Quality Assurance Project Plan Including Sampling And Analysis Plan Page 41
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67Hunters Point Shipyard Parcel F ESTCP Demonstration Plan
Appendix A: Quality Assurance Project Plan
A.3.4.4.2 Tissue Lipids
If archived tissue sample splits will be analyzed, lipid concentrations will be determined for each sample.
The lipid concentration of each tissue sample will be determined from the dichloromethane sample extract
prepared during the PCB compounds extraction according to BDO SOP 5-190. A 10-mL aliquot of
unconcentrated extract is air-dried to determine the DCM extractable lipid concentration.
A.3.4.4.3 Percent Moisture
If archived tissue sample splits will be analyzed, percent moisture will be determined by BDO to
determine the amount of water present in sample aliquots. Percent moisture is determined by drying a
well-homogenized aliquot of tissue sample. Percent moisture will be determined as the percent ratio of
wet to dry weight for each analytical aliquot and applied to the data generated at each laboratory. Dry
weights at BDO are performed using dry heat.
A.3.4.5
General Requirements
Each laboratory performing analyses for the ESTCP DP must comply with the training requirements
defined in Sections A.2.6.1 and A.2.6.2. The BDO laboratory must also comply with the specific
certification requirements defined in Sections A.2.6.3 and A.2.6.4.
A laboratory batch is defined as a group of ≤20 field samples of a similar matrix that is processed as a
unit with the same reagents and solvents, simultaneously with the required QC samples, and analyzed in
the same method sequence. A procedural blank must be analyzed in each analytical sequence. For the
purposes of this study, all sediments are considered a “similar” matrix. Critical data will not be surrogate-
corrected and no data will be blank-corrected.
Analytical failures must be assessed and corrected. In most cases an analytical failure will stop the flow of
work until it is reviewed, the root cause is identified, and corrective action is implemented. Most
analytical failures are associated with QC results or instrument performance. Corrective action for these
areas is addressed in Section A.4.1. Any deviations from the approved methods must be documented and
discussed in the report narrative.
Spent samples, solvent, and acid waste will be discarded in the appropriate waste stream according to
SOPs and the sample custody requirements defined in Section A.3.3.5.
A.3.5
Quality Control Requirements
A.3.5.1
Field Quality Control
This section describes the use of cooler blanks and field duplicates in this study.
Cooler Blanks. A cooler (temperature) blank will be placed in a cooler so that the temperature of
each cooler can be measured accurately upon receipt at the laboratory without compromising
sample integrity. Thus, the cooler blank is a surrogate sample: the cooler blank for water samples
is deionized water, and the cooler blank for sediment samples is a solid matrix (e.g., soil, sodium
sulfate). The container type for the cooler blank is not critical, but should be approximately the
same size as the sample containers. Cooler blanks lids should be clearly labeled so that laboratory
sample custodians will recognize and use them to measure temperatures upon receipt. Cooler
blanks are not assigned a unique field sample identification number.
Page A-
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