ty owners will be notified. All participants will be trained in dust control methods and will be 
informed of the HEPA-VAC loaner program. 
If it were necessary to change this QAPP, Terry Bourbon and Betsy Mokrzycki would deter¬ 
mine what changes were necessary. Changes would be documented in writing and sent to 
the distribution list in section 1. 
This sampling scheme is designed to be flexible and will be adjusted, as needed depending 
on the correlation of the statistical analyses. All samples will be analyzed using the 
portable XRF. To evaluate the data, some samples will be sent to the lab for confirmation by 
atomic adsorption spectroscopy (AA). A two phase process will be used. Phase I will con¬ 
sist of 100% confirmatory testing for the first 12 homes. This will yield approximately 120 
samples including field blanks. The XRF data will be forwarded to the laboratory so that a 
statistical analysis can be performed. The laboratory will be required to perform an appro¬ 
priate statistical comparison between the XRF and AA values for the three sets of samples 
in phase 1 (floor, sill and well). 
Phase 1 of our sampling scheme has been completed. Based on our review of the XRF 
and laboratory data from phase 1, (see attachment 8), we have revised our sampling and 
analysis scheme to require confirmation analysis as follows: 
Sample Type 
XRF Reading 
Lab Confirmation? 
Floor 
40 pg./ft 2 
Yes 
Floor 
>40 pg/ft 2 
No 
Window Sill 
<100 pg/ft 2 
No 
Window Sill 
100 pg/ft 2 and 250 pg/ft 2 
Yes 
Window Sill 
> 250 pg/ft 2 
No 
Window Well 
<180 pg/ft 2 
No 
Window Well 
180 pg/ft 2 and 400 pg/ft 2 
Yes 
Window Well 
>400 pg/ft 2 
No 
In addition to the confirmation analysis described in the Table above, we will also confirm 
10% of the XRF data that is within the acceptable ranges, (i.e., XRF readings that would not 
automatically require lab confirmation). 
The XRF analysis will be made available to the program participants in a written report. 
When lab confirmation is required, lab results will replace the XRF results in the written 
report. Post- intervention sampling will be conducted in 10% of the participating residences. 
Post- intervention sampling will be conducted exactly as the pre-intervention sampling 
described above, once the training and HEPA/Loaner aspects of the project have been in- 
place at the property for approximately one week. Post intervention sample collection will 
use the same numbering scheme as the pre-intervention sampling, only the starting number 
will be 13, (i.e., principle play area - 13, principle play area interior window sill - 14, etc). In 
addition, two field blank samples will also be submitted. These will be samples 23 and 24. 
s 2 
Appendix B 
