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Case Narrative Client : Antea USA Inc . Job ID : 440-246095- 1 Project/Site : ARCO 7049 , Lodi Job ID : 4_40 -246095 - 1 Laboratory : Eurofins TestAmerica , Irvine Narrative Job Narrative 440-246095-1 Comments No additional comments . Receipt The samples were received on 7/ 18/2019 7 : 30 AM ; the samples arrived in good condition , properly preserved and , where required , on ice . The temperatures of the 5 coolers at receipt time were 2 . 7 ° C , 2 . 9° C , 3 . 0° C , 3 . 11 C and 3 . 2° C . Receipt Exceptions Sample 440-246095- 14 soil jar was received saturated with water. Sample integrity may have been compromised . GC/MS VOA No analytical or quality issues were noted , other than those described in the Definitions/Glossary page . GC/MS Semi VOA Method (s) 8270C SIM : The source sample for the matrix spike / matrix spike duplicate ( MS/MSD) for preparation batch 440-558534 and analytical batch 440-558613 , was diluted due to the nature of the sample matrix. Because of this dilution , the surrogate spike and matrix spike concentration in the MS/MSD was reduced to a level where the recovery calculation does not provide useful information . The associated laboratory control sample ( LCS ) met acceptance criteria . Method (s) 8270C SIM : The following sample required a dilution due to the nature of the sample matrix ; high non-target hydrocarbons : PL9A-2_20190716 (440-246095- 18 ) . Because of this dilution , the surrogate spike concentration in the sample was reduced to a level where the recovery calculation does not provide useful information . No additional analytical or quality issues were noted , other than those described above or in the Definitions/Glossary page. GC VOA Method (s) 80158 : For the following sample , the 5g encore run was above calibration range and contained saturated peak(s) for GRO , while the 100ul extract run was below the reporting limit: PL1A-Surface_20190716 (440-246095-9 ) . The over range analyses is being reported . Method (s) 80158 : Surrogate recovery for the following sample was outside control limits : PL1A-Surface_20190716 (440-246095-9 ) . Evidence of matrix interference is present; therefore , re-extraction and/or re-analysis was not performed . Method (s) 8015B : For the following sample , the preserved soil run was above calibration range/contained saturated peak(s) for GRO , while the 100uL extract run was below the reporting limit: DISP4A_PL8A-2_20190716 (440-246095- 17 ) . Result is estimated . Both results are being reported . Method (s) 80158 : The following sample was diluted to bring the concentration of target analytes within the calibration range : DISP4A_PL8A-2_20190716 (440-246095- 17 ) . Elevated reporting limits ( RLs ) are provided . The preserved soil run was above calibration range/contained saturated peak(s ) for GRO , while the 1 00u extract run was below the reporting limit. Both analyses are being reported . No additional analytical or quality issues were noted , other than those described above or in the Definitions/Glossary page . GC Semi VOA Method (s) 801513 : The 8015-DRO method blank for preparation batch 440-558465 and analytical batch 440-558413 contained C23-C40 above the method detection limit . This target analyte concentration was less than the reporting limit ( RL) ; therefore , re-extraction and/or re-analysis of samples was not performed . No additional analytical or quality issues were noted , other than those described above or in the Definitions/Glossary page . Metals No analytical or quality issues were noted , other than those described in the Definitions/Glossary page . Eurofins TestAmerica Irvine Page 4 of 104 7/2 /2019