REFERENCE DOCUMENTS - RAL25/0004 (As Published)

     Page                          : 2 of 6
     Work Order                    : EB2307800
     Client                        : ENVIRONMENTAL ADVISORS
     Project                       : 125 NSC LAKE McDONALD DVE, COOROY

     Outliers : Quality Control Samples
     Duplicates, Method Blanks, Laboratory Control Samples and Matrix Spikes
      Matrix: SOIL
       Compound Group Name                                 Laboratory Sample ID   Client Sample ID     Analyte                                  CAS Number      Data            Limits      Comment
     Matrix Spike (MS) Recoveries
      EG048: Hexavalent Chromium (Alkaline Digest)         EB2307718--001         Anonymous            Hexavalent Chromium                  18540-29-9        24.6 %          70.0-130%     Recovery less than lower data quality
                                                                                                                                                                                            objective
       EG048: Hexavalent Chromium (Alkaline Digest)        EB2307718--001         Anonymous            Hexavalent Chromium                  18540-29-9         2.9 %          70.0-130%     Recovery less than lower data quality
                                                                                                                                                                                            objective

     Outliers : Analysis Holding Time Compliance
     Matrix: SOIL
     Method                                                                                                                                        Extraction / Preparation                                     Analysis
      Container / Client Sample ID(s)                                                                                               Date extracted     Due for extraction       Days          Date analysed   Due for analysis       Days
                                                                                                                                                                               overdue                                              overdue
     EA055: Moisture Content (Dried @ 105-110°C)
      Soil Glass Jar - Unpreserved
       TP10-0.5                                                                                                                          ----                  ----               ----        16-Mar-2023      10-Mar-2023            6

     Analysis Holding Time Compliance
     If samples are identified below as having been analysed or extracted outside of recommended holding times, this should be taken into consideration when interpreting results.
     This report summarizes extraction / preparation and analysis times and compares each with ALS recommended holding times (referencing USEPA SW 846, APHA, AS and NEPM) based on the sample container
     provided. Dates reported represent first date of extraction or analysis and preclude subsequent dilutions and reruns. A listing of breaches (if any) is provided herein.
     Holding time for leachate methods (e.g. TCLP) vary according to the analytes reported. Assessment compares the leach date with the shortest analyte holding time for the equivalent soil method. These are:                      organics
     14 days, mercury 28 days & other metals 180 days. A recorded breach does not guarantee a breach for all non-volatile parameters.
     Holding times for VOC in soils vary according to analytes of interest. Vinyl Chloride and Styrene holding time is 7 days; others 14 days.       A recorded breach does not guarantee a breach for all VOC analytes and
     should be verified in case the reported breach is a false positive or Vinyl Chloride and Styrene are not key analytes of interest/concern.
     Matrix: SOIL                                                                                                                                                               Evaluation: û = Holding time breach ; ü = Within holding time.
     Method                                                                                                          Sample Date                   Extraction / Preparation                                     Analysis
      Container / Client Sample ID(s)                                                                                               Date extracted     Due for extraction      Evaluation     Date analysed   Due for analysis    Evaluation

      EA055: Moisture Content (Dried @ 105-110°C)
     Soil Glass Jar - Unpreserved (EA055)
                                                                                                                                                               ----               ----                         10-Mar-2023
        TP10-0.5                                                                                                    24-Feb-2023          ----                                                 16-Mar-2023                             û
      EG005(ED093)T: Total Metals by ICP-AES
     Soil Glass Jar - Unpreserved (EG005T)
                                                                                                                                                         23-Aug-2023                                           23-Aug-2023
        TP10-0.5                                                                                                    24-Feb-2023     17-Mar-2023                                   ü           22-Mar-2023                             ü
      EG048: Hexavalent Chromium (Alkaline Digest)
     Soil Glass Jar - Unpreserved (EG048G)
                                                                                                                                                         24-Mar-2023                                           24-Mar-2023
        TP10-0.5                                                                                                    24-Feb-2023     17-Mar-2023                                   ü           22-Mar-2023                             ü
      EN33: TCLP Leach - Inorganics/Non-Volatile Organics (Glass Vessel)
     Non-Volatile Leach: 180 day HT (e.g. PFAS, metals ex.Hg) (EN33a-G)
                                                                                                                                                         23-Aug-2023                                                ----             ----
        TP9-0.1                                                                                                     24-Feb-2023     16-Mar-2023                                   ü                ----
     Non-Volatile Leach: 28 day HT(e.g. Hg, CrVI) (EN33a-G)
                                                                                                                                                         24-Mar-2023                                                ----             ----
        TP10-0.5                                                                                                    24-Feb-2023     16-Mar-2023                                   ü                ----

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