ARCHIVED REPORTS_SEPARATE PHASE HYDROCARBON INVESTIGATION UNOCAL EXTRACTION WELL PILOT STUDY 2011

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Lancaster r Laboratories Analysis Report 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17605-2425•717-656-2300 Fax.717-656-2681•www.lancasterlabs.com Pa-e 2 of Quality Control Summary Client Name: STANTEC-TIDEWATER Group Number: 1209952 Reported: 09/14/10 at 04:23 PM Surrogate Quality Control Surrogate recoveries which are outside of the QC window are confirmed unless attributed to dilution or otherwise noted on the Analysis Report. Analysis Name: 8260 VOCs + GRO Batch number: A102511AA Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene 6074280 96 96 106 93 6074281 94 91 116 108 6074282 93 94 111 103 6074287 93 95 107 95 6074289 93 95 107 105 6074290 94 94 106 105 Blank 98 105 102 95 LCS 99 104 103 102 MS 98 99 105 98 MSD 97 95 105 96 Limits: 71-114 70-109 70-123 70-111 Analysis Name: 8260 VOCs + GRO Batch number: R102531AA Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene 6074283 79 77 91 95 6074284 81 79 97 104 6074285 77 77 93 99 6074286 84 83 88 102 6074288 78 76 79 85 Blank 88 86 86 88 LCS 94 94 94 97 LCSD 94 92 94 97 Limits: 71-114 70-109 70-123 70-111 Analysis Name: 8260 Master Scan (soil) Batch number: R102561AA Dibromofluoromethane 1,2-Dichloroethane-d4 Toluene-d8 4-Bromofluorobenzene Blank 92 88 87 89 LCS 97 94 93 97 LCSD 96 93 93 97 Limits: 71-114 70-109 70-123 70-111 Analysis Name: TPH-DRO soil C10-C28 microwave Batch number: 102450022A Orthoterphenyl 6074280 86 6074281 89 6074282 89 6074283 148* 6074284 116 6074285 116 6074286 331* 6074287 94 *-Outside of specification (1)The result for one or both determinations was less than five times the LOQ. (2)The unspiked result was more than four times the spike added.