 23 0%

H35 5 150 42 21 21 21 21 668 20%

H36 1 131 131 131 131 131 131 131 0%

C01 12 53 39 21 23 23 64 175 0%

H03 4 38 26 5 15 38 60 70 0%

H08 7 2454 311 21 69 263 1345 15001 57%

H09 10 254 111 21 23 110 415 1076 30%

H10 4 1849 1696 1113 1116 1784 2582 2714 100%

H16 6 76 58 16 43 57 87 197 0%

H17 8 98 72 26 26 87 147 240 0%

H31 1 798 798 798 798 798 798 798 100%

H32 1 295 295 295 295 295 295 295 100%

H33 1 23 23 23 23 23 23 23 0%

H35 5 126 40 21 21 21 21 547 20%

H36 1 79 79 79 79 79 79 79 0%

C01 12 56 35 21 21 23 61 201 0%

H03 4 303 50 5 14 37 592 1134 25%

H08 7 1974 299 21 74 286 1112 11894 57%

H09 10 467 96 21 23 43 571 2859 30%

H10 4 1559 1308 604 726 1592 2392 2449 100%

H16 6 55 45 16 20 63 80 89 0%

H17 8 72 53 26 26 41 107 203 0%

H31 1 359 359 359 359 359 359 359 100%

H32 1 1594 1594 1594 1594 1594 1594 1594 100%

H33 1 23 23 23 23 23 23 23 0%

H35 5 43 34 21 21 21 44 109 0%

H36 1 21 21 21 21 21 21 21 0%

Post-Work

Post-Clean

PostVerification
D-22 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36

Figure D2.5c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

Housing Unit 
D-23 

Table D2.5c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room by 

Stage and Housing Unit 

Stage

Obs. Room - Sill Dust 

(Housing Unit)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

C01 12 32 27 19 21 23 23 100 0%

H03 4 24 24 23 24 25 25 25 0%

H08 7 243 70 21 26 44 162 1367 14%

H09 10 285 131 21 23 138 540 971 30%

H10 4 5139 979 102 371 690 9906 19074 75%

H16 6 30 26 20 20 20 26 76 0%

H17 8 96 51 25 26 26 94 453 13%

H31 1 20 20 20 20 20 20 20 0%

H32 1 42 42 42 42 42 42 42 0%

H33 1 184 184 184 184 184 184 184 0%

H35 5 167 61 26 26 28 65 691 20%

H36 1 99 99 99 99 99 99 99 0%

C01 12 22 22 19 21 22 23 24 0%

H03 4 19 16 5 14 24 25 25 0%

H08 7 271 64 21 21 29 142 1597 14%

H09 10 121 59 19 23 42 104 453 20%

H10 4 769 656 346 376 690 1162 1350 100%

H16 6 21 21 20 20 20 20 26 0%

H17 8 46 34 26 26 26 26 185 0%

H31 1 20 20 20 20 20 20 20 0%

H32 1 42 42 42 42 42 42 42 0%

H33 1 227 227 227 227 227 227 227 0%

H35 5 170 66 26 26 28 100 672 20%

H36 1 345 345 345 345 345 345 345 100%

C01 12 24 23 19 21 22 23 48 0%

H03 4 19 16 5 14 24 25 25 0%

H08 7 256 65 21 21 29 192 1449 14%

H09 10 159 67 21 23 62 123 887 20%

H10 4 608 435 173 186 543 1030 1173 50%

H16 6 21 21 20 20 20 20 26 0%

H17 8 30 29 26 26 26 26 56 0%

H31 1 20 20 20 20 20 20 20 0%

H32 1 42 42 42 42 42 42 42 0%

H33 1 168 168 168 168 168 168 168 0%

H35 5 102 46 26 26 26 28 405 20%

H36 1 354 354 354 354 354 354 354 100%

Post-Work

Post-Clean

PostVerification
D-24 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

Yes No Yes No Yes No

Figure D2.6a. Box Plots of Sill Dust Lead Loading in the Work Room by Stage and Rule 

Plastic Use 

Table D2.6a. Descriptive Summary of Sill Dust Lead Loading in the Work Room by Stage 

and Rule Plastic Use 

Stage

W ork Room - Sill 

Dust (Plastic)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 30 10961 867 20 168 490 10767 124783 70%

2-no 30 20630 1163 26 118 744 6613 284914 60%

1-yes 30 457 90 5 23 93 254 8839 27%

2-no 30 1020 151 21 25 141 417 18133 37%

1-yes 30 159 51 5 23 29 115 1708 10%

2-no 29 479 95 20 23 50 277 3378 28%

PostVerification

Post-Work

Post-Clean
D-25 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

Yes No Yes No Yes No

Figure D2.6b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and Rule 

Plastic Use 

Table D2.6b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and Rule Plastic Use 

Stage

Tool Room - Sill Dust 

(Plastic)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 30 235 79 20 23 75 191 2583 20%

2-no 30 839 111 5 23 100 226 14426 23%

1-yes 30 214 67 5 23 48 152 1345 20%

2-no 30 819 124 16 26 87 263 15001 27%

1-yes 30 269 65 5 21 35 99 2859 23%

2-no 30 722 103 16 23 75 203 11894 23%

PostVerification

Post-Work

Post-Clean
D-26 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

Yes No Yes No Yes No

Figure D2.6c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

Rule Plastic Use 

Table D2.6c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room by 

Stage and Rule Plastic Use 

Stage

Obs. Room - Sill Dust 

(Plastic)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 30 709 58 20 23 27 100 19074 7%

2-no 30 215 64 19 23 26 123 1367 23%

1-yes 30 76 37 5 21 23 28 453 10%

2-no 30 207 57 19 23 26 93 1597 20%

1-yes 30 55 34 5 21 24 28 267 3%

2-no 30 199 56 19 23 26 100 1449 20%

Post-Work

Post-Clean

PostVerification
D-27 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

Rule Base Rule Base Rule Base

Figure D2.7a. Box Plots of Sill Dust Lead Loading in the Work Room by Stage and 

Cleaning Type 

Table D2.7a. Descriptive Summary of Sill Dust Lead Loading in the Work Room by Stage 

and Cleaning Type 

Stage

W ork Room - Sill 

Dust (Cleaning)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-rule 30 14585 959 20 118 462 10937 124783 63%

2-base 30 17007 1051 31 160 946 6613 284914 67%

1-rule 30 795 64 5 21 26 138 18133 17%

2-base 30 681 212 21 94 223 467 8839 47%

1-rule 29 340 57 5 21 23 138 3378 17%

2-base 30 294 84 20 25 66 133 2625 20%

PostVerification

Post-Work

Post-Clean
D-28 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

Rule Base Rule Base Rule Base

Figure D2.7b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and Cleaning 

Type 

Table D2.7b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and Cleaning Type 

Stage

Tool Room - Sill Dust 

(Cleaning)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-rule 30 278 74 20 23 26 166 2182 20%

2-base 30 796 117 5 25 127 226 14426 23%

1-rule 30 292 81 5 23 70 152 2714 20%

2-base 30 740 103 16 23 65 263 15001 27%

1-rule 30 225 54 5 21 23 109 2449 17%

2-base 30 766 125 16 23 83 312 11894 30%

Post-Work

Post-Clean

PostVerification
D-29 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

Rule Base Rule Base Rule Base

Figure D2.7c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

Cleaning Type 

Table D2.7c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room by 

Stage and Cleaning Type 

Stage

Obs. Room - Sill Dust 

(Cleaning)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-rule 30 158 61 20 21 26 153 971 17%

2-base 30 766 61 19 23 27 89 19074 13%

1-rule 30 140 47 5 21 23 142 1350 17%

2-base 30 143 44 19 23 26 59 1597 13%

1-rule 30 136 48 5 21 26 104 1173 13%

2-base 30 119 39 19 23 26 29 1449 10%

Post-Work

Post-Clean

PostVerification
D-30 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

I II III IV I II III IV I II III IV

Figure D2.8a. Box Plots of Sill Dust Lead Loading in the Work Room by Stage and Phase 

Table D2.8a. Descriptive Summary of Sill Dust Lead Loading in the Work Room by Stage 

and Phase 

Stage

W ork Room - Sill 

Dust (Phase)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I-Rule w / Plastic 15 17404 1281 20 168 597 12624 124783 73%

II-Base w / Plastic 15 4519 587 31 57 370 1622 33257 67%

III-Rule w /o Plastic 15 11766 719 26 106 436 3808 120227 53%

IV-Base w /o Plastic 15 29495 1883 51 160 1592 27255 284914 67%

I-Rule w / Plastic 15 152 53 5 21 23 138 1005 13%

II-Base w / Plastic 15 762 154 25 49 127 285 8839 40%

III-Rule w /o Plastic 15 1439 78 21 23 26 170 18133 20%

IV-Base w /o Plastic 15 601 293 21 130 278 1352 1799 53%

I-Rule w / Plastic 15 199 43 5 21 23 58 1708 13%

II-Base w / Plastic 15 120 60 23 25 50 116 927 7%

III-Rule w /o Plastic 14 490 76 20 23 26 166 3378 21%

IV-Base w /o Plastic 15 467 118 20 23 74 873 2625 33%

PostVerification

Post-Clean

Post-Work
D-31 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

I II III IV I II III IV I II III IV

Figure D2.8b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and Phase 

Table D2.8b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and Phase 

Stage

Tool Room - Sill Dust 

(Phase)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I-Rule w / Plastic 15 159 57 20 21 25 103 1072 13%

II-Base w / Plastic 15 310 108 21 23 126 331 2583 27%

III-Rule w /o Plastic 15 396 97 21 23 26 668 2182 27%

IV-Base w /o Plastic 15 1283 127 5 25 154 226 14426 20%

I-Rule w / Plastic 15 206 55 5 21 43 88 1345 13%

II-Base w / Plastic 15 222 81 21 23 58 383 1118 27%

III-Rule w /o Plastic 15 378 119 21 26 83 504 2714 27%

IV-Base w /o Plastic 15 1259 131 16 26 96 263 15001 27%

I-Rule w / Plastic 15 142 41 5 21 23 71 1112 13%

II-Base w / Plastic 15 396 104 21 23 56 359 2859 33%

III-Rule w /o Plastic 15 307 71 21 21 26 203 2449 20%

IV-Base w /o Plastic 15 1136 150 16 26 117 312 11894 27%

Post-Work

Post-Clean

PostVerification
D-32 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

I II III IV I II III IV I II III IV

Figure D2.8c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

Phase 

Table D2.8c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room by 

Stage and Phase 

Stage

Obs. Room - Sill Dust 

(Phase)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

I-Rule w / Plastic 15 93 53 20 21 26 153 453 7%

II-Base w / Plastic 15 1325 64 20 23 28 89 19074 7%

III-Rule w /o Plastic 15 223 70 21 23 26 540 971 27%

IV-Base w /o Plastic 15 207 58 19 23 26 123 1367 20%

I-Rule w / Plastic 15 70 35 5 20 23 104 346 7%

II-Base w / Plastic 15 83 38 20 23 25 28 453 13%

III-Rule w /o Plastic 15 211 63 19 21 26 345 1350 27%

IV-Base w /o Plastic 15 203 52 19 23 26 61 1597 13%

I-Rule w / Plastic 15 59 35 5 20 23 104 192 0%

II-Base w / Plastic 15 52 32 20 23 25 26 267 7%

III-Rule w /o Plastic 15 212 65 21 23 26 354 1173 27%

IV-Base w /o Plastic 15 186 49 19 23 26 51 1449 13%

Post-Work

Post-Clean

PostVerification
D-33 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

Yes No Yes No Yes No

Figure D2.9a. Box Plots of Sill Dust Lead Loading in the Work Room by Stage and 

Restricted Job 

Table D2. 9a. Descriptive Summary of Sill Dust Lead Loading in the Work Room by Stage 

and Restricted Job 

Stage

W ork Room - Sill 

Dust (Restricted Job)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 28 29828 2913 54 349 2173 30256 284914 79%

2-no 32 3518 396 20 73 312 1296 57334 53%

1-yes 28 1367 181 5 25 161 763 18133 43%

2-no 32 189 80 20 23 50 232 1414 22%

1-yes 28 533 95 5 23 54 486 3378 25%

2-no 31 120 52 20 21 26 133 893 13%

PostVerification

Post-Work

Post-Clean
D-34 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

Yes No Yes No Yes No

Figure D2.9b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and 

Restricted Job 

Table D2. 9b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and Restricted Job 

Stage

Tool Room - Sill Dust 

(Restricted Job)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 28 967 151 21 24 127 664 14426 36%

2-no 32 161 61 5 21 64 157 2182 9%

1-yes 28 972 149 5 26 112 812 15001 36%

2-no 32 118 59 16 22 55 115 798 13%

1-yes 28 805 117 5 23 69 726 11894 32%

2-no 32 224 60 16 21 26 146 2859 16%

PostVerification

Post-Work

Post-Clean
D-35 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

Yes No Yes No Yes No

Figure D2.9c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

Restricted Job 

Table D2. 9c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room by 

Stage and Restricted Job 

Stage

Obs. Room - Sill Dust 

(Restricted Job)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

1-yes 28 898 101 21 25 68 308 19074 25%

2-no 32 80 39 19 21 26 59 673 6%

1-yes 28 235 67 5 23 26 244 1597 25%

2-no 32 60 33 19 20 23 27 453 6%

1-yes 28 216 63 5 23 26 183 1449 18%

2-no 32 50 31 19 21 24 27 354 6%

Post-Work

Post-Clean

PostVerification
D-36 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

T VT W T VT W T VT W

Figure D2.10a. Box Plots of Sill Dust Lead Loading in the Work Room by Stage and Work 

Room Floor Type 

Table D2. 10a. Descriptive Summary of Sill Dust Lead Loading in the Work Room by 

Stage and Work Room Floor Type 

Stage

W ork Room - Sill 

Dust (Floor Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Tile 17 878 295 31 106 362 597 6424 59%

Vinyl Tile 21 28225 1150 20 110 383 17477 284914 52%

Wood 22 15460 2273 54 353 1642 13101 120227 82%

Tile 17 94 62 21 23 50 138 285 6%

Vinyl Tile 21 306 119 20 26 130 397 1799 38%

Wood 22 1649 188 5 25 163 1005 18133 45%

Tile 16 43 34 21 22 23 50 133 0%

Vinyl Tile 21 267 66 20 23 50 115 2625 14%

Wood 22 562 121 5 23 104 873 3378 36%

Post-Work

Post-Clean

PostVerification
D-37 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

T VT W T VT W T VT W

Figure D2.10b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and Work 

Room Floor Type 

Table D2. 10b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and Work Room Floor Type 

Stage

Tool Room - Sill Dust 

(Floor Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Tile 17 91 43 19 21 23 83 668 6%

Vinyl Tile 21 866 134 20 59 131 226 14426 24%

Wood 22 567 121 5 25 75 661 3290 32%

Tile 17 75 39 21 21 23 57 547 6%

Vinyl Tile 21 927 143 16 69 96 263 15001 29%

Wood 22 465 115 5 26 66 504 2714 32%

Tile 17 52 35 21 21 23 44 201 0%

Vinyl Tile 21 788 112 16 26 80 286 11894 29%

Wood 22 559 117 5 23 59 849 2859 36%

PostVerification

Post-Work

Post-Clean
D-38 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

T VT W T VT W T VT W

Figure D2.10c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

Work Room Floor Type 

Table D2. 10c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room 

by Stage and Work Room Floor Type 

Stage

Obs. Room - Sill Dust 

(Floor Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Tile 17 72 34 19 21 23 28 691 6%

Vinyl Tile 21 133 50 20 25 26 96 1367 10%

Wood 22 1078 114 20 25 91 540 19074 27%

Tile 17 65 30 19 21 23 26 672 6%

Vinyl Tile 21 140 47 20 21 26 59 1597 10%

Wood 22 202 61 5 23 26 346 1350 27%

Tile 17 47 28 19 21 23 26 405 6%

Vinyl Tile 21 126 44 20 21 26 51 1449 10%

Wood 22 191 60 5 23 26 173 1173 18%

Post-Work

Post-Clean

PostVerification
D-39 

Post Work Post Cleaning Post Verification 

Work Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

1000000

PFG PFG PFG

Figure D2.11a. Box Plots of Sill Dust Lead Loading in the Work Room by Stage and Work 

Room Floor Condition 

Table D2. 11a. Descriptive Summary of Sill Dust Lead Loading in the Work Room by 

Stage and Work Room Floor Condition 

Stage

W ork Room - Sill 

Dust (Floor Condition)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Poor 27 30346 2759 54 345 1592 33257 284914 78%

Fair 11 2591 393 31 50 160 3808 13101 45%

Good 22 4542 465 20 155 366 835 57334 59%

Poor 27 1489 228 5 25 278 1352 18133 56%

Fair 11 144 81 23 33 86 130 785 9%

Good 22 115 62 20 21 38 170 467 14%

Poor 27 595 124 5 23 81 873 3378 33%

Fair 11 153 71 21 31 50 138 893 18%

Good 21 43 32 20 21 23 26 166 0%

Post-Work

Post-Clean

PostVerification
D-40 

Post Work Post Cleaning Post Verification 

Tool Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

PFG PFG PFG

Figure D2.11b. Box Plots of Sill Dust Lead Loading in the Tool Room by Stage and Work 

Room Floor condition 

Table D2. 11b. Descriptive Summary of Sill Dust Lead Loading in the Tool Room by Stage 

and Work Room Floor condition 

Stage

Tool Room - Sill Dust 

(Floor Condition)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Poor 27 1063 161 5 23 164 993 14426 41%

Fair 11 151 63 21 21 26 216 668 18%

Good 22 84 58 19 23 63 154 226 0%

Poor 27 1014 166 5 43 96 1076 15001 41%

Fair 11 171 59 21 21 26 295 798 27%

Good 22 78 55 16 23 55 133 240 0%

Poor 27 965 167 5 23 117 933 11894 44%

Fair 11 206 52 21 21 26 109 1594 18%

Good 22 64 43 16 21 25 89 203 0%

Post-Work

Post-Clean

PostVerification
D-41 

Post Work Post Cleaning Post Verification 

Obs. Room Sill Dust Lead ( g/sq ft)

1

10

100

1000

10000

100000

PFG PFG PFG

Figure D2.11c. Box Plots of Sill Dust Lead Loading in the Observation Room by Stage and 

Work Room Floor condition 

Table D2. 11c. Descriptive Summary of Sill Dust Lead Loading in the Observation Room 

by Stage and Work Room Floor condition 

Stage

Obs. Room - Sill Dust 

(Floor Condition)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum% Exceed the Federal Standard

Poor 27 937 107 20 25 76 540 19074 26%

Fair 11 118 59 20 26 42 99 691 9%

Good 22 51 31 19 21 23 26 453 5%

Poor 27 233 66 5 21 26 346 1597 26%

Fair 11 140 63 20 26 28 227 672 18%

Good 22 30 25 19 21 23 26 185 0%

Poor 27 220 65 5 23 26 192 1449 19%

Fair 11 104 52 20 26 26 168 405 18%

Good 22 25 24 19 21 23 26 56 0%

Post-Work

Post-Clean

PostVerification
D-42 

C3. Exploratory Summaries of Sill Dust Lead Dust Loadings vs. Select 

Continuous Characteristics 

Scatter plots of the dust lead Loadings recorded from Sills are presented in this section to 

illustrate and summarize the distribution of these factors as a function of select characteristics. 

The fitted linear regression line (using untransformed data) is displayed in each plot along with 

its associated r-square value. 

The selected characteristics are as follows: 

11. Paint Lead Concentration 

12. Sill Dust Lead Loading at Clearance 

13. Initial Average Soil Lead Concentration 

14. Final Average Soil Lead Concentration 

15. Disturbed Area 

16. Avg. Floor Dust Lead (with Bulk) in Post-Work Work Room 
D-43 

Work Room Sill Dust (PW)

10

100

1000

10000

100000

1000000

Average Paint Lead Concentration (ppm) (R-Square = 1.03%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

Work Room Sill Dust (PC)

1

10

100

1000

10000

100000

Average Paint Lead Concentration (ppm) (R-Square = 6.73%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

oo

o o

o

o

oo

o

o

o

o

oo

o

oo

o

o

o

oo

o

o

o

oo

oo

o o

o

o

o

oo

o

oo

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

Work Room Sill Dust (PV)

1

10

100

1000

10000

Average Paint Lead Concentration (ppm) (R-Square = 7.83%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

o

o

o o

o

o

oo

oo

o

o

o

o

o

oooo

o

oo

oo

o

o

oo

o

o

oo

o

o

o

o

o

o

o

o

o

oooo

o

o

o

o

o

o

o

o

Figure D3.1a. Scatter Plots of Work Room Sill Dust Lead Loading by Stage and Average 

Paint Lead Concentration 
D-44 

Tool Room Sill Dust (PW)

1

10

100

1000

10000

100000

Average Paint Lead Concentration (ppm) (R-Square = 1.76%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

oo oo

o

oo

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

ooo

o

o

o

o

oo

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

Tool Room Sill Dust (PC)

1

10

100

1000

10000

100000

Average Paint Lead Concentration (ppm) (R-Square = 1.17%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

oo

o

o

o

ooo

o

o

o

o

o

o

o

oo

o

o

o

o

o

oo

o

oooo

o

ooo

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Tool Room Sill Dust (PV)

1

10

100

1000

10000

100000

Average Paint Lead Concentration (ppm) (R-Square = 2.73%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

oooo

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

Figure D3.1b. Scatter Plots of Tool Room Sill Dust Lead Loading by Stage and Average 

Paint Lead Concentration 
D-45 

Obs. Room Sill Dust (PW)

10

100

1000

10000

100000

Average Paint Lead Concentration (ppm) (R-Square = 0.67%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

oo

o

o

o

o

o

o

o

o

o

oo

o

o

o

oo

o

oo

o

o

o

o

o

ooo

oo

o

o

o

o

o

oo

o

o

o

o

o

o

oo

o

o

o

o

o

o

o o

Obs. Room Sill Dust (PC)

1

10

100

1000

10000

Average Paint Lead Concentration (ppm) (R-Square = 8.31%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

oo

o

o

o o

o

o

ooo

ooo

o

o

oo

o

o

o

o

ooooo

o

o

o

o

o

o

oo

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o

Tool Room Sill Dust (PV)

1

10

100

1000

10000

100000

Average Paint Lead Concentration (ppm) (R-Square = 2.73%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

oooo

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

Figure D3.1c. Scatter Plots of Observation Room Sill Dust Lead Loading by Stage and 

Average Paint Lead Concentration 
D-46 

Work Room Sill Dust (PW)

10

100

1000

10000

100000

1000000

Average Sill Dust Lead Loading at Clearance (R-Square = 1.58%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

Work Room Sill Dust (PC)

1

10

100

1000

10000

100000

Average Sill Dust Lead Loading at Clearance (R-Square = 0.05%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o o

Work Room Sill Dust (PV)

1

10

100

1000

10000

Average Sill Dust Lead Loading at Clearance (R-Square = 0.99%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

o

o

oo

o

o

o

o

o

o

oo

o

o

o

o

oo

o

o

o o

o

oo

o

o

o

Figure D3.2a. Scatter Plots of Work Room Sill Dust Lead Loading by Stage and Sill Dust 

Lead Loading at Clearance 
D-47 

Tool Room Sill Dust (PW)

1

10

100

1000

10000

100000

Average Sill Dust Lead Loading at Clearance (R-Square = 0.33%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

oo

o

o

oo

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

o

o

Tool Room Sill Dust (PC)

1

10

100

1000

10000

100000

Average Sill Dust Lead Loading at Clearance (R-Square = 0.31%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

ooo

o

o

o

o

o

o

o

o o

o

o

Tool Room Sill Dust (PV)

1

10

100

1000

10000

100000

Average Sill Dust Lead Loading at Clearance (R-Square = 0.47%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

o

ooo

o

o

o

o

o

o

o

o

oooo

o

o

o

o

o

o

o

o

o

o

o

Figure D3.2b. Scatter Plots of Tool Room Sill Dust Lead Loading by Stage and Sill Dust 

Lead Loading at Clearance 
D-48 

Obs. Room Sill Dust (PW)

10

100

1000

10000

100000

Average Sill Dust Lead Loading at Clearance (R-Square = 0.13%)

0.01 0.10 1.00 10.00 100.00 1000.00

o

o

oo

o

o

o

o

o

o

o

o

o

o

oo

ooo

o

o

o

o

o

o

o o

o

Obs. Room Sill Dust (PC)

1

10

100

1000

10000

Average Sill Dust Lead Loading at Clearance (R-Square = 0.03%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

o

oo

o

o o

o

o

o

o

oooo

o

o

o

o

o

oo o

o

o

Obs. Room Sill Dust (PV)

1

10

100

1000

10000

Average Sill Dust Lead Loading at Clearance (R-Square = 0%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

o

ooo o

o

o

o

o

ooooo

o

o

o

o

o

o o

o

o

Figure D3.2c. Scatter Plots of Observation Room Sill Dust Lead Loading by Stage and Sill 

Dust Lead Loading at Clearance 
D-49 

Work Room Sill Dust (PW)

10

100

1000

10000

100000

1000000

Average Initial Soil Lead Loading (R-Square = 0.12%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Work Room Sill Dust (PC)

1

10

100

1000

10000

100000

Average Initial Soil Lead Loading (R-Square = 0.52%)

0 1000 2000 3000 4000 5000 6000

o

o

oo

o

o

o

o

o

oo

o

oo

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Work Room Sill Dust (PV)

1

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 0.98%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

oo

o

o

ooo

o

o

o

oo

o

o

o o

o

o

o

o

o

o

o

o

o o

Figure D3.3a. Scatter Plots of Work Room Sill Dust Lead Loading by Stage and Initial 

Average Soil Lead Concentration 
D-50 

Tool Room Sill Dust (PW)

1

10

100

1000

10000

100000

Average Initial Soil Lead Loading (R-Square = 0.97%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

oo

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

o

o o

o

Tool Room Sill Dust (PC)

1

10

100

1000

10000

100000

Average Initial Soil Lead Loading (R-Square = 0.77%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

o

o

o

o

oo

o

oo

o

oo

o

o

o

o

o

o

o

o o

o

o

o

o

o

o o

o

o

o

o o

o

o

o

o

o

Tool Room Sill Dust (PV)

1

10

100

1000

10000

100000

Average Initial Soil Lead Loading (R-Square = 0.01%)

0 1000 2000 3000 4000 5000 6000

o

o

oo

o

o

o

o

o

o

o

ooo

o

o

o

o

oo

o

o

o

o

o o

o

oo

o

o

o o

o

o

o o

o

o

o o

o

o

Figure D3.3b. Scatter Plots of Tool Room Sill Dust Lead Loading by Stage and Initial 

Average Soil Lead Concentration 
D-51 

Obs. Room Sill Dust (PW)

10

100

1000

10000

100000

Average Initial Soil Lead Loading (R-Square = 0.06%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

oo

o

o

o

o

o

o

o

o

oo

o

ooo

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

o o

o o

o

Obs. Room Sill Dust (PC)

1

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 0.1%)

0 1000 2000 3000 4000 5000 6000

o

o

ooo

o

o

oo

o

o

o

o

ooooo

o

ooo

o

o

o

oo

o

o

o o

o

o

o o o

o o

o o

o

Obs. Room Sill Dust (PV)

1

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 0%)

0 1000 2000 3000 4000 5000 6000

o

o

ooo

o

o

oo

o

oooooo

o

o

o

o

o

o

o

oo

o

o

o o

o

o

o o o

o o

o o

o

Figure D3.3c. Scatter Plots of Observation Room Sill Dust Lead Loading by Stage and 

Initial Average Soil Lead Concentration 
D-52 

Work Room Sill Dust (PW)

10

100

1000

10000

100000

1000000

Average Final Soil Lead Loading (R-Square = 0.09%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

oo

o

o

o

oo

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

Work Room Sill Dust (PC)

1

10

100

1000

10000

100000

Average Final Soil Lead Loading (R-Square = 0.04%)

0 1000 2000 3000 4000 5000 6000 7000

o

oo

o

o

o

ooo

o

o

o

o

o

oo

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o o

o o

o

Work Room Sill Dust (PV)

1

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 0.82%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o oo o

o

Figure D3.4a. Scatter Plots of Work Room Sill Dust Lead Loading by Stage and Final 

Average Soil Lead Concentration 
D-53 

Tool Room Sill Dust (PW)

1

10

100

1000

10000

100000

Average Final Soil Lead Loading (R-Square = 1.23%)

0 1000 2000 3000 4000 5000

o

o

o

o

o

oooo

o

o

o

o

o

o

o

o

oo

oo

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o o

o

Tool Room Sill Dust (PC)

1

10

100

1000

10000

100000

Average Final Soil Lead Loading (R-Square = 1.18%)

0 1000 2000 3000 4000 5000

o

o

o

o

o

o

oooo

o

o

o

o

o

o

o

oo

o

o

o

oo

o

o

oo

o

o

o

o

o

oo

o

o

o

o

o

Tool Room Sill Dust (PV)

1

10

100

1000

10000

100000

Average Final Soil Lead Loading (R-Square = 0.25%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

oo

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o

o

o

oo

o

oo

o

o

o

o

o

o

o

o o

o

o

o

Figure D3.4b. Scatter Plots of Tool Room Sill Dust Lead Loading by Stage and Final 

Average Soil Lead Concentration 
D-54 

Obs. Room Sill Dust (PW)

10

100

1000

10000

100000

Average Final Soil Lead Loading (R-Square = 0.22%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

oo

o

ooo

o

o

o

oo

o

o

o

ooo

o

o

o

o

oo

o

o

o

o

oo

o

o

oo

o

o

o o o

o

o o

Obs. Room Sill Dust (PC)

1

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 0.07%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

oo

o

oo

o

oo

o

oo

o

oooo

o

oooo

o

o

o

o

o

o

o

o

ooo

o

o o o

o

o o

Obs. Room Sill Dust (PV)

1

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 0.04%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

oo

o

oooo

o

o

o

o

oooo

o

oooo

o

ooo

o

o

o

o

ooo

o

o o o

o

o o

Figure D3.4c. Scatter Plots of Observation Room Sill Dust Lead Loading by Stage and 

Final Average Soil Lead Concentration 
D-55 

Work Room Sill Dust (PW)

10

100

1000

10000

100000

1000000

Disturbed Area (Sq. Feet) (R-Square = 0.03%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

Work Room Sill Dust (PC)

1

10

100

1000

10000

100000

Disturbed Area (Sq. Feet) (R-Square = 2.86%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

o

o

o

o

oo

o

o

oo

oo

o

oo

o

o

o

o

oo

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

Work Room Sill Dust (PV)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 0.19%)

0 10 20 30 40 50 60 70 80 90 100 110

o

oo

o

o

o

o

o

oo

o

o

ooo

o o

o

oo

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

o

o

o

o

o

o

o

o

oo

o

oo

o

o o

Figure D3.5a. Scatter Plots of Work Room Sill Dust Lead Loading by Stage and Disturbed 

Area (ft2) 
D-56 

Tool Room Sill Dust (PW)

1

10

100

1000

10000

100000

Disturbed Area (Sq. Feet) (R-Square = 0.01%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

o

o

oo

o

o

o

o

o

oo

o

oo

o o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o o

o

o

o

o

o

o

o

oo

o

o

oo

o

o

o

o

o o o

Tool Room Sill Dust (PC)

1

10

100

1000

10000

100000

Disturbed Area (Sq. Feet) (R-Square = 0.08%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

o

oo

o

o

o

o

ooo

o

o

o

o

oo

o

oo

o

o

o

o

o

o

o

o

o

o o

o

o

o

o

o

oo

o

o

o

o

oo

oo

o

o

oo

o

o

o

o

Tool Room Sill Dust (PV)

1

10

100

1000

10000

100000

Disturbed Area (Sq. Feet) (R-Square = 0.04%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

o

oo

o

o

oo

oooo

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o o

o

o

o

oo

o

o

o

o

o

o

o

oo

oo

o

o

o

o

o

Figure D3.5b. Scatter Plots of Tool Room Sill Dust Lead Loading by Stage and Disturbed 

Area (ft2) 
D-57 

Obs. Room Sill Dust (PW)

10

100

1000

10000

100000

Disturbed Area (Sq. Feet) (R-Square = 1.05%)

0 10 20 30 40 50 60 70 80 90 100 110

ooo

ooo

oo

o

o

o

o

ooo

o

o

o

o

o o

o

o o

o

o

o

o

o

oo

o o

o o

o

o o

o

o

o

o

o

oo

o

oo

o

oo

o

o o

Obs. Room Sill Dust (PC)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 1.04%)

0 10 20 30 40 50 60 70 80 90 100 110

oooooo

o

o

oooo

o

o

o

o

o

oo

o

o

o

o

o

o

o

oo oo o

o

o oo

o

o

o

o

ooooo

o

o

o

o o

Obs. Room Sill Dust (PV)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 0.97%)

0 10 20 30 40 50 60 70 80 90 100 110

ooo

ooo

o

oo

oooo

o

o

o

o

o o

o

o

o

o

o

o

o

o

ooo oo o

o

o

o oo

o

oo

o

ooooo

o

oo

o

o

o o

Figure D3.5c. Scatter Plots of Observation Room Sill Dust Lead Loading by Stage and 

Disturbed Area (ft2) 
D-58 

Work Room Sill Dust (PW)

10

100

1000

10000

100000

1000000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 10.4%)

10 100 1000 10000 100000 1000000 10000000

o o

o

o o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o o

o

o

ooo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Work Room Sill Dust (PC)

1

10

100

1000

10000

100000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 16.36%)

10 100 1000 10000 100000 1000000 10000000

o

oo

o o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o o

o

ooo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Work Room Sill Dust (PV)

1

10

100

1000

10000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 17.93%)

10 100 1000 10000 100000 1000000 10000000

o

o

o

o

o

o

ooo o o

o

o

o

o

o

oo

o

oo

o o

o

ooo

o

oo

o

o

o

o

o

oo

o

o

o

o

ooo

o

o

o

o

o

o

o

oo

o

o

o

o

o

Figure D3.6a. Scatter Plots of Work Room Sill Dust Lead Loading by Stage and Avg. Floor 

Dust Lead (with Bulk) in Post-Work Work Room 
D-59 

Tool Room Sill Dust (PW)

1

10

100

1000

10000

100000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 8.52%)

10 100 1000 10000 100000 1000000 10000000

o o

o

o ooo

o

o

o

o

o

o

o

o

o

ooo

o

o o

o

o

oo

o

oo

o

o

o

o

o

o

o

o

oo

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Tool Room Sill Dust (PC)

1

10

100

1000

10000

100000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 10.75%)

10 100 1000 10000 100000 1000000 10000000

o

o

o

o o

oo

o

o

o

oo

o

o

o

o

o

oo

o

o

o o

o

o

o

oo

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

Tool Room Sill Dust (PV)

1

10

100

1000

10000

100000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 11.58%)

10 100 1000 10000 100000 1000000 10000000

o

o

o

o o

o

oo

o

o

ooo

o

o

oo

o

o

o

o o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

ooooo

oo

o

o

oo

o

o

o

o

o

Figure D3.6b. Scatter Plots of Tool Room Sill Dust Lead Loading by Stage and Avg. Floor 

Dust Lead (with Bulk) in Post-Work Work Room 
D-60 

Obs. Room Sill Dust (PW)

10

100

1000

10000

100000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 1.91%)

10 100 1000 10000 100000 1000000 10000000

o oo o oooo

o

o

o

o

o

oo o

oo

o

o

o

o oo

o

oo

o

oo

o

o

oo

o

o

o ooo

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

Obs. Room Sill Dust (PC)

1

10

100

1000

10000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 15.09%)

10 100 1000 10000 100000 1000000 10000000

o o

o

o ooooo

o

o

o

o

oo oo

o

ooo o oo

o

oo

o

oo

o

o

o

o

o

o oo

o

o

o

ooooo

o

o

o

o

oo

o

o

o

o

o

Obs. Room Sill Dust (PV)

1

10

100

1000

10000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 16.56%)

10 100 1000 10000 100000 1000000 10000000

o o

o

o oooo

o

o

oo

o

oo oooooo o oo

o

oo

o

oo

o

o

o

o

o

o oo

o

o

o

o

o

ooo

oo

o

o

oo

o

o

o

o

o

Figure D3.6c. Scatter Plots of Observation Room Sill Dust Lead Loading by Stage and Avg. 

Floor Dust Lead (with Bulk) in Post-Work Work Room 
APPENDIX E 

DETAILED DESCRIPTIVE ANALYSES OF EXTERIOR DUST 

LEAD LOADINGS (WITHOUT BULK DEBRIS SAMPLES) 
E-1 

E. Normality Check for Exterior Lead Dust Loadings 

Prior to any analysis of the lead dust loadings, the underlying distribution of the response data 

was examined for normality. Note that a Wilkes-Shapiro p-value < 0.01 indicates a significant 

departure from normality. With larger sample sizes, normality tests can indicate statistically 

significant but unimportant departures from normality. For the data collected for this study, the 

log-transformation of the data was accepted even when the Wilkes-Shapiro statistics indicated 

non-normality. With additional time, potential outliers and other influential points could be 

explored to determine if other data adjustments would be beneficial to the analyses. 

30000 90000 150000 210000 270000 330000

0

10

20

30

40

50

60

70

Percent

Lead Dust Concentration (micrograms/sq ft)

Figure E.1a. Histogram of Dust Lead Measurements (μg/ft2) from Top of Rule Plastic 

(Wilkes-Shapiro p-value < 0.001) 

6.6 7.8 9 10.2 11.4 12.6

0

5

10

15

20

25

30

35

Percent

Log-Transformed Lead Dust Concentration (micrograms/sq ft)

Figure E.1b. Histogram of Log Transformed Dust Lead Measurements (μg/ft2) from Top 

of Rule Plastic (Wilkes-Shapiro p-value = 0.109) 
E-2 

0 80000 160000 240000 320000 400000

0

20

40

60

80

100

Percent

Lead Dust Concentration (micrograms/sq ft)

Figure E.2a. Histogram of Dust Lead Measurements (μg/ft2) from Under Rule Plastic 

(Wilkes-Shapiro p-value < 0.001) 

3 5 7 9 11 13

0

5

10

15

20

25

30

35

Percent

Log-Transformed Lead Dust Concentration (micrograms/sq ft)

Figure E.2b. Histogram of Log Transformed Dust Lead Measurements (μg/ft2) from 

Under Rule Plastic (Wilkes-Shapiro p-value = 0.003) 
E-3 

0 40000 80000 120000 160000 200000

0

10

20

30

40

50

60

70

Percent

Lead Dust Concentration (micrograms/sq ft)

Figure E.3a. Histogram of Dust Lead Measurements (μg/ft2) from Near Rule Plastic 

(Wilkes-Shapiro p-value < 0.001) 

4.8 6 7.2 8.4 9.6 10.8 12

0

5

10

15

20

25

Percent

Log-Transformed Lead Dust Concentration (micrograms/sq ft)

Figure E.3b. Histogram of Log Transformed Dust Lead Measurements (μg/ft2) from Near 

Rule Plastic (Wilkes-Shapiro p-value = 0.011) 
E-4 

E1. Exploratory Summaries of Exterior Lead Dust Loadings vs. Select 

Characteristics 

Box plots of the dust lead loadings recorded from top of, under and near rule plastic as well as 

descriptive statistical summary tables are presented in this section to illustrate and summarize the 

distribution of these factors as a function of select characteristics. Box plots are a technique for 

displaying one-dimensional data and their summary characteristics. A box plot displays the 

median (represented by the center horizontal line), the 25th percentile (represented by the bottom 

of the box), and the 75th percentile (represented by the top of the box). The vertical lines, or 

whiskers, are drawn from the box to the most extreme point within 1.5 * interquartile range. (An 

interquartile range is the distance between the 25th and the 75th percentiles.) Any value more 

extreme than this is identified individually with stars. The data are plotted using a log-base 10 

scale. The summary statistics provided in the tables are sample size, geometric mean, geometric 

standard error, minimum, 10th percentile, 25th percentile, median, 75th percentile, 90th percentile, 

and maximum. 
E-5 

Top of Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

Combined Low Medium High

Figure E.1a. Box Plots of Dust Lead Loading Measured Top of Rule Plastic by Job 

Intensity Level 

Table E.1a. Descriptive Summary of Dust Lead Loading Measured Top of Rule Plastic 

by Job Intensity Level 

Top of Rule 

Plastic - 

Intensity Level

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 15 71331 23134 956 5151 19376 106383 341492

2-Medium 15 37084 15070 417 8556 15754 45710 205451

3-Low 15 56929 27686 472 14441 43976 96758 161018

Combined 45 55114 21292 417 11512 22004 79163 341492
E-6 

Under Rule Plastic Dust Lead Loading ( g/sq ft)

10

100

1000

10000

100000

1000000

Combined Low Medium High

Figure E.1b. Box Plots of Dust Lead Loading Measured Under Rule Plastic by Job 

Intensity Level 

Table E.1b. Descriptive Summary of Dust Lead Loading Measured Under Rule Plastic by 

Job Intensity Level 

Under Rule 

Plastic - 

Intensity Level

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 15 61639 3689 87 469 1204 44098 438699

2-Medium 15 4789 182 15 24 105 967 65815

3-Low 15 2230 164 15 23 129 411 24744

Combined 45 22886 479 15 68 322 1523 438699
E-7 

Near Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

Combined Low Medium High

Figure E.1c. Box Plots of Dust Lead Loading Measured Near Rule Plastic by Job Intensity 

Level 

Table E.1c. Descriptive Summary of Dust Lead Loading Measured Near Rule Plastic by 

Job Intensity Level 

Near Rule 

Plastic - 

Intensity Level

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 15 18311 2937 150 331 1836 18002 85985

2-Medium 15 13802 2501 172 488 1205 16597 117170

3-Low 15 47629 21232 1129 8768 27082 61388 217900

Combined 45 26581 5383 150 929 9865 27650 217900
E-8 

Top of Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

Combined OH PA

Figure E.2a. Box Plots of Dust Lead Loading Measured Top of Rule Plastic by City 

Table E.2a. Descriptive Summary of Dust Lead Loading Measured Top of Rule Plastic 

by City 

Top of Rule 

Plastic - City

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Columbus, OH 30 59219 23094 417 14348 22746 73457 341492

Pittsburgh, PA 15 46905 18099 956 5151 14846 83480 161018

Combined 45 55114 21292 417 11512 22004 79163 341492
E-9 

Under Rule Plastic Dust Lead Loading ( g/sq ft)

10

100

1000

10000

100000

1000000

Combined OH PA

Figure E.2b. Box Plots of Dust Lead Loading Measured Under Rule Plastic by City 

Table E.2b. Descriptive Summary of Dust Lead Loading Measured Under Rule Plastic by 

City 

Under Rule 

Plastic - City

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Columbus, OH 30 11821 450 15 87 295 1523 216592

Pittsburgh, PA 15 45017 544 15 23 360 11220 438699

Combined 45 22886 479 15 68 322 1523 438699
E-10 

Near Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

Combined OH PA

Figure E.2c. Box Plots of Dust Lead Loading Measured Near Rule Plastic by City 

Table E.2c. Descriptive Summary of Dust Lead Loading Measured Near Rule Plastic by 

City 

Near Rule 

Plastic - City

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Columbus, OH 30 21741 5660 172 929 11017 27082 117170

Pittsburgh, PA 15 36259 4867 150 658 3793 31708 217900

Combined 45 26581 5383 150 929 9865 27650 217900
E-11 

 Combined |----------- Low ---------| |--- Medium --| |---------- High ----------| 

Top of Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

12345678

Figure E.3a. Box Plots of Dust Lead Loading Measured Top of Rule Plastic by Job Type 

Table E.3a. Descriptive Summary of Dust Lead Loading Measured Top of Rule Plastic 

by Job Type 

Top of Rule 

Plastic - Job 

Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

E1-Door 

Replacement 6 54110 32653 5286 14441 37018 79163 151734

E2-Trim Soffit 

Replacement 6 77103 44474 4109 14846 83718 115207 161018

E3-Rotopene 3 22218 7713 472 472 22004 44178 44178

E4-Heat gun 

under 1100 

degrees 3 52302 37431 19466 19466 23684 113756 113756

E5-Dry Scrape 12 33280 12004 417 5457 14758 35148 205451

E6-Power 

Sanding 6 151573 111388 23488 73457 118061 234877 341492

E7-Torching 6 17714 5447 956 1495 4422 11512 83480

E8-Heat gun 

over 1100 

degrees 3 18079 18000 15750 15750 19111 19376 19376

Combined 45 55114 21292 417 11512 22004 79163 341492
E-12 

 Combined |----------- Low ---------| |--- Medium --| |---------- High ----------| 

Under Rule Plastic Dust Lead Loading ( g/sq ft)

10

100

1000

10000

100000

1000000

12345678

Figure E.3b. Box Plots of Dust Lead Loading Measured Under Rule Plastic by Job Type 

Table E.3b. Descriptive Summary of Dust Lead Loading Measured Under Rule Plastic by 

Job Type 

Under Rule 

Plastic - Job 

Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

E1-Door 

Replacement 6 77 32 15 19 21 26 360

E2-Trim Soffit 

Replacement 6 5351 648 74 115 270 6635 24744

E3-Rotopene 3 294 270 162 162 268 451 451

E4-Heat gun 

under 1100 

degrees 3 22659 3149 248 248 1914 65815 65815

E5-Dry Scrape 12 322 89 15 23 67 186 2156

E6-Power 

Sanding 6 45447 4896 322 554 5558 44098 216592

E7-Torching 6 108308 8565 469 719 6212 197538 438699

E8-Heat gun 

over 1100 

degrees 3 684 388 87 87 442 1523 1523

Combined 45 22886 479 15 68 322 1523 438699
E-13 

 Combined |----------- Low ---------| |--- Medium --| |---------- High ----------| 

Near Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

12345678

Figure E.3c. Box Plots of Dust Lead Loading Measured Near Rule Plastic by Job Type 

Table E.3c. Descriptive Summary of Dust Lead Loading Measured Near Rule Plastic by 

Job Type 

Near Rule 

Plastic - Job 

Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

E1-Door 

Replacement 6 28156 13527 1129 3793 24008 31708 84290

E2-Trim Soffit 

Replacement 6 85698 60939 19278 27082 58120 133690 217900

E3-Rotopene 3 10435 6350 1380 1380 8768 21158 21158

E4-Heat gun 

under 1100 

degrees 3 53901 37960 16884 16884 27650 117170 117170

E5-Dry Scrape 12 3777 1267 172 381 941 5887 16597

E6-Power 

Sanding 6 42532 31602 9865 16905 38360 65719 85985

E7-Torching 6 681 425 150 151 428 1093 1836

E8-Heat gun 

over 1100 

degrees 3 5128 1208 331 331 363 14689 14689

Combined 45 26581 5383 150 929 9865 27650 217900
E-14 

Top of Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

Combined C1 C2 C3 C4

Figure E.4a. Box Plots of Dust Lead Loading Measured Top of Rule Plastic by Contractor 

Table E.4a. Descriptive Summary of Dust Lead Loading Measured Top of Rule Plastic 

by Contractor 

Top of Rule 

Plastic - 

Contractor

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C1 9 130473 82162 8556 50819 106383 205451 341492

C2 12 38983 20229 472 17431 20735 57428 115207

C3 9 14948 7745 417 2357 14348 15754 45710

C4 15 46905 18099 956 5151 14846 83480 161018

Combined 45 55114 21292 417 11512 22004 79163 341492
E-15 

Under Rule Plastic Dust Lead Loading ( g/sq ft)

10

100

1000

10000

100000

1000000

Combined C1 C2 C3 C4

Figure E.4b. Box Plots of Dust Lead Loading Measured Under Rule Plastic by Contractor 

Table E.4b. Descriptive Summary of Dust Lead Loading Measured Under Rule Plastic by 

Contractor 

Under Rule 

Plastic - 

Contractor

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C1 9 30419 1402 15 322 782 10334 216592

C2 12 6506 688 87 205 427 1719 65815

C3 9 309 82 18 24 66 170 2156

C4 15 45017 544 15 23 360 11220 438699

Combined 45 22886 479 15 68 322 1523 438699
E-16 

Near Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

Combined C1 C2 C3 C4

Figure E.4c. Box Plots of Dust Lead Loading Measured Near Rule Plastic by Contractor 

Table E.4c. Descriptive Summary of Dust Lead Loading Measured Near Rule Plastic by 

Contractor 

Near Rule 

Plastic - 

Contractor

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C1 9 29028 11559 929 4178 16905 58718 85985

C2 12 29310 10701 331 5074 19021 41251 117170

C3 9 4363 1186 172 274 574 7596 16597

C4 15 36259 4867 150 658 3793 31708 217900

Combined 45 26581 5383 150 929 9865 27650 217900
E-17 

Top of Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

Combined C1 1 2 9 10 13 16 17 19

Figure E.5a. Box Plots of Dust Lead Loading Measured Top of Rule Plastic by Housing 

Unit 

Table E.5a. Descriptive Summary of Dust Lead Loading Measured Top of Rule Plastic 

by Housing Unit 

Top of Rule 

Plastic - 

Housing Unit

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C01 9 30866 17321 472 19111 19466 23684 113756

H01 9 130473 82162 8556 50819 106383 205451 341492

H02 3 63331 32223 4109 4109 70677 115207 115207

H09 6 9786 4618 417 1845 8351 15168 24585

H10 6 47764 12495 956 1495 13179 96758 161018

H13 3 30774 11666 3692 3692 5151 83480 83480

H16 3 32963 18214 5286 5286 14441 79163 79163

H17 3 75257 58537 30060 30060 43976 151734 151734

H19 3 25271 21780 14348 14348 15754 45710 45710

Combined 45 55114 21292 417 11512 22004 79163 341492
E-18 

Under Rule Plastic Dust Lead Loading ( g/sq ft)

10

100

1000

10000

100000

1000000

Combined C1 1 2 9 10 13 16 17 19

Figure E.5b. Box Plots of Dust Lead Loading Measured Under Rule Plastic by Housing 

Unit 

Table E.5b. Descriptive Summary of Dust Lead Loading Measured Under Rule Plastic by 

Housing Unit 

Under Rule 

Plastic - 

Housing Unit

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C01 9 7879 691 87 248 442 1523 65815

H01 9 30419 1402 15 322 782 10334 216592

H02 3 2387 679 115 115 411 6635 6635

H09 6 417 94 18 24 67 170 2156

H10 6 6226 981 74 129 594 11220 24744

H13 3 212480 47078 1204 1204 197538 438699 438699

H16 3 134 54 19 19 23 360 360

H17 3 20 19 15 15 19 26 26

H19 3 92 62 22 22 53 201 201

Combined 45 22886 479 15 68 322 1523 438699
E-19 

Near Rule Plastic Dust Lead Loading ( g/sq ft)

100

1000

10000

100000

1000000

Combined C1 1 2 9 10 13 16 17 19

Figure E.5c. Box Plots of Dust Lead Loading Measured Near Rule Plastic by Housing 

Unit 

Table E.5c. Descriptive Summary of Dust Lead Loading Measured Near Rule Plastic by 

Housing Unit 

Near Rule 

Plastic - 

Housing Unit

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C01 9 23155 6629 331 1380 14689 21158 117170

H01 9 29028 11559 929 4178 16905 58718 85985

H02 3 47774 45011 27082 27082 54851 61388 61388

H09 6 484 380 172 190 381 574 1205

H10 6 61895 3689 150 151 9738 133690 217900

H13 3 1196 1097 658 658 1093 1836 1836

H16 3 39042 14450 1129 1129 31708 84290 84290

H17 3 17270 12662 3793 3793 17590 30426 30426

H19 3 12121 11533 7596 7596 12169 16597 16597

Combined 45 26581 5383 150 929 9865 27650 217900
APPENDIX F 

DETAILED DESCRIPTIVE ANALYSES OF INTERIOR AIR 

LEAD CONCENTRATIONS 
F-1 

F1. Distribution Check for Interior Air Dust Lead Concentrations 

Distribution of Non-Detectable Air Lead Measurements 

Measurements recorded at or below the detection limit were set to half that limit for this analysis. 

Table F1.1 summarizes the frequency for these measurements. 

Table F1.1. Summary of Interior Air Dust Lead Concentration Measurements (μg/ft2) 

Below Detection Limit Measurements by Room and Stage 

Room 

Stage Work Tool Observation 

Post-Work 29 (48.3%) 43 (71.7%) 45 (75.0%) 

Post-Cleaning 50 (82.0%) 53 (88.3%) 54 (90.0%) 

Post-Verification 59 (98.3%) 59 (98.3%) 58 (96.7%) 

Normality of the Air Lead Measurement Distribution 

Prior to any analysis of the lead dust concentrations, the underlying distribution of the response 

data was examined for normality. Note that a Wilkes-Shapiro p-value < 0.001 indicates a 

significant departure from normality. With larger sample sizes, normality tests can indicate 

statistically significant but unimportant departures from normality. For the data collected for this 

study, the log-transformation of the data was accepted even when the Wilkes-Shapiro statistics 

indicated non-normality. With additional time, potential outliers and other influential points 

could be explored to determine if other data adjustments would be beneficial to the analyses. 
F-2 

Figures F1.1a and F1.1b summarize the distribution of the raw and natural log-transformed air 

dust lead measurements from the work room. 

0 400 800 1200 1600 2000 2400 2800 3200 3600

0

20

40

60

80

100

Percent

Lead (micrograms/cubic meter)

Figure F1.1a. Histogram of Air Dust Lead Loading Concentrations (μg/m3) in the Work 

Room Across All Stages (Wilkes-Shapiro p-value < 0.001) 

0.4 1.2 2 2.8 3.6 4.4 5.2 6 6.8 7.6 8.4

0

10

20

30

40

50

Percent

Log-Transformed Lead (micrograms/cubic meter)

Figure F1.1b. Histogram of Log Transformed Air Dust Lead Concentration Measurements 

(μg/m3) in the Work Room Across All Stages (Wilkes-Shapiro p-value = < 

0.001)
F-3 

F2. Exploratory Summaries of Interior Air Dust Lead Concentrations vs. Select 

Categorical Characteristics 

Box plots of the dust lead concentrations recorded in the air as well as descriptive statistical 

summary tables are presented in this section to illustrate and summarize the distribution of these 

factors as a function of select characteristics. Only work room results are presented. Box plots 

are a technique for displaying one-dimensional data and their summary characteristics. A box 

plot displays the median (represented by the center horizontal line), the 25th percentile 

(represented by the bottom of the box), and the 75th percentile (represented by the top of the 

box). The vertical lines, or whiskers, are drawn from the box to the most extreme point within 

1.5 * interquartile range. (An interquartile range is the distance between the 25th and the 75th

percentiles.) Any value more extreme than this is identified individually with stars. The data are 

plotted using a log-base 10 scale. The summary statistics provided in the tables are sample size, 

arithmetic average, geometric average, minimum, 25th percentile, median, 75th percentile, and 

maximum. 

The selected characteristics are as follows: 

28. Job intensity 

29. City 

30. Job type 

31. Contractor 

32. Housing unit 

33. Rule Plastic Use 

34. Cleaning Type 

35. Phase 

36. Restricted vs. non-restricted jobs 

37. Work room floor type 

38. Work room floor condition
F-4 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

LMH LMH LMH

Figure F2.1a. Box Plots of Interior Air Dust Lead Concentration Measured in the Work 

Room by Stage and Job Intensity Level 

Table F2.1a. Descriptive Summary of Interior Air Dust Lead Concentration Measured in 

the Work Room by Stage and Job Intensity Level 

Stage

Work Room - Air 

Lead (Intensity)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 20 21 8 1 4 4 17 118

2-Medium 20 328 22 1 2 9 152 3651

3-Low 20 8 5 1 4 4 9 31

1-High 20 24 6 3 3 4 4 229

2-Medium 20 9 6 3 3 4 9 43

3-Low 20 36 5 3 3 4 4 637

1-High 19 36 30 3 28 35 48 60

2-Medium 20 30 25 7 18 31 42 56

3-Low 20 29 24 4 18 28 43 56

PostVerification

Post-Work

Post-Clean
F-5 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

OH PA OH PA OH PA

Figure F2.2a. Box Plots of Interior Air Dust Lead Concentration in the Work Room by 

Stage and City 

Table F2.2a. Descriptive Summary of Interior Air Dust Lead Concentration in the Work 

Room by Stage and City 

Stage

Work Room - Air 

Lead (City)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Columbus, OH 38 175 10 1 3 4 25 3651

Pittsburgh, PA 22 22 9 2 3 6 23 118

Columbus, OH 38 24 5 3 3 4 5 637

Pittsburgh, PA 22 22 6 3 4 4 4 229

Columbus, OH 38 30 24 3 13 32 47 60

Pittsburgh, PA 21 35 32 13 28 32 43 58

PostVerification

Post-Work

Post-Clean
F-6 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7

Figure F2.3a. Box Plots of Interior Air Dust Lead Concentration in the Work Room by 

Stage and Job Type 

Table F2.3a. Descriptive Summary of Interior Air Dust Lead Concentration in the Work 

Room by Stage and Job Type 

Stage

Work Room - Air 

Lead (Job Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

I1-Cut Outs 12 6 5 3 4 4 8 10

I2-Replace Windows 8 10 6 1 2 4 18 31

I3-Scrape Surface * 8 2 21 2 2 3 3

I4-Scrape Door * 8 802 300 63 105 176 1070 3651

I5-Heat gun < 1100° 4 32 10 1 4 9 61 110

I6-Heat gun > 1100° * 12 33 13 1 5 9 65 118

I7-Kitchen 8 3 33 3 4 4 4

I1-Cut Outs 12 56 5 3 3 4 4 637

I2-Replace Windows 8 5 5 3 4 4 4 14

I3-Scrape Surface * 8 4 43 3 4 4 5

I4-Scrape Door * 8 14 8 3 3 6 24 43

I5-Heat gun < 1100° 4 10 7 3 3 6 17 25

I6-Heat gun > 1100° * 12 38 8 3 3 4 11 229

I7-Kitchen 8 4 44 4 4 4 9

I1-Cut Outs 12 28 23 4 18 22 42 56

I2-Replace Windows 8 31 26 9 19 34 43 48

I3-Scrape Surface * 8 29 25 8 17 28 37 56

I4-Scrape Door * 8 35 28 7 21 38 49 56

I5-Heat gun < 1100° 4 23 22 13 18 22 28 33

I6-Heat gun > 1100° * 12 39 35 13 31 39 48 60

I7-Kitchen 7 32 24 3 17 33 45 57

Post-Clean

Post-Work

PostVerification

* 

Indicates job is restricted
F-7 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

C2 C3 C4 C2 C3 C4 C2 C3 C4

Figure F2.4a. Box Plots of Interior Air Dust Lead Concentration in the Work Room by 

Stage and Contractor 

Table F2.4a. Descriptive Summary of Interior Air Dust Lead Concentration in the Work 

Room by Stage and Contractor 

Stage

Work Room - Air 

Lead (Contractor)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C2 20 11 5 1 2 4 8 110

C3 18 358 23 1 3 5 158 3651

C4 22 22 9 2 3 6 23 118

C2 20 6 4 3 3 3 4 25

C3 18 43 7 3 3 4 9 637

C4 22 22 6 3 4 4 4 229

C2 20 29 25 8 16 24 39 60

C3 18 31 22 3 10 36 48 56

C4 21 35 32 13 28 32 43 58

Post-Work

Post-Clean

PostVerification
F-8 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36 C1 3 8 9 10 16 17 31 32 33 36

Figure F2.5a. Box Plots of Interior Air Dust Lead Concentration in the Work Room by 

Stage and Housing Unit 
F-9 

Table F2.5a. Descriptive Summary of Interior Air Dust Lead Concentration in the Work 

Room by Stage and Housing Unit 

Stage

Work Room - Air 

Lead (Housing Unit)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C01 12 14 5 1 4 4 7 110

H03 4 2 21 2 2 3 3

H08 7 773 66 3 4 147 1444 3651

H09 10 95 10 1 2 6 25 696

H10 4 85 82 60 65 80 104 118

H16 6 14 11 4 7 9 23 31

H17 8 5 4 2 2 3 7 13

H31 1 4 44 4 4 4 4

H32 1 4 44 4 4 4 4

H33 1 4 44 4 4 4 4

H35 5 28 11 3 4 5 63 64

H36 1 3 33 3 3 3 3

C01 12 6 4 3 3 3 4 25

H03 4 4 43 4 4 4 5

H08 7 106 18 3 4 10 43 637

H09 10 5 5 3 3 4 5 17

H10 4 103 28 4 4 89 202 229

H16 6 5 5 3 4 4 4 14

H17 8 4 43 3 4 4 4

H31 1 9 99 9 9 9 9

H32 1 4 44 4 4 4 4

H33 1 4 44 4 4 4 4

H35 5 4 33 3 4 4 4

H36 1 4 44 4 4 4 4

C01 12 30 26 11 16 22 41 60

H03 4 17 16 8 10 17 24 26

H08 7 26 18 4 7 31 43 48

H09 10 36 31 9 31 38 48 56

H10 4 37 32 13 20 38 53 58

H16 6 30 28 17 20 28 43 45

H17 8 37 36 24 32 35 43 56

H31 1 17 17 17 17 17 17 17

H32 1 28 28 28 28 28 28 28

H33 1 57 57 57 57 57 57 57

H35 5 34 24 3 34 38 47 48

H36 0

PostVerification

Post-Work

Post-Clean
F-10 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

Yes No Yes No Yes No

Figure F2.6a. Box Plots of Interior Air Dust Lead Concentration in the Work Room by 

Stage and Rule Plastic Use 

Table F2.6a. Descriptive Summary of Interior Air Dust Lead Concentration in the Work 

Room by Stage and Rule Plastic Use 

Stage

Work Room - Air 

Lead (Plastic)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-yes 30 150 12 1 4 6 31 3651

2-no 30 88 8 1 2 4 10 1444

1-yes 30 6 5 3 3 4 4 38

2-no 30 40 7 3 3 4 9 637

1-yes 30 35 31 3 26 34 47 58

2-no 29 28 23 4 13 28 42 60

Post-Work

Post-Clean

PostVerification
F-11 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

Rule Base Rule Base Rule Base

Figure F2.7a. Box Plots of Interior Air Dust Lead Concentration in the Work Room by 

Stage and Cleaning Type 

Table F2.7a. Descriptive Summary of Interior Air Dust Lead Concentration in the Work 

Room by Stage and Cleaning Type 

Stage

Work Room - Air 

Lead (Cleaning)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-rule 30 168 10 1 3 4 31 3651

2-base 30 70 9 1 3 5 23 1444

1-rule 30 34 6 3 3 3 4 637

2-base 30 12 5 3 4 4 4 175

1-rule 29 37 33 9 24 35 48 60

2-base 30 27 21 3 13 28 42 56

PostVerification

Post-Work

Post-Clean
F-12 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

I II III IV I II III IV I II III IV

Figure F2.8a. Box Plots of Interior Air Dust Lead Concentration in the Work Room by 

Stage and Phase 

Table F2.8a. Descriptive Summary of Interior Air Dust Lead Concentration in the Work 

Room by Stage and Phase 

Stage

Work Room - Air 

Lead (Phase)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

I-Rule w/ Plastic 15 275 14 1 4 5 91 3651

II-Base w/ Plastic 15 25 10 2 3 7 25 147

III-Rule w/o Plastic 15 62 7 1 2 4 13 696

IV-Base w/o Plastic 15 115 8 1 3 4 9 1444

I-Rule w/ Plastic 15 8 5 3 3 4 5 38

II-Base w/ Plastic 15 4 4 3 4 4 4 9

III-Rule w/o Plastic 15 61 7 3 3 3 4 637

IV-Base w/o Plastic 15 20 7 3 4 4 10 175

I-Rule w/ Plastic 15 38 34 12 21 42 56 58

II-Base w/ Plastic 15 32 28 3 26 31 43 56

III-Rule w/o Plastic 14 35 32 9 24 33 48 60

IV-Base w/o Plastic 15 21 16 4 10 14 42 48

Post-Clean

Post-Work

PostVerification
F-13 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

Yes No Yes No Yes No

Figure F2.9a. Box Plots of Interior Air Dust Lead Concentration in the Work Room by 

Stage and Restricted Job 

Table F2.9a. Descriptive Summary of Interior Air Dust Lead Concentration in the Work 

Room by Stage and Restricted Job 

Stage

Work Room - Air 

Lead (Restricted 

Job)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-yes 28 244 20 1 2 9 104 3651

2-no 32 10 5 1 3 4 8 110

1-yes 28 21 6 3 3 4 7 229

2-no 32 25 5 3 3 4 4 637

1-yes 28 35 30 7 24 34 48 60

2-no 31 29 24 3 17 28 43 57

PostVerification

Post-Work

Post-Clean
F-14 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

T VT W T VT W T VT W

Figure F2.10a. Box Plots of Interior Air Dust Lead Concentration in the Work Room by 

Stage and Work Room Floor Type 

Table F2.10a. Descriptive Summary of Interior Air Dust Lead Concentration in the Work 

Room by Stage and Work Room Floor Type 

Stage

Work Room - Air 

Lead (Floor Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Tile 17 18 7 1 4 4 7 110

Vinyl Tile 21 261 10 2 3 4 9 3651

Wood 22 62 12 1 2 9 60 696

Tile 17 5 4 3 3 3 4 25

Vinyl Tile 21 38 6 3 4 4 4 637

Wood 22 23 6 3 3 4 5 229

Tile 17 31 25 3 19 33 47 60

Vinyl Tile 20 31 26 4 18 31 43 57

Wood 22 33 28 8 22 34 48 58

Post-Work

Post-Clean

PostVerification
F-15 

Post Work Post Cleaning Post Verification 

Work Room Air Lead ( g/cubic meter)

1

10

100

1000

10000

PFG PFG PFG

Figure F2.11a. Box Plots of Interior Air Dust Lead Concentration in the Work Room by 

Stage and Work Room Floor Condition 

Table F2.11a. Descriptive Summary of Interior Air Dust Lead Concentration in the Work 

Room by Stage and Work Room Floor Condition 

Stage

Work Room - Air 

Lead (Floor 

Condition)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Poor 27 250 19 1 3 9 118 3651

Fair 11 16 7 3 4 4 13 64

Good 22 10 5 1 3 4 7 110

Poor 27 46 9 3 3 4 14 637

Fair 11 4 4 3 4 4 4 9

Good 22 5 4 3 3 3 4 25

Poor 27 31 25 4 12 31 48 58

Fair 10 35 28 3 28 38 47 57

Good 22 31 28 11 20 30 42 60

Post-Clean

PostVerification

Post-Work
F-16 

F3. Exploratory Summaries of Interior Air Dust Lead Concentrations vs. Select 

Continuous Characteristics 

Scatter plots of the dust lead concentrations recorded in the air are presented in this section to 

illustrate and summarize the distribution of these factors as a function of select characteristics. 

The fitted linear regression line (using untransformed data) is displayed in each plot along with 

its associated r-square value. 

The selected characteristics are as follows: 

17. Paint Lead Concentration 

18. Floor Dust Lead Loading at Clearance 

19. Sill Dust Lead Loading at Clearance 

20. Initial Average Soil Lead Concentration 

21. Final Average Soil Lead Concentration 

22. Disturbed Area 

23. Avg. Floor Dust Lead (with Bulk) in Post-Work Work Room 
F-17 

Work Room Air Dust (PW)

1

10

100

1000

10000

Average Paint Lead Concentration (ppm) (R-Square = 3.59%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

o

o

o o

o

o

oo

o

oo

o

o

o

o

o

o

o

o

o

o

o

oo

ooo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Work Room Air Dust (PC)

1

10

100

1000

Average Paint Lead Concentration (ppm) (R-Square = 0.52%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

oo

o

oo o

ooo

oo

o

o

o

o

o

oo

ooo

o

ooooo o

oooo

o

o

oo

o

oo

o

oooo

o

o

o

o

o

o

o

o

Work Room Air Dust (PV)

1

10

100

Average Paint Lead Concentration (ppm) (R-Square = 0.3%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

oo

o

o

o

o

o

o

o

o

oo

o

oo

oo

o

o

o

o

o

o

oo

o

o

o o

o

o

oo

o

o

oo

o

o

o

o o o

o

o

o

o

o o

o

o

o

o

o

o

Figure F3.1a. Scatter Plots of Work Room Air Dust Lead Concentration by Stage and 

Average Paint Lead Concentration 
F-18 

Work Room Air Dust (PW)

1

10

100

1000

10000

Average Floor Dust Lead Loading at Clearance (R-Square = 50.33%)

1 10 100 1000

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

oo

o o o

o

Work Room Air Dust (PC)

1

10

100

1000

Average Floor Dust Lead Loading at Clearance (R-Square = 0.51%)

1 10 100 1000

ooo

o

o

o

oo

o

o

o

oo

o

ooo o

o

oooo

o

o

o

o

o

oo o

o

o

o

o

oo

o

o o o

o

Work Room Air Dust (PV)

1

10

100

Average Floor Dust Lead Loading at Clearance (R-Square = 3%)

1 10 100 1000

o

o

o

o

o

o

o

o

o

o

oo

o

oo

o

o

o

oo

o

o

oo

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

o

o

o

Figure F3.2a. Scatter Plots of Interior Air Dust Lead Concentration by Stage and Floor 

Dust Lead Loading at Clearance 
F-19 

Work Room Air Dust (PW)

1

10

100

1000

10000

Average Sill Dust Lead Loading at Clearance (R-Square = 11.07%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

o

oo

oo

o

oo

oo

o

o

o

oo

oo

o

o

o

o

o

o o

o

o

Work Room Air Dust (PC)

1

10

100

1000

Average Sill Dust Lead Loading at Clearance (R-Square = 0.13%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

oo

o

o

oo

o

oo

o

ooooooo

o

oo

o

oo o

o

o

Work Room Air Dust (PV)

1

10

100

Average Sill Dust Lead Loading at Clearance (R-Square = 5.73%)

0.1 1.0 10.0 100.0 1000.0 10000.0

o

o

o

ooo

oo

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o

o

o

Figure F3.3a. Scatter Plots of Work Room Air Dust Lead Concentration by Stage and Sill 

Dust Lead Loading at Clearance 
F-20 

Work Room Air Dust (PW)

1

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 1.76%)

0 1000 2000 3000 4000

o

o

o

o

o

o

o

o

o

o

o

oooo

ooooo

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o o

o

Work Room Air Dust (PC)

1

10

100

1000

Average Initial Soil Lead Loading (R-Square = 0.74%)

0 1000 2000 3000 4000 5000 6000

o

o

ooo

o

o

ooo

o

ooo

oo

ooo

o

ooo

o

o

o

o

o

oo o o

o

o

o o

o

o

o

o o

Work Room Air Dust (PV)

1

10

100

Average Initial Soil Lead Loading (R-Square = 5.19%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o o

o

oo o

o o o

Figure F3.4a. Scatter Plots of Work Room Air Dust Lead Concentration by Stage and 

Initial Average Soil Lead Concentration 
F-21 

Work Room Air Dust (PW)

1

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 1.25%)

0 1000 2000 3000 4000 5000

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

Work Room Air Dust (PC)

1

10

100

1000

Average Final Soil Lead Loading (R-Square = 0.67%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

oo

o

oooo

o

oo

oo

o

o

oo

oo

oooooooo

o

o

o

o

oo

oo

o

o o o

o

Work Room Air Dust (PV)

1

10

100

Average Final Soil Lead Loading (R-Square = 10.69%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

oo

o

o

o

o

o

o

o

o

o

o

o o ooo

o

o o

o

o o

o o

Figure F3.5a. Scatter Plots of Work Room Air Dust Lead Concentration by Stage and 

Final Average Soil Lead Concentration 
F-22 

Work Room Air Dust (PW)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 0.05%)

0 10 20 30 40 50 60 70 80 90 100 110

oo

o

ooo

o

o

oo

o

o

o

o

o

o

oo

o o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo o

oo

o

o o

o

oo

o

o

oo

o

o

o

o o

Work Room Air Dust (PC)

1

10

100

1000

Disturbed Area (Sq. Feet) (R-Square = 0.77%)

0 10 20 30 40 50 60 70 80 90 100 110

ooo

o

oo

o

o

ooooo o

o

oo

o

oo

oo

o

o

o o

o

o

o

o

o

o

o

o o

o

oo o

o

oooooo

o

oo

o

Work Room Air Dust (PV)

1

10

100

Disturbed Area (Sq. Feet) (R-Square = 0.41%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

o

o

o

o

o

oo

o

oo

o

oo

o o

o

oo

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

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Figure F3.6a. Scatter Plots of Work Room Air Dust Lead Concentration by Stage and 

Disturbed Area (ft2

) 
F-23 

Work Room Air Dust (PW)

1

10

100

1000

10000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 5.64%)

10 100 1000 10000 100000 1000000 10000000

o o

o

o

o

oo

o

o

o

oo

o

o

o

o

o

o

o

o

o

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o

o

o

o

oo

o

o

o

o

oo

o

o

o

o

o

o

oo

o

oo

o

o

Work Room Air Dust (PC)

1

10

100

1000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 0.37%)

10 100 1000 10000 100000 1000000 10000000

o o

o o ooooo o o

ooo

o

o

ooo

o

o o o

o

ooo

o

ooo

o

ooo oo

o

o

o

ooo

oo

o

o

o

o

o

oo

o

o

o

o

o

Work Room Air Dust (PV)

1

10

100

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 0.77%)

10 100 1000 10000 100000 1000000 10000000

o o

o

o

o

o

o

o

o

o

o

o

o

o

oo

oo

o

o

o o

o

o

o

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o

o

oo

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o

o

o

oo

o

oo

o

o

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o

Figure F3.7a. Scatter Plots of Work Room Air Dust Lead Concentration by Stage and Avg. 

Floor Dust Lead (with Bulk) in Post-Work Work Room 
APPENDIX G 

DETAILED DESCRIPTIVE ANALYSES OF AVERAGE POSTWORK WORK ROOM FLOOR DUST LEAD LOADING, 

AVERAGE PAINT LEAD LOADING, AND AREA DISTURBED 
G-1 

APPENDIX G 

Exploratory Analyses of Average Post-work Work Room Floor Dust Lead 

Loading, Average Paint Lead Concentration, and Square Footage Disturbed 

G1. Exploratory Summaries of Average Post-Work Work Room Floor Dust Lead 

Loading vs. Select Categorical Characteristics 

Box plots of the average post-work work room floor dust lead loading as well as descriptive 

statistical summary tables are presented in this section to illustrate and summarize the 

distribution of these factors as a function of select characteristics. Numerical summaries are 

presented for interior floor, sill, and exit samples; all exterior samples are missing this 

information. Exit samples have been excluded from the graphical displays, which contain 

placeholders for the exterior samples. 

The selected characteristics are as follows: 

39. Job intensity 

40. City 

41. Job type 

42. Contractor 

43. Rule Plastic Use 

44. Cleaning Type 

45. Phase 

46. Restricted vs. non-restricted jobs 

47. Work room floor type 

48. Work room floor condition 

Scatter plots of the average post-work work room floor dust lead loading are presented in this 

section to illustrate and summarize the distribution of these factors as a function of select 

characteristics. The fitted linear regression line (using untransformed data) is displayed in each 

plot along with its associated r-square value. 

The selected characteristics are as follows: 

49. Paint Lead Concentration 

50. Floor Dust Lead Loading at Clearance 

51. Initial Average Soil Lead Concentration 

52. Final Average Soil Lead Concentration 

53. Disturbed Area 

In the summary tables, summary data are presented for three data sets – floors, sills, and interior 

exit samples; however, the floor and sill data are always equal and the interior exit data are a 

subset of the floor/sill results. Thus, it is generally sufficient to restrict review to the interior 

floor results. At the time of submission of this report, some boxplots mistakenly omitted plots 

for the interior exit samples, and some interior exit plots are mislabeled as Exterior data. These 

will be corrected if subsequent revisions are made to the report.
G-2 

Interior Floor Interior Sill Exterior 

10

100

1000

10000

100000

1000000

10000000

LMH LMH LMH

Figure G1.1a. Box Plots of Average Post-Work Work Room Floor Dust Lead Loading by 

Analysis and Job Intensity Level 

Table G1.1a. Descriptive Summary of Average Post-Work Work Room Floor Dust Lead 

Loading by Analysis and Job Intensity Level 

Analysis

Avg. Post-Work 

Workroom Floor 

Lead Loading (w/ 

Bulk) by Intensity

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 16 807527 290961 2033 86933 640684 1143724 2581073

2-Medium 15 828584 417251 22769 209260 584920 1233188 3159913

3-Low 16 68593 17094 24 10819 18018 97860 372211

1-High 20 646568 102268 162 8692 202458 1001517 2581073

2-Medium 20 774671 392515 22769 182545 602531 1218968 3159913

3-Low 20 67515 15134 24 6848 18018 112017 372211

1-High 20 646568 102268 162 8692 202458 1001517 2581073

2-Medium 20 774671 392515 22769 182545 602531 1218968 3159913

3-Low 20 67515 15134 24 6848 18018 112017 372211

Interior

Sill

Interior

Exit

Interior

Floor
G-3 

Interior Floor Interior Sill Exterior 

10

100

1000

10000

100000

1000000

10000000

OH PA OH PA OH PA

Figure G1.2a. Box Plots of Average Post-Work Work Room Floor Dust Lead Loading by 

Analysis and City 

Table G1.2a. Descriptive Summary of Average Post-Work Work Room Floor Dust Lead 

Loading by Analysis and City 

Analysis

Avg. Post-Work 

Workroom Floor 

Lead Loading (w/ 

Bulk) by City

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Columbus, OH 36 561974 130694 24 39780 216225 869404 3159913

Pittsburgh, PA 11 565054 105766 11698 12044 79807 1074140 2308809

Columbus, OH 38 533274 113269 24 29620 210147 824669 3159913

Pittsburgh, PA 22 432304 51258 162 11698 86933 641336 2308809

Columbus, OH 38 533274 113269 24 29620 210147 824669 3159913

Pittsburgh, PA 22 432304 51258 162 11698 86933 641336 2308809

Interior

Exit

Interior

Floor

Interior

Sill
G-4 

Interior Floor Interior Sill Exterior 

10

100

1000

10000

100000

1000000

10000000

1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7 1 2 3 4 5 6 7 8

Figure G1.3a. Box Plots of Average Post-Work Work Room Floor Dust Lead Loading by 

Analysis and Job Type 

Table G1.3a. Descriptive Summary of Average Post-Work Work Room Floor Dust Lead 

Loading by Analysis and Job Type 

Analysis

Avg. Post-Work 

Workroom Floor 

Lead Loading (w/ 

Bulk) by Job Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

I1-Cut Outs 8 105900 18196 24 9136 61230 167117 372211

I2-Replace Windows 8 31285 16060 3485 10819 11873 22586 156242

I3-Scrape Surface * 4 1566578 1268151 584920 704795 1260739 2428361 3159913

I4-Scrape Door * 7 693887 333204 22769 133611 255081 1233188 1786396

I5-Heat gun < 1100° 4 326309 203505 29620 119440 327738 533179 620142

I6-Heat gun > 1100° * 12 1061069 703829 73877 442082 921516 1582807 2581073

I7-Kitchen 4 46899 20556 2033 6865 45752 86933 94059

I1-Cut Outs 12 91668 14547 24 1796 61230 136117 372211

I2-Replace Windows 8 31285 16060 3485 10819 11873 22586 156242

I3-Scrape Surface * 8 1162506 864342 155831 613128 865000 1514022 3159913

I4-Scrape Door * 8 611017 247553 22769 82270 238248 1218968 1786396

I5-Heat gun < 1100° 4 326309 203505 29620 119440 327738 533179 620142

I6-Heat gun > 1100° * 12 1061069 703829 73877 442082 921516 1582807 2581073

I7-Kitchen 8 24817 5664 162 2218 4188 45752 94059

I1-Cut Outs 12 91668 14547 24 1796 61230 136117 372211

I2-Replace Windows 8 31285 16060 3485 10819 11873 22586 156242

I3-Scrape Surface * 8 1162506 864342 155831 613128 865000 1514022 3159913

I4-Scrape Door * 8 611017 247553 22769 82270 238248 1218968 1786396

I5-Heat gun < 1100° 4 326309 203505 29620 119440 327738 533179 620142

I6-Heat gun > 1100° * 12 1061069 703829 73877 442082 921516 1582807 2581073

I7-Kitchen 8 24817 5664 162 2218 4188 45752 94059

InteriorSill

InteriorFloor

InteriorExit

* 

Indicates job is restricted 
G-5 

Interior Floor Interior Sill Exterior 

10

100

1000

10000

100000

1000000

10000000

C2 C3 C4 C2 C3 C4 C1 C2 C3 C4

Figure G1.4a. Box Plots of Average Post-Work Work Room Floor Dust Lead Loading by 

Analysis and Contractor 

Table G1.4a. Descriptive Summary of Average Post-Work Work Room Floor Dust Lead 

Loading by Analysis and Contractor 

Analysis

Avg. Post-Work 

Workroom Floor 

Lead Loading (w/ 

Bulk) by Contractor

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C2 20 739998 367663 29620 134905 515568 921516 3159913

C3 16 339445 35873 24 6848 78190 313646 1786396

C4 11 565054 105766 11698 12044 79807 1074140 2308809

C2 20 739998 367663 29620 134905 515568 921516 3159913

C3 18 303580 30617 24 3485 26849 255081 1786396

C4 22 432304 51258 162 11698 86933 641336 2308809

C2 20 739998 367663 29620 134905 515568 921516 3159913

C3 18 303580 30617 24 3485 26849 255081 1786396

C4 22 432304 51258 162 11698 86933 641336 2308809

Interior

Exit

Interior

Floor

Interior

Sill
G-6 

Interior Floor Interior Sill 

10

100

1000

10000

100000

1000000

10000000

Yes No Yes No

Figure G1.5a. Box Plots of Average Post-Work Work Room Floor Dust Lead Loading by 

Analysis and Rule Plastic Use 

Table G1.5a. Descriptive Summary of Average Post-Work Work Room Floor Dust Lead 

Loading by Analysis and Rule Plastic Use 

Analysis

Avg. Post-Work 

Workroom Floor 

Lead Loading (w/ 

Bulk) by Plastic

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-yes 24 532580 100332 24 20674 210147 784826 3159913

2-no 23 594120 155635 3485 26593 146609 928893 2581073

1-yes 30 465926 75450 24 18580 156037 655512 3159913

2-no 30 526577 95070 179 11701 140110 824669 2581073

1-yes 30 465926 75450 24 18580 156037 655512 3159913

2-no 30 526577 95070 179 11701 140110 824669 2581073

Interior

Exit

Interior

Floor

Interior

Sill

A Note that this variable was not applied to exterior data
G-7 

Interior Floor Interior Sill 

10

100

1000

10000

100000

1000000

10000000

Rule Base Rule Base

Figure G1.6a. Box Plots of Average Post-Work Work Room Floor Dust Lead Loading by 

Analysis and Cleaning Type 

Table G1.6a. Descriptive Summary of Average Post-Work Work Room Floor Dust Lead 

Loading by Analysis and Cleaning Type 

Analysis

Avg. Post-Work 

Workroom Floor 

Lead Loading (w/ 

Bulk) by Cleaning

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-rule 24 534246 136603 816 22024 238248 876781 2308809

2-base 23 592381 112787 24 22769 156242 914140 3159913

1-rule 30 479146 75563 162 11698 157738 824669 2308809

2-base 30 513357 94927 24 22769 147821 625856 3159913

1-rule 30 479146 75563 162 11698 157738 824669 2308809

2-base 30 513357 94927 24 22769 147821 625856 3159913

Interior

Sill

Interior

Exit

Interior

Floor

A Note that this variable was not applied to exterior data
G-8 

Interior Floor Interior Sill 

10

100

1000

10000

100000

1000000

10000000

I II III IV I II III IV

Figure G1.7a. Box Plots of Average Post-Work Work Room Floor Dust Lead Loading by 

Analysis and Phase 

Table G1.7a. Descriptive Summary of Average Post-Work Work Room Floor Dust Lead 

Loading by Analysis and Phase 

Analysis

Avg. Post-Work 

Workroom Floor 

Lead Loading (w/ 

Bulk) by Phase

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

I-Rule w/ Plastic 12 556306 148869 816 42282 420000 930130 1952307

II-Base w/ Plastic 12 508854 67620 24 20674 182751 586224 3159913

III-Rule w/o Plastic 12 512187 125348 3485 22024 147647 876781 2308809

IV-Base w/o Plastic 11 683501 197078 11427 29620 146609 1696810 2581073

I-Rule w/ Plastic 15 505596 81686 162 10211 255081 905332 1952307

II-Base w/ Plastic 15 426256 69690 24 22769 155831 258307 3159913

III-Rule w/o Plastic 15 452696 69900 179 11698 73877 824669 2308809

IV-Base w/o Plastic 15 600458 129302 2402 11701 146609 1331235 2581073

I-Rule w/ Plastic 15 505596 81686 162 10211 255081 905332 1952307

II-Base w/ Plastic 15 426256 69690 24 22769 155831 258307 3159913

III-Rule w/o Plastic 15 452696 69900 179 11698 73877 824669 2308809

IV-Base w/o Plastic 15 600458 129302 2402 11701 146609 1331235 2581073

Interior

Exit

Interior

Floor

Interior

Sill

A Note that this variable was not applied to exterior data 
G-9 

Interior Floor Interior Sill 

10

100

1000

10000

100000

1000000

10000000

Yes No Yes No

Figure G1.8a. Box Plots of Average Post-Work Work Room Floor Dust Lead Loading by 

Analysis and Restricted Job 

Table G1. 8a. Descriptive Summary of Average Post-Work Work Room Floor Dust Lead 

Loading by Analysis and Restricted Job 

Analysis

Avg. Post-Work 

Workroom Floor 

Lead Loading (w/ 

Bulk) by Restricted 

Job

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-yes 23 1037233 621010 22769 255081 914140 1696810 3159913

2-no 24 107930 26637 24 11562 28106 139721 620142

1-yes 28 961465 553734 22769 238248 865000 1282212 3159913

2-no 32 89190 16381 24 3130 18018 112017 620142

1-yes 28 961465 553734 22769 238248 865000 1282212 3159913

2-no 32 89190 16381 24 3130 18018 112017 620142

Interior

Sill

Interior

Exit

Interior

Floor

A Note that this variable was not applied to exterior data 
G-10 

Interior Floor Interior Sill 

10

100

1000

10000

100000

1000000

10000000

Tile Vinyl Tile Wood Tile Vinyl Tile Wood

Figure G1.9a. Box Plots of Average Post-Work Work Room Floor Dust Lead Loading by 

Analysis and Work Room Floor Type 

Table G1. 9a. Descriptive Summary of Average Post-Work Work Room Floor Dust Lead 

Loading by Analysis and Work Room Floor Type 

Analysis

Avg. Post-Work 

Workroom Floor 

Lead Loading (w/ 

Bulk) by Floor Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Tile 17 184900 49281 24 29620 123200 221416 655512

Vinyl Tile 8 462498 141863 11698 48631 113835 788479 1786396

Wood 22 891063 242470 3485 18580 725262 1233188 3159913

Tile 17 184900 49281 24 29620 123200 221416 655512

Vinyl Tile 21 334686 43618 162 5687 94059 372211 1786396

Wood 22 891063 242470 3485 18580 725262 1233188 3159913

Tile 17 184900 49281 24 29620 123200 221416 655512

Vinyl Tile 21 334686 43618 162 5687 94059 372211 1786396

Wood 22 891063 242470 3485 18580 725262 1233188 3159913

Interior

Exit

Interior

Floor

Interior

Sill
G-11 

Interior Floor Interior Sill 

10

100

1000

10000

100000

1000000

10000000

Poor Fair Good Poor Fair Good

Figure G1.10a. Box Plots of Average Post-Work Work Room Floor Dust Lead Loading by 

Analysis and Work Room Floor Condition 

Table G1.10a. Descriptive Summary of Average Post-Work Work Room Floor Dust Lead 

Loading by Analysis and Work Room Floor Condition 

Analysis

Avg. Post-Work 

Workroom Floor 

Lead Loading (w/ 

Bulk) by Floor 

Condition

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Poor 25 923181 308771 3485 133611 824669 1233188 3159913

Fair 10 47092 9420 24 2033 17235 79807 221416

Good 12 241353 160681 29620 73199 177934 352262 655512

Poor 27 856031 236873 2402 18580 625856 1233188 3159913

Fair 11 43327 8998 24 2033 11701 79807 221416

Good 22 281166 73541 162 49939 147821 446216 1331235

Poor 27 856031 236873 2402 18580 625856 1233188 3159913

Fair 11 43327 8998 24 2033 11701 79807 221416

Good 22 281166 73541 162 49939 147821 446216 1331235

Interior

Floor

Interior

Sill

Interior

Exit
G-12 

10

100

1000

10000

100000

1000000

10000000

Floor - Average Paint Lead Concentration (ppm) (R-Square = 5.62%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

o

o

o

o

o

o

o

o

o

o

ooo

o

oo

o

o

oo

o

o

o

o

o

o

o

o

o o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

oo

o o

o

o

o

o

o

o

10

100

1000

10000

100000

1000000

10000000

Sill - Average Paint Lead Concentration (ppm) (R-Square = 5.62%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

o

o

o

o

o

o

o

o

o

o

o

o

o

ooo

o

oo

o

o

oo

o

o

o

o

o

o

o

o

o o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

oo

o o

o

o

o

o

o

o

Figure G1.11. Scatter Plots of Average Post-Work Work Room Floor Dust Lead Loading 

by Analysis and Average Paint Lead Concentration for Interior Floors and 

Sills 
G-13 

10

100

1000

10000

100000

1000000

10000000

Floor - Average Floor Dust Lead Loading at Clearance (R-Square = 3.28%)

1 10 100 1000

o

o

o

o

o

o

o

o

o

oo

o

o

o

oo

o

o

o

o

o

o

oo

o

o

oo

o

o

o

o

o

o o

o

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

10

100

1000

10000

100000

1000000

10000000

Sill - Average Floor Dust Lead Loading at Clearance (R-Square = 3.28%)

1 10 100 1000

o

o

o

o

o

o

o

o

o

oo

o

o

o

oo

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o o

o

o

o

o

o

o

o

ooo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

Figure G1.12. Scatter Plots of Average Post-Work Work Room Floor Dust Lead Loading 

by Analysis and Floor Dust Lead Loading at Clearance 
G-14 

10

100

1000

10000

100000

1000000

10000000

Floor - Average Initial Soil Lead Loading (R-Square = 0.46%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

o

o

o

o

o

o

o o

o

o

o

o

o

o

o

o

o

10

100

1000

10000

100000

1000000

10000000

Sill - Average Initial Soil Lead Loading (R-Square = 0.46%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

oo

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o o

o

o

o

o

o

o

o o

o

o

o

o

o

o

o

o

o

Figure G1.13. Scatter Plots of Average Post-Work Work Room Floor Dust Lead Loading 

by Analysis and Initial Average Soil Lead Concentration 
G-15 

10

100

1000

10000

100000

1000000

10000000

Floor - Average Final Soil Lead Loading (R-Square = 3.44%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o o

o o

o

10

100

1000

10000

100000

1000000

10000000

Sill - Average Final Soil Lead Loading (R-Square = 3.44%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

o

oo

o

o o

o o

o

Figure G1.14. Scatter Plots of Average Post-Work Work Room Floor Dust Lead Loading 

by Analysis and Final Average Soil Lead Concentration 
G-16 

100

1000

10000

100000

1000000

10000000

Floor - Disturbed Area (Sq. Feet) (R-Square = 27.73%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

o

oo

o

o

o

o

o

o o o

o

o o

o

o

o

oo

o

o

o

o

o

o

o o

o

o

o

o

o

ooo

o

o

o

o

o

oo

o

o

o

o

o

o o

o

o

100

1000

10000

100000

1000000

10000000

Sill - Disturbed Area (Sq. Feet) (R-Square = 27.73%)

0 10 20 30 40 50 60 70 80 90 100 110

o

o

o

oo

o

o

o

o

o

o o o

o

o o

o

o

o

oo

o

o

o

o

o

o

o o

o

o

o

o

o

ooo

o

o

o

o

o

oo

o

o

o

o

o

o o

o

o

Figure G1.15. Scatter Plots of Average Post-Work Work Room Floor Dust Lead Loading 

by Analysis and Disturbed Area (ft2) 
G-17 

G2. Exploratory Summaries of Average Paint Lead Concentration vs. Select 

Categorical Characteristics 

Box plots of the average paint lead concentration as well as descriptive statistical summary tables 

are presented in this section to illustrate and summarize the distribution of these factors as a 

function of select characteristics. Numerical summaries are presented for interior floor, sill and 

exit samples; all exterior samples are missing this information. Exit samples have been excluded 

from the graphical displays, which contain placeholders for the exterior samples. 

The selected characteristics are as follows: 

1. Job intensity 

2. City 

3. Job type 

4. Contractor 

5. Rule Plastic Use 

6. Cleaning Type 

7. Phase 

8. Restricted vs. non-restricted jobs 

9. Work room floor type 

10. Work room floor condition 

Scatter plots of the average paint lead concentration are presented in this section to illustrate and 

summarize the distribution of these factors as a function of select characteristics. The fitted 

linear regression line (using untransformed data) is displayed in each plot along with its 

associated r-square value. 

The selected characteristics are as follows: 

11. Average Post-Work Work Room Floor Dust Lead Loading 

12. Floor Dust Lead Loading at Clearance 

13. Initial Average Soil Lead Concentration 

14. Final Average Soil Lead Concentration 

15. Disturbed Area 
G-18 

Interior Floor Interior Sill Exterior 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

LMH LMH LMH

Figure G2.1a. Box Plots of Average Paint Lead Concentration by Analysis and Job 

Intensity Level 

Table G2.1a. Descriptive Summary of Average Paint Lead Concentration by Analysis and 

Job Intensity Level 

Analysis

Avg. Paint Lead 

Concentration (ppm) 

by Intensity

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 16 4 3 1 2 3 7 10

2-Medium 15 4 3 1 2 2 4 13

3-Low 16 5 3 1 2 4 7 10

1-High 20 4 3 1 2 3 5 10

2-Medium 20 3 3 1 2 2 3 13

3-Low 20 4 3 1 2 4 7 10

1-High 20 4 3 1 2 3 5 10

2-Medium 20 3 3 1 2 2 3 13

3-Low 20 4 3 1 2 4 7 10

1-High 5 11 10 3 11 12 13 18

2-Medium 5 13 6 1 1 13 16 32

3-Low 5 12 11 5 10 12 15 17

Interior

Floor

Interior

Sill

Exterior

Interior

Exit
G-19 

Interior Floor Interior Sill Exterior 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

OH PA OH PA OH PA

Figure G2.2a. Box Plots of Average Paint Lead Concentration by Analysis and City 

Table G2.2a. Descriptive Summary of Average Paint Lead Concentration by Analysis and 

City 

Analysis

Avg. Paint Lead 

Concentration (ppm) 

by City

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Columbus, OH 36 4 3 1 2 3 7 13

Pittsburgh, PA 11 4 3 1 2 4 5 10

Columbus, OH 38 4 3 1 2 3 7 13

Pittsburgh, PA 22 3 3 1 2 3 4 10

Columbus, OH 38 4 3 1 2 3 7 13

Pittsburgh, PA 22 3 3 1 2 3 4 10

Columbus, OH 10 13 9 1 5 13 16 32

Pittsburgh, PA 5 11 9 3 10 11 12 17

Interior

Sill

Exterior

Interior

Exit

Interior

Floor
G-20 

Interior Floor Interior Sill Exterior 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7 1 2 3 4 5 6 7 8

Figure G2.3a. Box Plots of Average Paint Lead Concentration by Analysis and Job Type 
G-21 

Table G2.3a. Descriptive Summary of Average Paint Lead Concentration by Analysis and 

Job Type 

Analysis

Avg. Paint Lead 

Concentration (ppm) 

by Job Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

I1-Cut Outs 8 5 3 1 1 5 7 10

I2-Replace Windows 8 5 4 1 2 4 7 10

I3-Scrape Surface * 4 2 22 2 2 2 3

I4-Scrape Door * 7 4 31 2 3 6 8

I5-Heat gun < 1100° 4 5 4 2 2 3 8 13

I6-Heat gun > 1100° * 12 5 4 2 2 4 8 10

I7-Kitchen 4 2 21 1 2 3 4

I1-Cut Outs 12 4 3 1 2 4 7 10

I2-Replace Windows 8 5 4 1 2 4 7 10

I3-Scrape Surface * 8 2 22 2 2 3 3

I4-Scrape Door * 8 3 31 2 3 5 8

I5-Heat gun < 1100° 4 5 4 2 2 3 8 13

I6-Heat gun > 1100° * 12 5 4 2 2 4 8 10

I7-Kitchen 8 2 21 1 2 3 5

I1-Cut Outs 12 4 3 1 2 4 7 10

I2-Replace Windows 8 5 4 1 2 4 7 10

I3-Scrape Surface * 8 2 22 2 2 3 3

I4-Scrape Door * 8 3 31 2 3 5 8

I5-Heat gun < 1100° 4 5 4 2 2 3 8 13

I6-Heat gun > 1100° * 12 5 4 2 2 4 8 10

I7-Kitchen 8 2 21 1 2 3 5

E1-Door Replacement 2 11 11 10 10 11 12 12

E2-Replace Trim Soffit 2 16 16 15 15 16 17 17

E3-Rotopene 1 5 55 5 5 5 5

E4--Heat gun < 1100° 1 32 32 32 32 32 32 32

E5-Dry Scrape 4 8 4 1 1 7 15 16

E6-Power Sanding 2 12 12 12 12 12 13 13

E7-Torching 2 7 6 3 3 7 11 11

E8-Heat gun > 1100° * 1 18 18 18 18 18 18 18

Exterior

InteriorExit

InteriorFloor

InteriorSill

* Indicates job is restricted 
G-22 

Interior Floor Interior Sill Exterior 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

C2 C3 C4 C2 C3 C4 C1 C2 C3 C4

Figure G2.4a. Box Plots of Average Paint Lead Concentration by Analysis and Contractor 

Table G2.4a. Descriptive Summary of Average Paint Lead Concentration by Analysis and 

Contractor 

Analysis

Avg. Paint Lead 

Concentration (ppm) 

by Contractor

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C2 20 5 4 2 2 3 7 13

C3 16 4 3 1 2 3 7 10

C4 11 4 3 1 2 4 5 10

C2 20 5 4 2 2 3 7 13

C3 18 4 3 1 2 3 6 10

C4 22 3 3 1 2 3 4 10

C2 20 5 4 2 2 3 7 13

C3 18 4 3 1 2 3 6 10

C4 22 3 3 1 2 3 4 10

C1 3 13 13 12 12 13 13 13

C2 4 18 15 5 10 17 25 32

C3 3 6 3 1 1 1 16 16

C4 5 11 9 3 10 11 12 17

Interior

Floor

Interior

Sill

Exterior

Interior

Exit
G-23 

Interior Floor Interior Sill 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Yes No Yes No

Figure G2.5a. Box Plots of Average Paint Lead Concentration by Analysis and Rule Plastic 

Use 

Table G2.5a. Descriptive Summary of Average Paint Lead Concentration by Analysis and 

Rule Plastic Use 

Analysis

Avg. Paint Lead 

Concentration (ppm) 

by Plastic

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-yes 24 4 3 1 2 3 7 13

2-no 23 4 3 2 2 3 7 10

1-yes 30 4 3 1 2 3 5 13

2-no 30 4 3 2 2 3 5 10

1-yes 30 4 3 1 2 3 5 13

2-no 30 4 3 2 2 3 5 10

Interior

Exit

Interior

Floor

Interior

Sill

A Note that this variable was not applied to exterior data
G-24 

Interior Floor Interior Sill 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Rule Base Rule Base

Figure G2.6a. Box Plots of Average Paint Lead Concentration by Analysis and Cleaning 

Type 

Table G2.6a. Descriptive Summary of Average Paint Lead Concentration by Analysis and 

Cleaning Type 

Analysis

Avg. Paint Lead 

Concentration (ppm) 

by Cleaning

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-rule 24 4 3 1 2 3 7 13

2-base 23 4 3 1 2 2 7 10

1-rule 30 4 3 1 2 3 6 13

2-base 30 4 3 1 2 3 5 10

1-rule 30 4 3 1 2 3 6 13

2-base 30 4 3 1 2 3 5 10

Interior

Exit

Interior

Floor

Interior

Sill

A Note that this variable was not applied to exterior data 
G-25 

Interior Floor Interior Sill 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

I II III IV I II III IV

Figure G2.7a. Box Plots of Average Paint Lead Concentration by Analysis and Phase 

Table G2.7a. Descriptive Summary of Average Paint Lead Concentration by Analysis and 

Phase 

Analysis

Avg. Paint Lead 

Concentration (ppm) 

by Phase

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

I-Rule w/ Plastic 12 5 3 1 2 4 7 13

II-Base w/ Plastic 12 4 3 1 1 2 6 10

III-Rule w/o Plastic 12 4 3 2 2 3 7 10

IV-Base w/o Plastic 11 4 3 2 2 2 7 10

I-Rule w/ Plastic 15 4 3 1 2 4 7 13

II-Base w/ Plastic 15 4 3 1 2 3 5 10

III-Rule w/o Plastic 15 4 3 2 2 3 6 10

IV-Base w/o Plastic 15 4 3 2 2 3 5 10

I-Rule w/ Plastic 15 4 3 1 2 4 7 13

II-Base w/ Plastic 15 4 3 1 2 3 5 10

III-Rule w/o Plastic 15 4 3 2 2 3 6 10

IV-Base w/o Plastic 15 4 3 2 2 3 5 10

Interior

Floor

Interior

Sill

Interior

Exit

A Note that this variable was not applied to exterior data 
G-26 

Interior Floor Interior Sill 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Yes No Yes No

Figure G2.8a. Box Plots of Average Paint Lead Concentration by Analysis and Restricted 

Job 

Table G2.8a. Descriptive Summary of Average Paint Lead Concentration by Analysis and 

Restricted Job 

Analysis

Avg. Paint Lead 

Concentration (ppm) 

by Restricted Job

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-yes 23 4 3 1 2 3 6 10

2-no 24 4 3 1 2 3 7 13

1-yes 28 4 3 1 2 3 5 10

2-no 32 4 3 1 2 3 6 13

1-yes 28 4 3 1 2 3 5 10

2-no 32 4 3 1 2 3 6 13

Interior

Exit

Interior

Floor

Interior

Sill

A Note that this variable was not applied to exterior data 
G-27 

Interior Floor Interior Sill 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Tile Vinyl Tile Wood Tile Vinyl Tile Wood

Figure G2.9a. Box Plots of Average Paint Lead Concentration by Analysis and Work Room 

Floor Type 

Table G2.9a. Descriptive Summary of Average Paint Lead Concentration by Analysis and 

Work Room Floor Type 

Analysis

Avg. Paint Lead 

Concentration (ppm) 

by Floor Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Tile 17 4 3 1 2 2 7 13

Vinyl Tile 8 3 32 2 2 4 8

Wood 22 5 4 1 2 4 7 10

Tile 17 4 3 1 2 2 7 13

Vinyl Tile 21 3 3 1 2 3 4 8

Wood 22 5 4 1 2 4 7 10

Tile 17 4 3 1 2 2 7 13

Vinyl Tile 21 3 3 1 2 3 4 8

Wood 22 5 4 1 2 4 7 10

Interior

Exit

Interior

Floor

Interior

Sill

A Note that this variable was not applied to exterior data 
G-28 

Interior Floor Interior Sill 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Poor Fair Good Poor Fair Good

Figure G2.10a. Box Plots of Average Paint Lead Concentration by Analysis and Work 

Room Floor Condition 

Table G2.10a. Descriptive Summary of Average Paint Lead Concentration by Analysis and 

Work Room Floor Condition 

Analysis

Avg. Paint Lead 

Concentration (ppm) 

by Floor Condition

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Fair 10 2 2 1 1 2 3 4

Good 12 5 4 2 2 3 7 13

Poor 25 5 4 1 2 4 7 10

Fair 11 2 2 1 1 2 3 4

Good 22 4 3 1 2 3 5 13

Poor 27 5 4 1 2 4 7 10

Fair 11 2 2 1 1 2 3 4

Good 22 4 3 1 2 3 5 13

Poor 27 5 4 1 2 4 7 10

Interior

Sill

Interior

Exit

Interior

Floor

A Note that this variable was not applied to exterior data 
G-29 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Floor - Avg. Post-Work Workroom Floor Lead Loading (w/ Bulk) (R-Square = 5.62%)

10 100 1000 10000 100000 1000000 10000000

o o

o

o o

o

o

o

o

o

o

o

oo

o

oo

o

o

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o

o o

oo

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o

oo

o

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o

o

o

o

o

o

o

o

o

oo

o

oo

o

o

o

o

o

o

o

o

o

oo

oo

o

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Sill - Avg. Post-Work Workroom Floor Lead Loading (w/ Bulk) (R-Square = 5.62%)

10 100 1000 10000 100000 1000000 10000000

o o

o

o o

o

o

o

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o

o

o

oo

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o

o

o

oo

o

oo

o

o

o

o

o

o

o

o

o

oo

oo

o

Figure G2.11. Scatter Plots of Average Paint Lead Concentration and Average Post-Work 

Work Room Floor Dust Lead Loading for Interior Floors and Sills 
G-30 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Floor - Average Floor Dust Lead Loading at Clearance (R-Square = 1.82%)

1 10 100 1000

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

oo

o

oo

o

o

oo

o

o

o

o

o

o

oo

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Sill - Average Floor Dust Lead Loading at Clearance (R-Square = 1.82%)

1 10 100 1000

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

oo

o

oo

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o

o

oo

o

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

Figure G2.12. Scatter Plots of Average Paint Lead Concentration and Floor Dust Lead 

Loading at Clearance by Analysis for Interior Floors and Sills 
G-31 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Floor - Average Initial Soil Lead Loading (R-Square = 8.46%)

0 1000 2000 3000 4000 5000 6000

o

ooooo

o

oo

o

o

oooo

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o o o

oo o

o

o

o

o

o

o

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Sill - Average Initial Soil Lead Loading (R-Square = 8.46%)

0 1000 2000 3000 4000 5000 6000

o

ooooo

o

oo

o

o

oooo

o

oo

o

o

o

o

o

o

o

o

o

o

o

o

o

o o o

oo o

o

o

o

o

o

o

Avg. Paint Lead Concentration (ppm)

1

10

100

Exterior - Average Initial Soil Lead Loading (R-Square = 5.45%)

200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800

o

o

o

o

o

o

o

oo

o

o

o

Figure G2.13. Scatter Plots of Average Paint Lead Concentration by Analysis and Initial 

Average Soil Lead Concentration for Interior Floors, Interior Sills, and 

Exterior 
G-32 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Floor - Average Final Soil Lead Loading (R-Square = 11.42%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

ooooo

oo

o

o

o

o

o

o

o

o

o

o

o

o

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Sill - Average Final Soil Lead Loading (R-Square = 11.42%)

0 1000 2000 3000 4000 5000 6000 7000

o

o

o

o

o

oo

o

o

o

o

o

o

o

o

o

o

oo

o

o

o

o

ooooo

oo

o

o

o

o

o

o

o

o

o

o

o

o

Avg. Paint Lead Concentration (ppm)

1

10

100

Exterior - Average Final Soil Lead Loading (R-Square = 0.31%)

0 1000 2000 3000 4000 5000 6000

o

o

o

o

oo

o

o

o o

o o

Figure G2.14. Scatter Plots of Average Paint Lead Concentration by Analysis and Final 

Average Soil Lead Concentration for Interior Floors, Interior Sills, and 

Exterior 
G-33 

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Floor - Disturbed Area (Sq. Feet) (R-Square = 1.08%)

0 10 20 30 40 50 60 70 80 90 100 110

o

oo

o

o

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o

o

o

o

o

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oo

o

o

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oo

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o

o

o

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o

o

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o

o

o

oo

o

o

o

o

o

o

ooo

o

o

oo

o o

o

o

Avg. Paint Lead Concentration (ppm)

0.1

1.0

10.0

100.0

Sill - Disturbed Area (Sq. Feet) (R-Square = 1.08%)

0 10 20 30 40 50 60 70 80 90 100 110

o

oo

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o

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o

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o

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o

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o o

o

o

Avg. Paint Lead Concentration (ppm)

1

10

100

Exterior - Disturbed Area (Sq. Feet) (R-Square = 1.27%)

0 100 200 300

o

o

o

o o o

o

o o

o

oo

o o

o

Figure G2.15. Scatter Plots of Average Paint Lead Concentration by Analysis and 

Disturbed Area (ft2) for Interior Floors, Interior Sills, and Exterior 
G-34 

G3. Exploratory Summaries of Square Feet Disturbed vs. Select Categorical 

Characteristics 

Box plots of the square feet disturbed as well as descriptive statistical summary tables are 

presented in this section to illustrate and summarize the distribution of these factors as a function 

of select characteristics. Numerical summaries are presented for interior floor, sill and exit 

samples; all exterior samples are missing this information. Exit samples have been excluded 

from the graphical displays, which contain placeholders for the exterior samples. 

The selected characteristics are as follows: 

1. Job intensity 

2. City 

3. Job type 

4. Contractor 

5. Rule Plastic Use 

6. Cleaning Type 

7. Phase 

8. Restricted vs. non-restricted jobs 

9. Work room floor type 

10. Work room floor condition 

Scatter plots of the square feet disturbed are presented in this section to illustrate and summarize 

the distribution of these factors as a function of select characteristics. The fitted linear regression 

line (using untransformed data) is displayed in each plot along with its associated r-square value. 

The selected characteristics are as follows: 

11. Average Post-Work Work Room Floor Dust Lead Loading 

12. Floor Dust Lead Loading at Clearance 

13. Initial Average Soil Lead Concentration 

14. Final Average Soil Lead Concentration 

15. Average Paint Lead Concentration
G-35 

Interior Floor Interior Sill Exterior 

Disturbed Area (Sq. Ft)

0

100

200

300

LMH LMH LMH

Figure G3.1a. Box Plots of Square Feet Disturbed by Analysis and Job Intensity Level 

Table G3.1a. Descriptive Summary of Square Feet Disturbed by Analysis and Job 

Intensity Level 

Analysis

Disturbed Area (Sq. 

Ft) by Intensity

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 16 67 67 53 61 68 75 75

2-Medium 15 53 48 25 32 50 70 110

3-Low 16 9 8 6 6 8 10 18

1-High 20 63 62 34 58 66 75 75

2-Medium 20 54 49 25 36 50 68 110

3-Low 20 11 10 6 6 10 12 40

1-High 20 63 62 34 58 66 75 75

2-Medium 20 54 49 25 36 50 68 110

3-Low 20 11 10 6 6 10 12 40

1-High 5 82 75 30 80 98 100 100

2-Medium 5 133 120 75 90 100 150 250

3-Low 5 36 34 25 25 30 40 60

Interior

Exit

Interior

Floor

Interior

Sill

Exterior
G-36 

Interior Floor Interior Sill Exterior 

Disturbed Area (Sq. Ft)

0

100

200

300

OH PA OH PA OH PA

Figure G3.2a. Box Plots of Square Feet Disturbed by Analysis and City 

Table G3.2a. Descriptive Summary of Square Feet Disturbed by Analysis and City 

Analysis

Disturbed Area (Sq. 

Ft) by City

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Columbus, OH 36 42 29 6 9 40 74 110

Pittsburgh, PA 11 44 32 10 10 60 65 69

Columbus, OH 38 43 29 6 9 40 73 110

Pittsburgh, PA 22 43 34 10 14 48 65 72

Columbus, OH 38 43 29 6 9 40 73 110

Pittsburgh, PA 22 43 34 10 14 48 65 72

Columbus, OH 10 97 79 30 40 95 100 250

Pittsburgh, PA 5 58 49 25 25 60 80 98

Interior

Exit

Interior

Floor

Interior

Sill

Exterior
G-37 

Interior Floor Interior Sill Exterior 

Disturbed Area (Sq. Ft)

0

100

200

300

1 2 3* 4* 5 6* 7 1 2 3* 4* 5 6* 7 1 2 3 4 5 6 7 8

Figure G3.3a. Box Plots of Square Feet Disturbed by Analysis and Job Type 
G-38 

Table G3.3a. Descriptive Summary of Square Feet Disturbed by Analysis and Job Type 

Analysis

Disturbed Area (Sq. 

Ft) by Job Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

I1-Cut Outs 8 6 66 6 6 7 7

I2-Replace Windows 8 11 11 9 10 10 11 18

I3-Scrape Surface * 4 90 89 70 80 90 100 110

I4-Scrape Door * 7 33 33 25 26 32 40 40

I5-Heat gun < 1100° 4 50 50 50 50 50 50 50

I6-Heat gun > 1100° * 12 70 69 53 65 74 75 75

I7-Kitchen 4 61 60 55 58 61 64 66

I1-Cut Outs 12 11 9 6 6 7 14 40

I2-Replace Windows 8 11 11 9 10 10 11 18

I3-Scrape Surface * 8 78 76 60 65 71 90 110

I4-Scrape Door * 8 32 32 25 26 31 40 40

I5-Heat gun < 1100° 4 50 50 50 50 50 50 50

I6-Heat gun > 1100° * 12 70 69 53 65 74 75 75

I7-Kitchen 8 53 52 34 40 58 64 69

I1-Cut Outs 12 11 9 6 6 7 14 40

I2-Replace Windows 8 11 11 9 10 10 11 18

I3-Scrape Surface * 8 78 76 60 65 71 90 110

I4-Scrape Door * 8 32 32 25 26 31 40 40

I5-Heat gun < 1100° 4 50 50 50 50 50 50 50

I6-Heat gun > 1100° * 12 70 69 53 65 74 75 75

I7-Kitchen 8 53 52 34 40 58 64 69

E1-Door Replacement 2 25 25 25 25 25 25 25

E2-Replace Trim Soffit 2 50 49 40 40 50 60 60

E3-Rotopene 1 30 30 30 30 30 30 30

E4--Heat gun < 1100° 1 75 75 75 75 75 75 75

E5-Dry Scrape 4 148 136 90 95 125 200 250

E6-Power Sanding 2 100 100 100 100 100 100 100

E7-Torching 2 89 89 80 80 89 98 98

E8-Heat gun > 1100° * 1 30 30 30 30 30 30 30

Exterior

InteriorExit

InteriorFloor

InteriorSill

* Indicates job is restricted 
G-39 

Interior Floor Interior Sill Exterior 

Disturbed Area (Sq. Ft)

0

100

200

300

C2 C3 C4 C2 C3 C4 C1 C2 C3 C4

Figure G3.4a. Box Plots of Square Feet Disturbed by Analysis and Contractor 

Table G3.4a. Descriptive Summary of Square Feet Disturbed by Analysis and Contractor 

Analysis

Disturbed Area (Sq. 

Ft) by Contractor

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C2 20 58 42 6 50 72 75 110

C3 16 23 17 6 8 22 36 61

C4 11 44 32 10 10 60 65 69

C2 20 58 42 6 50 72 75 110

C3 18 26 19 6 9 26 40 69

C4 22 43 34 10 14 48 65 72

C2 20 58 42 6 50 72 75 110

C3 18 26 19 6 9 26 40 69

C4 22 43 34 10 14 48 65 72

C1 3 97 97 90 90 100 100 100

C2 4 44 41 30 30 35 58 75

C3 3 167 155 100 100 150 250 250

C4 5 58 49 25 25 60 80 98

Exterior

Interior

Sill

Interior

Exit

Interior

Floor
G-40 

Interior Floor Interior Sill 

Disturbed Area (Sq. Ft)

0

100

200

300

Yes No Yes No

Figure G3.5a. Box Plots of Square Feet Disturbed by Analysis and Rule Plastic Use 

Table G3.5a. Descriptive Summary of Square Feet Disturbed by Analysis and Rule Plastic 

Use 

Analysis

Disturbed Area (Sq. 

Ft) by Plastic

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-yes 24 43 31 6 11 50 66 90

2-no 23 42 28 6 9 40 70 110

1-yes 30 42 31 6 14 45 65 90

2-no 30 43 31 6 10 40 69 110

1-yes 30 42 31 6 14 45 65 90

2-no 30 43 31 6 10 40 69 110

Interior

Exit

Interior

Floor

Interior

Sill

A Note that this variable was not applied to exterior data
G-41 

Interior Floor Interior Sill 

Disturbed Area (Sq. Ft)

0

10

20

30

40

50

60

70

80

90

100

110

Rule Base Rule Base

Figure G3.6a. Box Plots of Square Feet Disturbed by Analysis and Cleaning Type 

Table G3.6a. Descriptive Summary of Square Feet Disturbed by Analysis and Cleaning 

Type 

Analysis

Disturbed Area (Sq. 

Ft) by Cleaning

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-rule 24 44 30 6 10 45 72 110

2-base 23 41 29 6 10 50 65 90

1-rule 30 44 31 6 11 40 66 110

2-base 30 42 30 6 13 45 65 90

1-rule 30 44 31 6 11 40 66 110

2-base 30 42 30 6 13 45 65 90

Interior

Exit

Interior

Floor

Interior

Sill

A Note that this variable was not applied to exterior data 
G-42 

Interior Floor Interior Sill 

Disturbed Area (Sq. Ft)

0

10

20

30

40

50

60

70

80

90

100

110

I II III IV I II III IV

Figure G3.7a. Box Plots of Square Feet Disturbed by Analysis and Phase 

Table G3.7a. Descriptive Summary of Square Feet Disturbed by Analysis and Phase 

Analysis

Disturbed Area (Sq. 

Ft) by Phase

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

I-Rule w/ Plastic 12 44 30 6 11 45 71 90

II-Base w/ Plastic 12 43 31 6 14 52 63 90

III-Rule w/o Plastic 12 45 30 6 10 45 72 110

IV-Base w/o Plastic 11 39 26 6 9 40 70 75

I-Rule w/ Plastic 15 43 31 6 11 40 66 90

II-Base w/ Plastic 15 42 31 6 14 50 65 90

III-Rule w/o Plastic 15 45 32 6 10 40 69 110

IV-Base w/o Plastic 15 41 29 6 10 40 69 75

I-Rule w/ Plastic 15 43 31 6 11 40 66 90

II-Base w/ Plastic 15 42 31 6 14 50 65 90

III-Rule w/o Plastic 15 45 32 6 10 40 69 110

IV-Base w/o Plastic 15 41 29 6 10 40 69 75

Interior

Floor

Interior

Sill

Interior

Exit

A Note that this variable was not applied to exterior data 
G-43 

Interior Floor Interior Sill 

Disturbed Area (Sq. Ft)

0

100

200

300

Yes No Yes No

Figure G3.8a. Box Plots of Square Feet Disturbed by Analysis and Restricted Job 

Table G3. 8a. Descriptive Summary of Square Feet Disturbed by Analysis and Restricted 

Job 

Analysis

Disturbed Area (Sq. 

Ft) by Restricted Job

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-yes 23 62 58 25 40 69 75 110

2-no 24 24 15 6 7 10 50 66

1-yes 28 61 57 25 40 65 75 110

2-no 32 26 18 6 8 14 50 69

1-yes 28 61 57 25 40 65 75 110

2-no 32 26 18 6 8 14 50 69

Interior

Exit

Interior

Floor

Interior

Sill

A Note that this variable was not applied to exterior data 
G-44 

Interior Floor Interior Sill 

Disturbed Area (Sq. Ft)

0

10

20

30

40

50

60

70

80

90

100

110

Tile Vinyl Tile Wood Tile Vinyl Tile Wood

Figure G3.9a. Box Plots of Square Feet Disturbed by Analysis and Work Room Floor Type 

Table G3. 9a. Descriptive Summary of Square Feet Disturbed by Analysis and Work Room 

Floor Type 

Analysis

Disturbed Area (Sq. 

Ft) by Floor Type

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Tile 17 38 25 6 6 50 61 75

Vinyl Tile 8 37 28 6 16 40 58 66

Wood 22 48 34 9 10 57 75 110

Tile 17 38 25 6 6 50 61 75

Vinyl Tile 21 40 33 6 25 40 60 72

Wood 22 48 34 9 10 57 75 110

Tile 17 38 25 6 6 50 61 75

Vinyl Tile 21 40 33 6 25 40 60 72

Wood 22 48 34 9 10 57 75 110

Interior

Sill

Interior

Exit

Interior

Floor

A Note that this variable was not applied to exterior data 
G-45 

Interior Floor Interior Sill 

Disturbed Area (Sq. Ft)

0

10

20

30

40

50

60

70

80

90

100

110

Poor Fair Good Poor Fair Good

Figure G3.10a. Box Plots of Square Feet Disturbed by Analysis and Work Room 

Floor Condition 

Table G3. 10a. Descriptive Summary of Square Feet Disturbed by Analysis and 

Work Room Floor Condition 

Analysis

Disturbed Area (Sq. 

Ft) by Floor Condition

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Fair 10 33 23 6 10 28 60 66

Good 12 44 28 6 6 50 74 75

Poor 25 46 33 6 11 40 70 110

Fair 11 34 24 6 10 31 60 66

Good 22 43 31 6 14 50 65 75

Poor 27 46 34 6 11 40 70 110

Fair 11 34 24 6 10 31 60 66

Good 22 43 31 6 14 50 65 75

Poor 27 46 34 6 11 40 70 110

Interior

Exit

Interior

Floor

Interior

Sill

A Note that this variable was not applied to exterior data 
G-46 

Disturbed Area (Sq. Ft)

0

10

20

30

40

50

60

70

80

90

100

110

Floor - Avg. Post-Work Workroom Floor Lead Loading (w/ Bulk) (R-Square = 27.73%)

10 100 1000 10000 100000 1000000 10000000

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Figure G3.11. Scatter Plots of Square Feet Disturbed and Average Post-Work Work Room 

Floor Dust Lead Loading for Interior Floors and Sills 
G-47 

Disturbed Area (Sq. Ft)

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Figure G3.12. Scatter Plots of Square Feet Disturbed and Floor Dust Lead Loading at 

Clearance by Analysis for Interior Floors and Sills 
G-48 

Disturbed Area (Sq. Ft)

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Figure G3.13. Scatter Plots of Square Feet Disturbed by Analysis and Initial Average Soil 

Lead Concentration for Interior Floors, Interior Sills, and Exterior 
G-49 

Disturbed Area (Sq. Ft)

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Figure G3.14. Scatter Plots of Square Feet Disturbed by Analysis and Final Average Soil 

Lead Concentration for Interior Floors, Interior Sills, and Exterior 
G-50 

Disturbed Area (Sq. Ft)

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Figure G3.15. Scatter Plots of Square Feet Disturbed by Analysis and Average Paint 

Concentration for Interior Floors, Interior Sills, and Exterior 
G-51 

APPENDIX H 

DETAILED DESCRIPTIVE ANALYSES OF INTERIOR 

HALLWAY DUST LEAD LOADINGS 

H-1 

H1. Distribution Check for Exit Dust Lead Loadings 

Distribution of Non-Detectable Floor Lead Measurements 

Measurements recorded at or below the detection limit were set to half that limit for this analysis. 

Table H1.1 summarizes the frequency for these measurements. 

Table H1.1. Summary of Exit Dust Lead Loading Measurements (μg/ft2) Below Detection 

Limit Measurements by Room and Stage 

Stage Exit 

Post-Verification 12 (8.9%)

Normality of the Exit Lead Measurement Distribution 

Prior to any analysis of the lead dust loadings, the underlying distribution of the response data 

was examined for normality. Note that a Wilkes-Shapiro p-value < 0.001 indicates a significant 

departure from normality. With larger sample sizes, normality tests can indicate statistically 

significant but unimportant departures from normality. For the data collected for this study, the 

log-transformation of the data was accepted even when the Wilkes-Shapiro statistics indicated 

non-normality. With additional time, potential outliers and other influential points could be 

explored to determine if other data adjustments would be beneficial to the analyses. 
H-2 

Figures H1.1a and H1.1b summarize the distribution of the raw and natural log-transformed exit 

dust lead measurements from the work room. 

300 900 1500 2100 2700 3300 3900 4500 5100

0

20

40

60

80

100

Percent

Lead Dust Loading (micrograms/sq ft)

Figure H1.1a. Histogram of Exit Dust Lead Loading Measurements (μg/ft2) (WilkesShapiro p-value < 0.001) 

2 2.8 3.6 4.4 5.2 6 6.8 7.6 8.4

0

2.5

5.0

7.5

10.0

12.5

15.0

17.5

20.0

Percent

Log-Transformed Lead Dust Loading (micrograms/sq ft)

Figure H1.1b. Histogram of Log Transformed Exit Dust Lead Loading Measurements 

(μg/ft2) (Wilkes-Shapiro p-value = 0.007)
H-3 

H2. Exploratory Summaries of Exit Dust Lead Dust Loadings vs. Select 

Categorical Characteristics 

Box plots of the exit dust lead loadings as well as descriptive statistical summary tables are 

presented in this section to illustrate and summarize the distribution of these factors as a function 

of select characteristics. Box plots are a technique for displaying one-dimensional data and their 

summary characteristics. A box plot displays the median (represented by the center horizontal 

line), the 25th percentile (represented by the bottom of the box), and the 75th percentile 

(represented by the top of the box). The vertical lines, or whiskers, are drawn from the box to 

the most extreme point within 1.5 * interquartile range. (An interquartile range is the distance 

between the 25th and the 75th percentiles.) Any value more extreme than this is identified 

individually with stars. The data are plotted using a log-base 10 scale. The summary statistics 

provided in the tables are sample size, arithmetic average, geometric average, minimum, 25th

percentile, median, 75th percentile, and maximum. 

The selected characteristics are as follows: 

54. Job intensity 

55. City 

56. Job type 

57. Contractor 

58. Housing unit 

59. Rule Plastic Use 

60. Cleaning Type 

61. Phase 

62. Restricted vs. non-restricted jobs 

63. Work room floor type 

64. Work room floor condition
H-4 

Exit Dust Lead Loading ( g/sq ft)

1

10

100

1000

10000

Low Medium High

Figure H2.1a. Box Plots of Exit Dust Lead Loading During Post-Verification by Job 

Intensity Level 

Table H2.1a. Descriptive Summary of Exit Dust Lead Loading During Post-Verification 

by Job Intensity Level 

Stage

Exit Room - Exit Dust 

(Intensity)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-High 48 212 62 5 9 81 321 1101

2-Medium 43 507 141 11 45 135 476 5287

3-Low 44 73 36 11 17 28 71 914

PostVerification
H-5 

Exit Dust Lead Loading ( g/sq ft)

1

10

100

1000

10000

1 2 3* 4* 5 6* 7

Figure H2.3a. Box Plots of Exit Dust Lead Loading During Post-Verification by Job Type 

Table H2.3a. Descriptive Summary of Exit Dust Lead Loading During Post-Verification 

by Job Type 

Stage

Exit Room - Exit Dust 

(Job Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

I1-Cut Outs 24 25 21 11 14 23 29 114

I2-Replace Window s 20 131 68 11 30 71 150 914

I3-Scrape Surface * 10 63 51 12 38 57 81 154

I4-Scrape Door * 21 969 500 75 230 476 952 5287

I5-Heat gun < 1100° 12 67 36 11 17 32 59 406

I6-Heat gun > 1100° * 36 267 83 5 9 162 402 1101

I7-Kitchen 12 47 26 5 9 37 52 217

PostVerification

* 

Indicates job is restricted 
H-6 

Exit Dust Lead Loading ( g/sq ft)

1

10

100

1000

10000

C2 C3 C4

Figure H2.4a. Box Plots of Exit Dust Lead Loading During Post-Verification by Contractor 

Table H2.4a. Descriptive Summary of Exit Dust Lead Loading During Post-Verification 

by Contractor 

Stage

Exit Room - Exit Dust 

(Contractor)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C2 58 72 34 5 13 31 89 415

C3 48 464 107 11 26 77 394 5287

C4 29 302 130 5 55 174 460 1101

PostVerification
H-7 

Exit Dust Lead Loading ( g/sq ft)

1

10

100

1000

10000

C1 3 8 9 10 16 17 31 32 33 36

Figure H2.5a. Box Plots of Exit Dust Lead Loading During Post-Verification by Housing 

Unit 

Table H2.5a. Descriptive Summary of Exit Dust Lead Loading During Post-Verification 

by Housing Unit 

Stage

Exit Room - Exit Dust 

(Housing Unit)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

C01 36 35 18 5 8 18 31 406

H03 10 63 51 12 38 57 81 154

H08 15 929 158 11 18 145 701 5287

H09 30 224 112 11 39 131 288 1156

H10 12 602 536 227 368 503 857 1101

H16 4 185 164 105 111 145 258 343

H17 4 93 84 55 60 75 127 168

H31 3 21 16 5 5 23 34 34

H32 0

H33 3 45 35 12 12 46 76 76

H35 15 260 90 11 27 42 310 1318

H36 3 76 18 5 5 5 217 217

PostVerification
H-8 

Exit Dust Lead Loading ( g/sq ft)

1

10

100

1000

10000

Yes No

Figure H2.6a. Box Plots of Exit Dust Lead Loading During Post-Verification by Rule 

Plastic Use 

Table H2.6a. Descriptive Summary of Exit Dust Lead Loading During Post-Verification 

by Rule Plastic Use 

Stage

Exit Room - Exit Dust 

(Plastic)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-yes 68 163 67 5 23 68 259 947

2-no 67 360 69 5 14 45 227 5287

PostVerification
H-9 

Exit Dust Lead Loading ( g/sq ft)

1

10

100

1000

10000

Rule Base

Figure H2.7a. Box Plots of Exit Dust Lead Loading During Post-Verification by Cleaning 

Type 

Table H2.7a. Descriptive Summary of Exit Dust Lead Loading During Post-Verification 

by Cleaning Type 

Stage

Exit Room - Exit Dust 

(Cleaning)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-rule 68 196 59 5 14 55 199 1318

2-base 67 327 78 5 23 59 289 5287

PostVerification
H-10 

Exit Dust Lead Loading ( g/sq ft)

1

10

100

1000

10000

I II III IV

Figure H2.8a. Box Plots of Exit Dust Lead Loading During Post-Verification by Phase 

Table H2.8a. Descriptive Summary of Exit Dust Lead Loading During Post-Verification 

by Phase 

Stage

Exit Room - Exit Dust 

(Phase)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

I-Rule w / Plastic 33 149 64 5 27 60 172 701

II-Base w / Plastic 35 176 69 5 23 79 297 947

III-Rule w /o Plastic 35 239 55 5 13 39 227 1318

IV-Base w /o Plastic 32 492 88 5 25 52 241 5287

PostVerification
H-11 

Exit Dust Lead Loading ( g/sq ft)

1

10

100

1000

10000

Yes No

Figure H2.9a. Box Plots of Exit Dust Lead Loading During Post-Verification by Restricted 

Job 

Table H2. 9a. Descriptive Summary of Exit Dust Lead Loading During Post-Verification 

by Restricted Job 

Stage

Exit Room - Exit Dust 

(Restricted Job)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

1-yes 67 457 136 5 45 181 484 5287

2-no 68 68 34 5 16 30 59 914

PostVerification
H-12 

Exit Dust Lead Loading ( g/sq ft)

1

10

100

1000

10000

Tile Vinyl Tile Wood

Figure H2.10a. Box Plots of Exit Dust Lead Loading During Post-Verification by 

Work Room Floor Type 

Table H2. 10a. Descriptive Summary of Exit Dust Lead Loading During PostVerification by Work Room Floor Type 

Stage

Exit Room - Exit Dust 

(Floor Type)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Tile 51 101 29 5 12 24 50 1318

Vinyl Tile 24 598 75 5 14 40 349 5287

Wood 60 261 135 11 57 134 344 1156

PostVerification
H-13 

Exit Dust Lead Loading ( g/sq ft)

1

10

100

1000

10000

Poor Fair Good

Figure H2.11a. Box Plots of Exit Dust Lead Loading During Post-Verification by 

Work Room Floor Condition 

Table H2.11a. Descriptive Summary of Exit Dust Lead Loading During Post-Verification 

by Work Room Floor Condition 

Stage

Exit Room - Exit Dust 

(Floor Condition)

Sample SizeArithmetic AverageGeometric AverageMinimum25th PercentileMedian75th PercentileMaximum

Poor 71 412 143 11 45 145 415 5287

Fair 28 168 56 5 23 44 193 1318

Good 36 35 18 5 8 18 31 406

PostVerification
H-14 

H3. Exploratory Summaries of Exit Dust Lead Dust Loadings vs. Select 

Continuous Characteristics 

Scatter plots of the exit dust lead loadings are presented in this section to illustrate and 

summarize the distribution of these factors as a function of select characteristics. The fitted 

linear regression line (using untransformed data) is displayed in each plot along with its 

associated r-square value. 

The selected characteristics are as follows: 

24. Paint Lead Concentration 

25. Floor Dust Lead Loading at Clearance 

26. Sill Dust Lead Loading at Clearance 

27. Initial Average Soil Lead Concentration 

28. Final Average Soil Lead Concentration 

29. Disturbed Area 

30. Avg. Floor Dust Lead (with Bulk) in Post-Work Work Room 
H-15 

Exit Dust (PV)

1

10

100

1000

10000

Average Paint Lead Concentration (ppm) (R-Square = 1.09%)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

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Figure H3.1. Scatter Plots of Exit Dust Lead Loading During Post-Verification by Average 

Paint Lead Concentration 

Exit Dust (PV)

1

10

100

1000

10000

Average Floor Dust Lead Loading at Clearance (R-Square = 0%)

1 10 100 1000

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Figure H3.2. Scatter Plots of Exit Dust Lead Loading During Post-Verification by Floor 

Dust Lead Loading at Clearance 
H-16 

Exit Dust (PV)

1

10

100

1000

10000

Average Sill Dust Lead Loading at Clearance (R-Square = 0.15%)

0.1 1.0 10.0 100.0 1000.0 10000.0

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Figure H3.3. Scatter Plots of Exit Dust Lead Loading During Post-Verification by Sill 

Dust Lead Loading at Clearance 

Exit Dust (PV)

10

100

1000

10000

Average Initial Soil Lead Loading (R-Square = 1%)

0 1000 2000 3000 4000 5000 6000

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Figure H3.4. Scatter Plots of Exit Dust Lead Loading During Post-Verification by Initial 

Average Soil Lead Concentration 
H-17 

Exit Dust (PV)

10

100

1000

10000

Average Final Soil Lead Loading (R-Square = 1.08%)

0 1000 2000 3000 4000 5000 6000 7000

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Figure H3.5. Scatter Plots of Exit Dust Lead Loading During Post-Verification by Final 

Average Soil Lead Concentration 

Exit Dust (PV)

1

10

100

1000

10000

Disturbed Area (Sq. Feet) (R-Square = 0.01%)

0 10 20 30 40 50 60 70 80 90 100 110

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Figure H3.6. Scatter Plots of Exit Dust Lead Loading During Post-Verification by 

Disturbed Area (ft2

) 
H-18 

Exit Dust (PV)

1

10

100

1000

10000

Avg. Floor Dust Lead in Post-Work Work Room (R-Square = 10.86%)

10 100 1000 10000 100000 1000000 10000000

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Figure H3.7. Scatter Plots of Exit Dust Lead Loading During Post-Verification by Avg. 

Floor Dust Lead (with Bulk) in Post-Work Work Room