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[Volume 2 Index]

Second Revision, Evaluation of Background Metals Concentrations in Soils and Bedrock at CSSA - February 2002

Table of Contents

Section 1 - Introduction

1.1   Purpose of Report

1.2   Project Authorization

1.3   Regulatory Basis

1.4   Objectives and Scope

Section 2 - Methodology

2.1   Overview

2.2   Background Sample Sets

2.3   Sampling Procedures

2.3.1   Sample Handling Procedures

2.3.2   Decontamination

2.3.3    Laboratory Analysis

2.3.3.1   Analytical Methods

2.3.3.2   Detection Limits

2.3.4   Quality Assurance/Quality Control

2.3.5   Data Verification and Validation

2.4   Statistical Evaluation

2.4.1   Statistical Approach

2.4.2   Procedures for Non-Detects

2.4.3   Adjustment of Sample Mean and Standard Deviation

2.4.3.1   Censored Probability Plots

2.4.3.2   Detects Only Probability Plot

Section 3 - Results and Conclusions

Section 4 - References

Appendices

Appendix A   Glen Rose Statistics Tables

Table 1 - Table 2 - Table 3 - Table 4 - Table 5

Appendix B   All Soils Statistics Tables

Table 1 - Table 2 - Table 3 - Table 4 - Table 5 - Table 6 - Table 7

Appendix C   Investigation of Statistical Assumptions for Pooling the Data

Table 1 - Table 2 - Table 3 - Table 4 - Table 5 - Table 6 - Table 7 - Table 8 - Table 9

Appendix D   Statistical Analysis Regarding High Lead Concentration

Appendix E   Data Package for pH Analyses

Pages: 1-6    7-11    12-17    18-21    22-26

Figures

Figure 2.1   Background Sampling Locations

Tables

Table 2.1   Summary of Background Sample Collection

Table 2.2   Laboratory Analytical Methods, Detection Limits, and Regulatory Criteria Camp Stanley Storage Activity, Texas

Table 3.1   Summary of Background Glen Rose Formation Analytical Results

Table 3.2   Summary of Background Surface Soil Analytical Results

Table 3.3   Summary of Glen Rose and All Soils UTL Calculation

Table 3.4   Soil pH Levels