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CH ROMALAB INC. Submission # 1999-08-0176 <br /> Environmental Services (SDB) <br /> To Aqua Science Engineers, Inc Test Method 8260A <br /> Attn Ian T Reed Prep Method 5030 <br /> Batch QC Report <br /> Volatile Organic Compounds <br /> Matrix Spike ( MS 1 MSD ) Water QC Batch # 1999108113-01 27 <br /> Sample ID MW-1 Lab Sample ID 1999-08-0176-001 <br /> MS 1999108113-01 27-004 Extracted 08/14/1999 00 52 Analyzed 08/14/1999 00 52 Dilution 1 0 <br /> I MSD 1999108113-01 27-005 Extracted 08/14/1999 01 30 Analyzed 08/14/1999 01 30 Dilution 1 0 <br /> 3 <br /> !compound Conc [ ug/L]_ Exp Conc_ [ug/L] ]Recovery+(%j RPD Ctrl Limits [%] Flags <br /> MS 'MSD !Sample MS MSD MS MSD [%] Recovery RPD I M5 MSD <br /> Benzene 481 466 SND 500 50 0 9621 932- 32 69-129 20 <br /> Chlorobenzene M 0 54 6 ND 500 500 10401 1092 4 9 61-121 20 <br /> 1 1-Dichloroethene 1464 41 5 ND 500 500 928 830 11 1 65-125 20 <br /> Toluene ;45 9 452 ND 500 500 91 8 904 1 5 70-130 20 <br /> Trichloroethene �44 3 438 ND 50 0 500 88 6' 876 1 1 74-134 20 I [ <br /> Surrogate{s} <br /> ,4-Bromofluorobenzene 1540 538 500 500 1080 1076 86-115 <br /> I 1 2-Dichloroethane-d4 443 471 500 500 886 94 2 76-114 — <br /> Toluene-d8 466 464 500 500 932 928 88-110 <br /> E <br /> I <br /> I <br /> I <br /> I <br /> 1220 Quarry Lane`Pleasanton CA 94566-4756 <br />' Telephone (925)484-1919` Facsimile (925)484-1096 <br /> Printed on 08/24/1999 15 48 Page 16 of 16 <br />