REFERENCE DOCUMENTS - RAL25/0004 (As Published)

     Page                       : 8 of 9
     Work Order                 : EB2409053
     Client                     : ENVIRONMENTAL ADVISORS
     Project                    : 125 NSC LAKE McDONALD DVE, COOROY

     Brief Method Summaries
     The analytical procedures used by the Environmental Division have been developed from established internationally recognized procedures such as those published by the US EPA, APHA, AS and NEPM. In house
     developed procedures are employed in the absence of documented standards or by client request. The following report provides brief descriptions of the analytical procedures employed for results reported in the
     Certificate of Analysis. Sources from which ALS methods have been developed are provided within the Method Descriptions.
     Analytical Methods                                            Method                Matrix       Method Descriptions
     Total Dissolved Solids (High Level)                          EA015H                WATER         In house: Referenced to APHA 2540C. A gravimetric procedure that determines the amount of `filterable` residue
                                                                                                      in an aqueous sample. A well-mixed sample is filtered through a glass fibre filter (1.2um). The filtrate is
                                                                                                      evaporated to dryness and dried to constant weight at 180+/-5C. This method is compliant with NEPM Schedule
                                                                                                      B(3)
     Dissolved Mercury by FIMS - Low Level                       EG035F-LL              WATER         In house: Referenced to APHA 3112 Hg - B (Flow-injection (SnCl2)(Cold Vapour generation) AAS) Samples are
                                                                                                      0.45µm filtered prior to analysis. FIM-AAS is an automated flameless atomic absorption technique. A
                                                                                                      bromate/bromide reagent is used to oxidise any organic mercury compounds in the filtered sample. The ionic
                                                                                                      mercury is reduced online to atomic mercury vapour by SnCl2 which is then purged into a heated quartz cell.
                                                                                                      Quantification is by comparing absorbance against a calibration curve. This method is compliant with NEPM
                                                                                                      Schedule B(3).
     Dissolved Metals in Fresh Water -Suite                      EG094A-F               WATER         In house: Referenced to APHA 3125; USEPA SW846 - 6020 Samples are 0.45µm filtered prior to analysis. The
     A by ORC-ICPMS                                                                                   ORC-ICPMS technique removes interfering species through a series of chemical reactions prior to ion detection.
                                                                                                      Ions are passed into a high vacuum mass spectrometer, which separates the analytes based on their distinct
                                                                                                      mass to charge ratios prior to measurement by a discrete dynode ion detector. This method is compliant with
                                                                                                      NEPM Schedule B(3).
     TRH - Total Recoverable Hydrocarbons -                      EP071SG                WATER         In house: Referenced to USEPA SW 846 - 8015 Sample extracts are analysed by Capillary GC/FID and
     Silica Gel Cleanup                                                                               quantified against alkane standards over the range C10 - C36. This method is compliant with NEPM Schedule
                                                                                                      B(3).
     Semivolatile Organic Compounds                                EP075                WATER         In house: Referenced to USEPA SW 846 - 8270 Sample extracts are analysed by Capillary GC/MS and
                                                                                                      quantification is by comparison against an established 5 point calibration curve. This method is compliant with
                                                                                                      NEPM Schedule B(3)
     PAH/Phenols (GC/MS - SIM)                                  EP075(SIM)              WATER         In house: Referenced to USEPA SW 846 - 8270 Sample extracts are analysed by Capillary GC/MS in SIM Mode
                                                                                                      and quantification is by comparison against an established 5 point calibration curve. This method is compliant
                                                                                                      with NEPM Schedule B(3)
     TRH Volatiles/BTEX                                            EP080                WATER         In house: Referenced to USEPA SW 846 - 8260 Water samples are directly purged prior to analysis by Capillary
                                                                                                      GC/MS and quantification is by comparison against an established 5 point calibration curve. Alternatively, a
                                                                                                      sample is equilibrated in a headspace vial and a portion of the headspace determined by GCMS analysis. This
                                                                                                      method is compliant with the QC requirements of NEPM Schedule B(3)
     Per- and Polyfluoroalkyl Substances                         EP231X-LL              WATER         In-house: Analysis of fresh and saline waters by Solid Phase Extraction (SPE) followed by
     (PFAS by LCMSMS                                                                                  LC-Electrospray-MS-MS, Negative Mode using MRM and internal standard quantitation.
                                                                                                      Isotopically labelled analogues of target analytes used as internal standards and surrogates are added to the
                                                                                                      sample container. The entire contents are transferred to a solid phase extraction (SPE) cartridge. The sample
                                                                                                      container is successively rinsed with aliquots of the elution solvent. The eluted extract is concentrated,
                                                                                                      combined with an equal volume of reagent water and filtered for analysis. Method procedures and data quality
                                                                                                      objectives conform to US DoD QSM 5.4, table B-15 requirements.
     Preparation Methods                                           Method                Matrix       Method Descriptions

Document Set ID: 23717062
Version: 0, Version Date: 01/01/1900