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Data Verification Report for Package 4420

Data Validation Summary Report

Introduction

The following data validation summary report covers environmental soil samples and associated field quality control (QC) samples collected from Camp Stanley Storage Activity (CSSA) during the period January 10 and 11, 2000 for the Area of Concern (AOC) investigation.  The samples were analyzed for a reduced list of volatile organic compounds (VOCs), which included 1,1-dichloroethene, cis-1,2-dichloroethene, trans-1,2-dichloroethene, tetrachloroethene and trichloroethene.  The samples were assigned to the following laboratory Sample Delivery Group (SDG):

Field quality control samples collected were trip blanks; equipment blanks; matrix spike/matrix spike duplicates (MS/MSD); and field duplicates. All field quality control samples were analyzed for VOCs.

All samples were collected by Parsons Engineering Science (Parsons ES).  All analyses were performed by O�Brien & Gere Laboratories, Inc. following procedures outlined in the AFCEE QAPP, version 3.0.

Evaluation Criteria

The data submitted by the laboratory has been reviewed and validated following the guidelines outlined in the AFCEE QAPP, version 3.0.  Information reviewed in the data packages include sample results; the summary of laboratory quality control results; case narrative; raw data; and chain-of-custody forms.  The analyses and findings presented in this report are based on the reviewed information, and whether the guidelines in the AFCEE QAPP were met. 

Volatiles

General

This SDG consisted of fourteen (14) samples, including twelve (12) environmental soil samples, one field duplicate soil sample and one trip blank sample.  The samples were collected on January 10 and 11, 2000 and analyzed for VOCs.

The VOC analyses were performed using United States Environmental Protection Agency (USEPA) SW846 Method 8260B.  Except where indicated in this report, all samples for this SDG were analyzed following the procedures outlined in the AFCEE QAPP.  All samples collected were prepared and analyzed within the holding times required by the method.

Accuracy Results

Accuracy was evaluated using the %R results for the MS/MSD samples; LCS samples; and surrogate spikes.

All LCS and surrogate %Rs were within acceptance criteria. Sample AOC38-SS15 (1.5-2.0) collected on January 12, 2000 from the same site was used as the parent sample for MS and MSD analyses. (This has been approved by Mr. Edward Brown of AFCEE.) All %R were within acceptance criteria for MS/MSD.

Precision Results

Precision was evaluated using the Relative Percent Difference (RPD) obtained from MS/MSD results; and the field duplicate analyte values. Sample AOC38-SS100 (1.5-2.0) was the field duplicate of sample AOC38-SS02 (1.5-2.0). Sample 38-SS15 (1.5-2.0) was used as the MS/MSD sample.

All MS/MSD, field duplicate RPDs were within acceptance criteria.

Completeness

Completeness has been evaluated by comparing the total number of samples collected with the total number of samples with valid analytical data. 

All results for the samples in this SDG were usable.  The completeness for this SDG is 100.0% compared to the minimum acceptance limit of 90%.

Representativeness

Representativeness expresses the degree to which sample data accurately and precisely represents actual site conditions.  Representativeness has been evaluated by:

Comparing the chain-of-custody procedures to those described in the AFCEE QAPP;

All samples in this SDG were analyzed following the chain-of-custody (COC) and analytical procedures described in the AFCEE QAPP. All samples were prepared and analyzed within the holding time required by the method.

There was one method blank and one trip blank associated with the VOC analyses in this SDG.  All blanks were free of VOCs above the RL.