6. Noosa River DMP Ver0 (Combined)

Page                       : 22 of 25
Work Order                 : EB2201825
Client                     : BMT COMMERCIAL AUSTRALIA PTY LTD
Project                    : A10342 - Noosa SAP

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
pH field/fox                                                  EA003                  SOIL        In house: Referenced to Ahern et al 1998 - determined on a 1:5 soil/water extract designed to simulate field
                                                                                                 measured pH and pH after the extract has been oxidised with peroxide.
Chromium Suite for Acid Sulphate Soils                        EA033                  SOIL        In house: Referenced to Ahern et al 2004. This method covers the determination of Chromium Reducible Sulfur
                                                                                                 (SCR); pHKCl; titratable actual acidity (TAA); acid neutralising capacity by back titration (ANC); and net acid
                                                                                                 soluble sulfur (SNAS) which incorporates peroxide sulfur. It applies to soils and sediments (including sands)
                                                                                                 derived from coastal regions. Liming Rate is based on results for samples as submitted and incorporates a
                                                                                                 minimum safety factor of 1.5.
Moisture Content                                              EA055                  SOIL        In house: A gravimetric procedure based on weight loss over a 12 hour drying period at 105-110 degrees C.
                                                                                                 This method is compliant with NEPM Schedule B(3).
Particle Size Analysis by Hydrometer                         EA150H                  SOIL        Particle Size Analysis by Hydrometer according to AS1289.3.6.3
Soil Particle Density                                         EA152                  SOIL        Soil Particle Density by AS 1289.3.5.1: Methods of testing soils for engineering purposes - Soil classification
                                                                                                 tests - Determination of the soil particle density of a soil - Standard method
Total Fe and Al in Sediments by ICPAES                      EG005-SD                 SOIL        In house: Referenced to APHA 3120; USEPA SW 846 - 6010. Metals are determined following an appropriate
                                                                                                 acid digestion of the soil. The ICPAES technique ionises samples in a plasma, emitting a characteristic
                                                                                                 spectrum based on metals present. Intensities at selected wavelengths are compared against those of matrix
                                                                                                 matched standards. This method is compliant with NEPM Schedule B(3). LORs per NODG
Total Metals by ICP-AES                                      EG005T                  SOIL        In house: Referenced to APHA 3120; USEPA SW 846 - 6010. Metals are determined following an appropriate
                                                                                                 acid digestion of the soil. The ICPAES technique ionises samples in a plasma, emitting a characteristic
                                                                                                 spectrum based on metals present. Intensities at selected wavelengths are compared against those of matrix
                                                                                                 matched standards. This method is compliant with NEPM Schedule B(3)
Total Metals in Sediments by ICPMS                          EG020-SD                 SOIL        In house: Referenced to APHA 3125; USEPA SW846 - 6020, ALS QWI-EN/EG020. The ICPMS technique utilizes
                                                                                                 a highly efficient argon plasma to ionize selected elements. Ions are then passed into a high vacuum mass
                                                                                                 spectrometer, which separates the analytes based on their distinct mass to charge ratios prior to their
                                                                                                 measurement by a discrete dynode ion detector. Analyte list and LORs per NODG.
Total Mercury by FIMS (Low Level)                           EG035T-LL                SOIL        In house: Referenced to APHA 3112 Hg - B (Flow-injection (SnCl2)(Cold Vapour generation) AAS) FIM-AAS is an
                                                                                                 automated flameless atomic absorption technique. Mercury in solids are determined following an appropriate
                                                                                                 acid digestion. 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)
Nitrite as N - Soluble by Discrete                           EK057G                  SOIL        In house: Referenced to APHA 4500-NO3- B. Nitrite in a water extract is determined by direct colourimetry by
Analyser                                                                                         Discrete Analyser.
Nitrate as N - Soluble by Discrete                           EK058G                  SOIL        In house: Referenced to APHA 4500-NO3- F. Nitrate in the 1:5 soil:water extract is reduced to nitrite by way of a
Analyser                                                                                         chemical reduction followed by quantification by Discrete Analyser. Nitrite is determined seperately by direct
                                                                                                 colourimetry and result for Nitrate calculated as the difference between the two results.