Compiled Reference Document - MCU25/0020 (As Published)

Internal Quality Control Review and Glossary

General
1.   Laboratory QC results for Method Blanks, Duplicates, Matrix Spikes, and Laboratory Control Samples follow guidelines delineated in the National Environment Protection (Assessment of Site
     Contamination) Measure 1999, as amended May 2013. They are included in this QC report where applicable. Additional QC data may be available on request.
2.   Unless otherwise stated, all soil/sediment/solid results are reported on a dry weight basis.
3.   Unless otherwise stated, all biota/food results are reported on a wet weight basis on the edible portion.
4.   For CEC results where the sample's origin is unknown or environmentally contaminated, the results should be used advisedly.
5.   Actual LORs are matrix dependent. Quoted LORs may be raised where sample extracts are diluted due to interferences.
6.   Results are uncorrected for matrix spikes or surrogate recoveries except for PFAS compounds where annotated.
7.   SVOC analysis on waters is performed on homogenised, unfiltered samples unless noted otherwise.
8.   Samples were analysed on an 'as received' basis.
9.   Information identified in this report with blue colour indicates data provided by customers that may have an impact on the results.
10. This report replaces any interim results previously issued.

Holding Times
Please refer to the 'Sample Preservation and Container Guide' for holding times (QS3001).
For samples received on the last day of holding time, notification of testing requirements should have been received at least 6 hours before sample receipt deadlines as stated on the SRA.
If the Laboratory did not receive the information in the required timeframe, and despite any other integrity issues, suitably qualified results may still be reported.
Holding times apply from the sampling date; therefore, compliance with these may be outside the laboratory's control.
For VOCs containing vinyl chloride, styrene and 2-chloroethyl vinyl ether, the holding time is seven days; however, for all other VOCs, such as BTEX or C6-10 TRH, the holding time is 14 days.


Units
mg/kg: milligrams per kilogram                               mg/L: milligrams per litre                                           ppm: parts per million
µg/L: micrograms per litre                                   ppb: parts per billion                                               %: Percentage
org/100 mL: Organisms per 100 millilitres                    NTU: Nephelometric Turbidity Units                                   MPN/100 mL: Most Probable Number of organisms per 100 millilitres
CFU: Colony Forming Unit                                     Colour: Pt-Co Units (CU)

Terms
APHA                          American Public Health Association
CEC                           Cation Exchange Capacity
COC                           Chain of Custody
CP                            Client Parent - QC was performed on samples pertaining to this report
CRM                           Certified Reference Material (ISO17034) - reported as percent recovery.
Dry                           Where moisture has been determined on a solid sample, the result is expressed on a dry weight basis.
Duplicate                     A second piece of analysis from the same sample and reported in the same units as the result to show comparison.
LOR                           Limit of Reporting.
LCS                           Laboratory Control Sample - reported as percent recovery.
Method Blank                  In the case of solid samples, these are performed on laboratory-certified clean sands and in the case of water samples, these are performed on de-ionised water.
NCP                           Non-Client Parent - QC performed on samples not pertaining to this report, QC represents the sequence or batch that client samples were analysed within.
RPD                           Relative Percent Difference between two Duplicate pieces of analysis.
SPIKE                         Addition of the analyte to the sample and reported as percentage recovery.
SRA                           Sample Receipt Advice
Surr - Surrogate              The addition of a similar compound to the analyte target is reported as percentage recovery. See below for acceptance criteria.
TBTO                          Tributyltin oxide (bis-tributyltin oxide) - individual tributyltin compounds cannot be identified separately in the environment; however, free tributyltin was measured,
                              and its values were converted stoichiometrically into tributyltin oxide for comparison with regulatory limits.
TCLP                          Toxicity Characteristic Leaching Procedure
TEQ                           Toxic Equivalency Quotient or Total Equivalence
QSM                           US Department of Defense Quality Systems Manual Version 6.0
US EPA                        United States Environmental Protection Agency
WA DWER                       Sum of PFBA, PFPeA, PFHxA, PFHpA, PFOA, PFBS, PFHxS, PFOS, 6:2 FTSA, 8:2 FTSA


QC - Acceptance Criteria
The acceptance criteria should only be used as a guide and may be different when site-specific Sampling Analysis and Quality Plan (SAQP) have been implemented.
RPD Duplicates: Global RPD Duplicates Acceptance Criteria is ≤30%; however, the following acceptance guidelines are equally applicable:
         Results <10 times the LOR:                  No Limit
         Results between 10-20 times the LOR:        RPD must lie between 0-50%
         Results >20 times the LOR:                  RPD must lie between 0-30%
NOTE: pH duplicates are reported as a range, not as RPD
Surrogate Recoveries: Recoveries must lie between 20-130% for Speciated Phenols & 50-150% for PFAS. SVOCs recoveries 20 – 150%, VOC recoveries 50 – 150%
PFAS field samples containing surrogate recoveries above the QC limit designated in QSM 6.0, where no positive PFAS results have been reported or reviewed, and no data was affected.



QC Data General Comments
1.   Where a result is reported as less than (<), higher than the nominated LOR, this is due to either matrix interference, extract dilution required due to interferences or contaminant levels within
     the sample, high moisture content or insufficient sample provided.
2.   Duplicate data shown within this report that states the word "BATCH" is a Batch Duplicate from outside of your sample batch but within the laboratory sample batch at a 1:10 ratio. The Parent
     and Duplicate data shown are not data from your samples.
3.   pH and Free Chlorine analysed in the laboratory - Analysis on this test must begin within 30 minutes of sampling. Therefore, laboratory analysis is unlikely to be completed within holding
     time.Analysis will begin as soon as possible after sample receipt.
4.   Recovery Data (Spikes & Surrogates) - where chromatographic interference does not allow the determination of recovery, the term "INT" appears against that analyte.
5.   For Matrix Spikes and LCS results, a dash "-" in the report means that the specific analyte was not added to the QC sample.
6.   Duplicate RPDs are calculated from raw analytical data; thus, it is possible to have two sets of data.



                                                         Eurofins Environment Testing 1/21 Smallwood Place, Murarrie, QLD, Australia 4172                                              Page 12 of 15

     Date Reported: Feb 25, 2025                                              ABN : 50 005 085 521 Tel: +61 7 3902 4600                                                  Report Number: 1189604-S