EP 1110-1-29
31 Aug 01
Dust and soil samples shall be identified using unique sample numbers. Field and laboratory blanks and
spiked samples submitted to the laboratory for QA/QC purposes shall be numbered in such a way that
the sample identity will not be revealed to personnel conducting the analysis.
2.2.3.2
Sample Documentation
All single surface dust wipe samples collected, and the location of each, shall be documented in the field
on Form 2 (Figure C-2, Appendix C). All soil samples collected and the location of each, shall be
documented in the field on Form 3 (Figure C-3, Appendix C). The Forms documenting the samples
and sample locations shall be included as an attachment the to the Clearance Sampling Plan and
submitted as a part of the Lead Hazard Clearance Report.
2.2.3.3
Sample Chain-of-Custody
The Contractor shall follow a standard chain-of-custody protocol to ensure and document a continuous
record of sample possession from sample collection to receipt by the laboratory. The Contractor shall
complete and maintain chain-of-custody forms for each set of samples shipped to the laboratory, and a
copy of the forms shall accompany each shipment of samples. An example chain-of-custody form
(Figure C-4) is included in Appendix C.
The Contractor shall include copies of all chain-of-custody forms completed during the assessment in
the Clearance Report.
2.2.4
Decontamination
Field sampling equipment shall be decontaminated following the appropriate ASTM standard. At a
minimum, the field decontamination procedures for non-disposable sampling equipment (e.g., coring
devices) shall consist of either wiping the equipment off twice using a clean wet wipe each time, or
washing in a solution of non-phosphate detergent (e.g., Liquinox), and rinsing with distilled water. The
equipment shall be decontaminated prior to each use, between each sample, and prior to leaving the
site. Disposable latex gloves shall be discarded after each sample. Gloves need not be changed
between each sub-sample when collecting composite soil samples. The Contractor shall coordinate
with the installation environmental officer to determine requirements for the disposal of decontamination
waste and used personal protective equipment.
2.3
TASK 3 SAMPLE DATA ANALYSIS, EVALUATION OF FINDINGS
2.3.1
Sample Preparation and Analysis
Samples collected by the Contractor during the assessment(s) shall be sent to a laboratory recognized
under the NLLAP for analysis. The laboratory shall be accredited for each type of analysis required.
The Contractor shall verify the use of the following procedures by the Laboratory:
2.3.1.1
Dust Sample Preparation and Analysis
Dust samples shall be prepared for analysis following the ASTM Standard Practice for Hot Plate
Digestion of Dust Wipe Samples for the Determination of Lead by Atomic Spectrometry (E 1644)
or Standard Provisional Practice for Ultrasonic Extraction of Paint, Dust, Soil, and Air Samples
A-19
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