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S a 3 <br /> f <br /> STL <br /> Submission 2005-04-0631 <br /> ' <br /> Volatile Organic Compounds by 82608 {Low Level} • <br /> -- —URS-San Francisco, CA - - — - — — — - -- - — —---- - -- -- - — <br /> Attn Erik Skov <br /> 221 Main Street#600 <br /> San Francisco, CA 94105 _ <br /> Phone (415) 896-5858 Fax (415) 882-9261 <br /> Project 28066866 03000 Received 04/20/2005 16 42 <br /> Unifirst Facility-Stockton <br /> Batch QC Report <br /> Prep(s) 5035 Test(s) 8260B <br /> Matrix Spike ( MS 1 MSD y Soil QC Batch#2005/04124-01 70 <br /> MS/MSD .. Lab ID 2005-04-0575 -009 ' <br /> MS 2005/04/24-01 70-007 Extracted 04/24/2005 Analyzed 041241200511 07 <br /> - _ - -t Dilution - 100 <br /> MSD 2005/04/24-01 70-040 Extracted 04/24/2005 Analyzed 04/24/2005 11 40 <br /> Dilution , 100 <br /> Compound! Conc ug/Kg Sekug/K Leve Recovery% Limits% - Fla s <br /> MS MSD Sample u911<9 MS MSD RPD Rec RPD IVIS MSD <br /> Benzene 91 3 898 ND 899 1016 99 7 19 69 129 - 20 ' <br /> Chlorobenzene 980 953 ND 899 1090 1058 30 61-121 20 <br /> 1 1-Dichloroethene 887 901 ND 899 987 1000 1 3 65-125 20 <br /> Toluene m 908 910 ND 899 1010 1010 00 70-130 20 <br /> Trichloroethene 933 887 ND 899 1038 98 4 53 74-134 20 ' <br /> Surrogate{s) <br /> 4-Bromofluorobenzene 487 488 500 974 976 60-130 <br /> 1 2-Dichloroethane-d4 481 490 500 961 98 0 60 140 <br /> Toluene-d8 1513 1480 1 1 500 1102 5 196 0 70 130 <br /> 1 <br /> 1 <br /> Severn Trent Laboratories, Inc 04/26120051510 <br /> STL San Francisco'1220 Quarry Lane Pleasanton CA 94566 <br /> Apail or Severn Trent Pic Tel 925 484 1919 Fax 925 484 1096'www stl-inc corn-CA DHS ELAP#2496 Page 12 of 12 <br />