4. The NITON XRF prompts the operator for four tests, each one on different regions of the 
wipe. The test stand and holder is configured to automatically position the wipe in four 
fixed positions. 
See Attached ASTM Method 1728-99. 
9. Sample Handling and Custody Requirements: 
The collected samples will immediately be placed in plastic bags for XRF analysis. These 
bags will be labeled with a unique sample identification number. Samples will be numbered 
as to the residence number and the specific sample location within the residence, (xxx-xx). 
Residences will be identified in numerical sequence, (i.e., 001- 350). Sample location num¬ 
bers will be as follows: 01 - principle play area floor, 02 - principle play area interior window 
sill, 03 - kitchen floor, 04 - kitchen window sill, 05 - kitchen window trough, 06 - youngest 
child’s room floor, 07 - youngest child’s room window sill, 08 - youngest child’s room window 
trough, 09 - floor of next youngest child’s room, and 10 - sill of next youngest child’s room. 
Sample numbers 11 and 12 are field blanks. (Note: One field blank will be analyzed for 
every 10 samples sent to the lab). After the XRF analysis is complete, the samples (still in 
the plastic bag) will be placed in a plastic centrifuge tube labeled with the same sample 
identification number as the plastic bag. All the centrifuge tubes a given residence will be 
placed in another plastic bag with the Chain of Custody (attached). The Chain of Custody 
shall be signed by the inspector and shipped via common carrier (i.e. Federal Express) to 
the contract laboratory. Samples that are not being sent to the laboratory for analysis will be 
held in the Syracuse Lead Division’s offices until the final reports are issued. Once the final 
reports are issued, the samples will be discarded. The XRF sample bags will be purchased 
from Niton Corporation. The centrifuge tubes will be provided by the laboratory and are pre¬ 
cleaned. 
10. Analytical Method Requirements: 
The laboratory will follow EPA Method SW846-3050 for the digestion of the samples and 
EPA Method SW846-7420 for the Atomic Absorption Spectrometry. Field sampling will be 
done with Niton Portable XRF using the manufacturer’s method. 
The detection limit, precision and accuracy of the AA are acceptable for this project, since 
the methods being used are the standard HUD/EPA methods for lead dust analysis. As 
part of this project, we plan to evaluate the detection limit, precision, and accuracy of the 
XRF by comparing it with the AA method, (see discussion in Section 2). Thus the XRF val¬ 
ues stated in the Table below are approximate. 
Sample Analyze/ Analytical 
Matrix Parameter Method 
Detection Estimated Estimate Action 
Limit Accuracy Precision Levels 
Dust wipe Lead (Pb)/Niton Niton 20 pg/ft 2 25% 
Dust wipe Lead (Pb)/AA EPA SW-846-7420 10 ug/ft 2 20% 
40±10pg/wipe floor 40pg/ft 2 
10±2ug/wipe sill 250 pg/ft 2 
well 400pg/ft 2 
11. Secondary Data (Non-Direct Measurement) Projects: Not Applicable 
12. Other Data Quality Indicators: 
The purpose of the laboratory analysis is to verify the XRF analysis. The laboratory will fol¬ 
low EPA Method SW846-3050 for the digestion of the samples and EPA Method SW846- 
QUALITY ASSURANCE PROJECT PLAN 
B 5 
