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WILaleck Laboratories, Inc. <br />Environmental and Analytical Services - Since 1964 <br />Quality Control Report <br />Week Laboratories, Inc <br />Oil & Grease in Solids by EPA 1664M (Gravimetric) - Quality Control <br />Sample QC Spikeo/ RPD <br />Analyte Result Result Qualifier Units Level %REC Limits RPD Limit <br />Batch W307033 - General Prep <br />Blank M07033-BLK1) <br />Prepared &Analyzed• 01 -Jul -03 _ <br />Oil & Grease .................................... ND <br />mg/kg <br />US On— 33 -RSI) <br />Prepared &Analyzed• OI -Jul-03 <br />Oil & Grease .................................... <br />7620 mg/kg 7720 98.7 - 70-130 <br />Matrix spike (W307033-MS1) <br />Source: 3061204-01 Prepared & Analyzed: 01 -Jul -03 _. <br />Oil & Grease....................................730 4760 mg/kg 4800 84.0 70-130 <br />Matrix pike Dup_OV307033-MSD1) Source: 3061204-01 Prepared & Analyzed• 01 -Jul -03 _ <br />Oil & Grease....................................730 5170 <br />mg/kg 5610 79.1 70-130 8.26 30 <br />Authorized Signature <br />ELAP # 1132 <br />LACSD # 10143 <br />The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. <br />Votes: <br />rhe Chain of Custody document is part of the analytical report. <br />kny remaining sample(s) for testing will be disposed of one month from the final report date unless other arrangements are made in advance. <br />kii results are expressed on wet weight basis unless otherwise specified. <br />4D=Not detected, below the reporting limit. <br />iub=Subcontracted analysis, original report enclosed. <br />-lags for Data Qualifiers: <br />Lab#: 3062618 Page 2 of 2 <br />14859 East Clark Avenue, City of Industry, California 91745-1396 (626) 336-2139 FAX (626) 336-2634 <br />11 , <br />