EP 1110-1-31
31 Aug 01
Paint Hazards in Housing, June 1995. (Chapter 7 revised 1997)". If the PCS of the XRF
spectrum analyzer manufacturer requires additional or more stringent warm up, quality control,
or calibration check instructions than those described in the HUD Guidelines, they shall be
followed. Calibration shall also be performed before and after turning the instrument on or off
throughout the inspection work (e.g., lunch breaks, changing batteries). If the failed calibration
results occur at the end of a t esting period, the results obtained during that testing period shall be
discarded and the unit re-tested. The lead inspector/risk assessor shall record all calibration
check results and submit this record in the Contractor Data Certification section of the Lead
Inspection/Risk Assessment Report.
Validation shall be accomplished with the lead inspector/risk assessor randomly selecting 10
testing combinations for retesting in the surveyed units for every 10 units tested. The retesting
shall be with the same XRF spectrum analyzer. The average of the 10 XRF retest results shall
not vary from the 10 original XRF results by more than the retest tolerance limit that is
calculated as specified on the XRF PCS sheet. If the limit is exceeded, the procedure shall be
repeated using 10 different testing combinations. If the retest tolerance is exceeded again, the
original inspection is considered invalid. This process must be documented in the Contractor
Data Certification section of the Lead Inspection/Risk Assessment Report.
2.3.3.2
Field Blank Dust Wipe QA Samples
Field blanks for single wipe sampling shall be collected in accordance with ASTM's Standard
Practice for Field Collection of Settled Dust Samples Using Wipe Sampling Methods for Lead
Determination b y Atomic Spectrometry Techniques (E 1728), using wipe materials meeting the
requirements of Standard Specification for Wipe Sampling Materials for Lead in Surface Dust
(E 1792) using the same wipe material used to collect the field wipe samples. There shall be no
indication to the laboratory, by sample identification numbers or other means, that the field blank
samples are QA samples.
2.3.3.3
Field Spike Dust Wipe QA Samples
******************************************************************************
NOTE: The AIHA produces the most reliable spiked lead samples that are commercially
available and are specified over all other sources if commercial spikes are purchased, since the
AIHA prepared spiked samples are used in the Environmental Lead Proficiency Analytical
Testing (ELPAT) certification program. The AIHA stock samples are obtained through the
AIHA.
AIHA
2700 Prosperity Road
Fairfax, Virginia 22031
(703) 849-8888 (voice)
(703) 207-3561 (fax)
http://www.aiha.org/fees.html/
A-25
Previous Page
