Remedial Action Report Construction Phase

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Specialty Analytical Date: 06-May-99 CLIENT: Century west Engineering QC SUMMARY REPORT Work Order: 9904185 Project: Courthouse Square Sample Matrix Spike Sample ID 9904185-01BMS Batch ID: 8260 S-5/4/9 Test Code: SW8260A Units: Ng/Kg Analysis Date 5/4/98 Prep Date Client ID: DW4-1-13.0' 9904185 Run ID: 5973J 990503A SeqNo: 389T3 Analyte Result PQL SPK value SPK Ref Val °/aREC LowLimit HighLimit RPD Ref Val %RPD RPDLimit Qual 1,1-Dichloroethene 27.3 10 40 0 68.3% 67.7 145 Benzene 44.22 10 40 0 110.6% 72 133 Chlorobenzene 42.72 10 40 0 106.8% 66.1 133 Toluene 45.58 10 40 0 114.0% 67.9 139 Trichloroethene 45.35 10 40 0 113.4% 73.1 128 Sampie ID 9904185-01BMSD Batch ID: 8260_S-5/4/9 Test Code: SW8260A Units: Ng/Kg Analysis Date 5/4/99 Prep Date Client ID: DW4-1-13.0' 9904185 Run ID: 5973J_990503A SeqNo: 38974 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit RPO Ref Val %RPD RPDLimit Qual 1,1-Dichloroethene 43.55 10 40 0 108.9% 67.7 145 27.3 45.9°/a 20 R Benzene 41.25 10 40 0 103.1 °h 72 133 44.22 6.9% 20 Chlorobenzene 41.06 10 40 0 102.7% 66.1 133 42.72 4.0% 20 Toluene 44.04 10 40 0 110.1 % 67.9 139 45.58 3.4% 20 Trichloroethene ~ 42.05 10 40 0 105.1 % 73.1 128 45.35 7.6% 20 Sample ID 9904148-046MS Batch ID: TCLP-M-516/9 Test Code: E1311/7000 Units: mg/L Analysis Date 5/5/99 Prep Date 5/6199 Client ID: 9904165 Run ID: TJA IRIS_9905048 SeqNo: 39217 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit RPD Ref Val %RPD RPDLimit Qual Mercury, TCLP .001945 0.0002 0.002 0 97.2% 80 120 Sample ID 9904148-048MSD Batch ID: TCLP-M-5/6/9 Test Code: E1311/7000 Units: mg/L Analysis Date 5/5/99 Prep Date 5/6/99 Client ID: 9904185 Run ID: TJA ~RIS 9905046 SeqNo: 39218 Analyte Result PQL SPK value SPK Ref Val %REC LowLimit HighLimit RPD Ref Val °/aRPD RPDLimit Qual Mercury, TCLP .001959 0.0002 0.002 0 97.9% 80 120 .001945 0.7% 20 ~ ~ ~ 1 oj2