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EDSTgTFs United States Environmental Protection Agency <br /> Region 9 Laboratory <br /> W <br /> Q <br /> ��o= 1337 S.46th Street, Building 201, Richmond, CA 94804 <br /> .1144 PROl Phone:(510)412-2300 Fax:(510)412-2302 <br /> Project Manager: Carolyn Douglas Brownfields and Site Assessment Section SDG: 11021B <br /> Project Number: R11B03 75 Hawthorne Street Reported: 02/22/11 13:18 <br /> Project: El Concilio Site#2 2011 TBA San Francisco CA,94105 <br /> ANALYTICAL REPORT FOR SAMPLES <br /> Sample ID Laboratory ID Matrix Date Collected Date Received <br /> EC2-S-06-15 1101029-05 Soil 01/20/1108:00 01/21/1109:40 <br /> EC2-S-10-0.5 1101029-06 Soil 01/20/1108:10 01/21/1109:40 <br /> EC2-S-10-2.5 1101029-07 Soil 01/20/1108:15 01/21/1109:40 <br /> EC2-S-10-5 1101029-08 Soil 01/20/1108:20 01/21/1109:40 <br /> SDG ID 110218 <br /> VOCs by GC/MS: Eight compounds in the Matrix Spike and ten compounds in the Matrix Spike Duplicate were biased high <br /> and failed to meet recovery criteria, despite meeting Relative Percent Difference criteria. Results were reported with Q4 <br /> qualifier flags in the associated sample 1101029-08, and the discrepancy attributed to matrix interference evidenced by <br /> Blank Spike recoveries which passed criteria and also from finding no positive hits in the sample. <br /> Work Order(s) <br /> 1101029 <br /> 1101029 FINAL 02 22 11 1318 Page 1 of 15 <br />