This document summarizes a site characterization workshop for soil remediation projects. The objectives of the site characterization were to identify different material types present, establish contaminant concentrations, and determine volumes of contaminated materials. Material types included soil, oil, sludge, and salt crust. The scope of work involved developing a site characterization plan, determining areas and volumes of materials, and the lateral and vertical extent of contamination. Samples were taken and analyzed for contaminants. Lessons learned included difficulties accurately characterizing oil depths and quantities due to variations. Future characterization will involve less intensive sampling focused on potential treatment technologies.

1. Soil Remediation Group
Lesson’s Learnt Workshop May 2018
Site Characterisation
www.kockw.com
Soil Remediation Projects I
Soil Remediation Group

2. Introduction
 Site Characterization
 Objectives
 Material Types
 Scope of Work
 Lab Analysis
 Data Management
 Reporting
 Lesson’s Learned/Recommendations

3. Objectives
 Objectives of Site Characterization
 The principle objectives of the Site Characterization and subsequent sampling of
the different features was to:
i) Identify the differing material types,
ii) Establish contaminant concentrations, and
iii) Determine volumes of differing contaminated materials anticipated to be
encountered.
 Material types to be characterized include:
 Soil
 Oil
 Sludge
 Salt Crust (where encountered)

4. Scope of Work
 General Scope
 The Contractor was required to provide the following information as per the
contract:
i) Site Characterization Plan
ii) The Area of the feature
iii) Volumes of the differing material types
iv) The lateral and vertical extent of the Contamination
v) The Physio-chemical properties of the differing material types
vi) The characteristics of any surface waters encountered
 All the above data was then to be compiled into a Site Characterization report

5. Scope of Work
GC-04 Effluent Pit
 Sampling Strategy
Oil
 1 Composite sample comprising 10
grabs per 500bbl
 Depth Samples taken by dips

6. Lesson Learned
 Due to depth variations it was not possible to accurately characterize the quantity
of oil

7. Scope of Work
Sludge
 1 Composite sample comprising 10
grabs per 500m2

8. Lesson Learned

9. Scope of Work
 Sampling Strategy
Soil/Sludge
 1 Composite sample comprising 10
grabs per 500m2
 Samples to be taken at stratigraphic
or contaminant changes
 Each location to be logged

10. Lesson Learned

11. Field Activities

12. Laboratory Analysis

13. Lessons Learnt
 Characterization analysis included PHC, fractionated PHC, PAHs, Metals,
SAR, EC, and nutrients; PAHs, metals and nutrients were found in
insignificant concentrations; characterization of contaminated materials at
storage hubs will be based on much less sampling density (e.g. 1 sample per
1,000 or 2,000 m3) and fewer analysis focusing on potential treatment
technologies (Total PHC on all samples, fractionated PHC, electrical
conductivity, PSD, pH and moisture content on 10%, SARA on 3% or 2.5% of
the samples);

14. Data Management

15. Reporting

16. Recommendations

17. 17
Thank you