Quality Assurance Project Plan Including Sampling And Analysis Plan (Page 19 of 67) in pdf

Hunters Point Shipyard Parcel F ESTCP Demonstration Plan

Appendix A: Quality Assurance Project Plan

A.2.4.2 Assessment of Reductions in Aqueous PCB Availability and PCB Bioaccumulation

To determine that the AC treatments lead to a reduction in aqueous PCB availability and PCB

bioaccumulation, the following assessments will be completed during the course of the ESTCP DP

project:

a) PCB bioaccumulation in test clams and indigenous amphipods retrieved from plots (ERDC),

b) AC treatment effects on indigenous benthic community structure (ERDC), and

c) in situ PCB stabilization using physicochemical tests of PCB availability (Stanford/UMBC).

Further details of these field sampling and analysis methods associated with the above assessments are

provided in Sections A.3.2 through A.3.5.

A.2.4.3

Assessment of Resuspension Potential

The overlying water above the five plots will be sampled during high tide once before and thrice after

treatments to evaluate possible sediment and PCB resuspension and measure suspended and dissolved

PCB concentrations. The sampling and analysis methods associated with this assessment are provided in

Sections A.3.2 through A.3.5.

A.2.5

Quality Objectives and Criteria

A.2.5.1

Data Quality Objectives

The development of the DQOs for the ESTCP DP followed U.S. EPA’s Guidance for the Data Quality

Objectives Process (U.S. EPA QA/G-4, 2000b). The DQOs have been divided into two categories that

relate to those defined in the ESTCP DP. The DQOs for primary quantitative performance criteria are

defined in Table A-2; the DQOs for secondary performance criteria are defined in Table A-3. Table A-4

defines the measurements that will be completed to assess the primary performance criteria and secondary

performance for the ESTCP DP. Measurements that will be done by BDO on the archived sample splits

and will produce critical data for the Navy are identified Table A-4.

A.2.5.2

Measurement Quality Objectives

Measurement quality objectives for critical analyses conducted for this study can be expressed in terms of

accuracy, precision, completeness, and sensitivity goals. Accuracy and precision are monitored through

the analysis of QC samples (Section A.3.5). Completeness is a calculated value. Sensitivity is monitored

through instrument calibration (Section A.3.7) and the determination of method detection limits (MDLs)

and reporting limits (Section A.2.5.2). Qualitative quality objectives, expressed in terms of comparability

and representativeness, are addressed as part of the sampling design.

Accuracy is defined as the degree of agreement between an observed value and an accepted

reference value. Accuracy includes a combination of random error (precision) and systematic

error (bias) components that are due to sampling and analytical operations.

Precision is defined as degree to which a set of observations or measurements of the same

property, obtained under similar conditions, conform to themselves. Precision is usually

expressed as standard deviation, variance, or range, in either absolute or relative terms.

Completeness is the amount of data collected as compared to the amount needed to ensure that

the uncertainty or error is within acceptable limits. The goal for data completeness is 100%.

Page A-

of A-67

Quality Assurance Project Plan Including Sampling And Analysis Plan Page 19

Related Articles

Related forms

Related Categories