RESPONSE TO FURTHER ADVICE -Geotechnical Report · MCU25/0054

Page                       : 2 of 3
Work Order                 : EB2510288
Client                     : PTG Consulting Pty Ltd
Project                    : PTG/02023 William Street Noosaville

General Comments
The analytical procedures used by ALS have been developed from established internationally recognised procedures such as those published by the USEPA, APHA, AS and NEPM.                                In house developed procedures
are fully validated and are often at the client request.
Where moisture determination has been performed, results are reported on a dry weight basis.
Where a reported less than (<) result is higher than the LOR, this may be due to primary sample extract /digestate dilution and/or insufficient sample for analysis. Where the LOR of a reported result differs from
standard LOR, this may be due to high moisture content, insufficient sample (reduced weight employed) or matrix interference.
Key :          Anonymous = Refers to samples which are not specifically part of this work order but formed part of the QC process lot
               CAS Number = CAS registry number from database maintained by Chemical Abstracts Services. The Chemical Abstracts Service is a division of the American Chemical Society.
               LOR = Limit of reporting
               RPD = Relative Percentage Difference
               # = Indicates failed QC
Laboratory Duplicate (DUP) Report
The quality control term Laboratory Duplicate refers to a randomly selected intralaboratory split. Laboratory duplicates provide information regarding method precision and sample heterogeneity. The permitted ranges
for the Relative Percent Deviation (RPD) of Laboratory Duplicates are specified in ALS Method QWI -EN/38 and are dependent on the magnitude of results in comparison to the level of reporting: Result < 10 times LOR:
No Limit; Result between 10 and 20 times LOR: 0% - 50%; Result > 20 times LOR: 0% - 20%.
Sub-Matrix: SOIL                                                                                                                                                     Laboratory Duplicate (DUP) Report
 Laboratory sample ID    Sample ID                       Method: Compound                                          CAS Number        LOR            Unit        Original Result    Duplicate Result      RPD (%)    Acceptable RPD (%)

EA003 :pH (field/fox) (QC Lot: 6484308)
 EB2510288-001           BH2 0-0.25                      EA003: pH (F)                                                      ----     0.1          pH Unit            6.9                  7.0              0.0          0% - 20%
                                                         EA003: pH (Fox)                                                    ----     0.1          pH Unit            2.9                  3.1              4.3          0% - 20%
 EB2510288-011           BH3 0.5-0.75                    EA003: pH (F)                                                      ----     0.1          pH Unit            6.1                  6.1              0.0          0% - 20%
                                                         EA003: pH (Fox)                                                    ----     0.1          pH Unit            2.9                  2.8              0.0          0% - 20%