REFERENCE DOCUMENTS - RAL25/0004 (As Published)

    Page                        : 3 of 4
    Work Order                  : EB2408662
    Client                      : ENVIRONMENTAL ADVISORS
    Project                     : 125 NSC LAKE McDONALD DVE, COOROY

    Method Blank (MB) and Laboratory Control Sample (LCS) Report
    The quality control term Method / Laboratory Blank refers to an analyte free matrix to which all reagents are added in the same volumes or proportions as used in standard sample preparation. The purpose of this QC
    parameter is to monitor potential laboratory contamination. The quality control term Laboratory Control Sample (LCS) refers to a certified reference material, or a known interference free matrix spiked with target
    analytes. The purpose of this QC parameter is to monitor method precision and accuracy independent of sample matrix. Dynamic Recovery Limits are based on statistical evaluation of processed LCS.

    Sub-Matrix: SOIL                                                                                                     Method Blank (MB)                               Laboratory Control Spike (LCS) Report
                                                                                                                              Report                     Spike                 Spike Recovery (%)            Acceptable Limits (%)

     Method: Compound                                              CAS Number         LOR                 Unit                  Result             Concentration                       LCS                  Low               High

     EG005(ED093)T: Total Metals by ICP-AES (QCLot: 5664648)
     EG005T: Chromium                                              7440-47-3           2                 mg/kg                  <2                 14.5 mg/kg                          106                  83.0               125

     EN33: TCLP Leach - Inorganics/Non-Volatile Organics (Glass Vessel) (QCLot: 5666945)
     EN33a-G: Final pH                                                    ----        0.1               pH Unit                5.0                        ----                          ----                ----               ----

     EG048: Hexavalent Chromium (Alkaline Digest) (QCLot: 5664649)
     EG048G: Hexavalent Chromium                                  18540-29-9          0.5                mg/kg                 <0.5                 20 mg/kg                           90.0                 80.0               120
                                                                                                                               <0.5                13.93 mg/kg                         114                  70.0               130

    Sub-Matrix: WATER                                                                                                    Method Blank (MB)                               Laboratory Control Spike (LCS) Report
                                                                                                                              Report                     Spike                 Spike Recovery (%)            Acceptable Limits (%)

     Method: Compound                                              CAS Number         LOR                 Unit                  Result             Concentration                       LCS                  Low               High

     EG005(ED093)C: Leachable Metals by ICPAES (QCLot: 5671797)
     EG005C: Copper                                                7440-50-8          0.1                mg/L                  <0.1                  0.1 mg/L                          106                  87.0               117
     EG005C: Lead                                                  7439-92-1          0.1                mg/L                  <0.1                  0.1 mg/L                          99.3                 85.0               117
     EG005C: Nickel                                                7440-02-0          0.1                mg/L                  <0.1                  0.1 mg/L                          98.1                 90.0               116
     EG005C: Zinc                                                  7440-66-6          0.1                mg/L                  <0.1                  0.1 mg/L                          102                  87.0               122

     EG020C: Leachable Metals by ICPMS (QCLot: 5668524)
     EG020A-C: Zinc                                                7440-66-6          0.1                mg/L                  <0.1                  0.1 mg/L                          107                  89.0               114



    Matrix Spike (MS) Report
    The quality control term Matrix Spike (MS) refers to an intralaboratory split sample spiked with a representative set of target analytes. The purpose of this QC parameter is to monitor potential matrix effects on
    analyte recoveries. Static Recovery Limits as per laboratory Data Quality Objectives (DQOs). Ideal recovery ranges stated may be waived in the event of sample matrix interference.
    Sub-Matrix: SOIL                                                                                                                                                             Matrix Spike (MS) Report

                                                                                                                                                                    Spike            SpikeRecovery(%)       Acceptable Limits (%)
     Laboratory sample ID    Sample ID                                            Method: Compound                                           CAS Number          Concentration                 MS           Low               High

     EG005(ED093)T: Total Metals by ICP-AES (QCLot: 5664648)
      EB2408662-002         TP14-3.3                                              EG005T: Chromium                                           7440-47-3             50 mg/kg                    88.4         70.0             130
     EG048: Hexavalent Chromium (Alkaline Digest) (QCLot: 5664649)
      EB2408662-001         TP12-1.0                                              EG048G: Hexavalent Chromium                                18540-29-9            20 mg/kg                    71.1         70.0             130
      EB2408662-001         TP12-1.0                                              EG048G: Hexavalent Chromium                                18540-29-9          13.93 mg/kg                   99.2         70.0             130

    Sub-Matrix: WATER                                                                                                                                                            Matrix Spike (MS) Report
                                                                                                                                                                    Spike            SpikeRecovery(%)       Acceptable Limits (%)
     Laboratory sample ID    Sample ID                                            Method: Compound                                           CAS Number          Concentration                 MS           Low               High
Document Set ID: 23717062
Version: 0, Version Date: 01/01/1900