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ENVIRONMENTAL <br /> Analytical Chemists <br /> May 23, 1997 INORGANIC Quality Assurance Report for sample: 732220 <br /> Stockton Bumper Service <br /> Attn: Del Parks <br /> 632 S. El Dorado <br /> Stockton CA <br /> —952-01-M7-- <br /> BATCH <br /> 01-M7--BATCH BLANK QA/QC CALIBRATION QA/QC METHOD QA/QC <br /> Constituent ID Method Units DLR Result NOTE Type Conc. % REC AR NOTE Type Conc. % REC % REC AR % DIF MAV NOTE <br /> Chromium OF52A 6010 mg/L 0.050 ND LCS 1.00 101 75-125 Dup -.00165 N/A N/A N/A 12.1 20.0 <br /> • Copper OF52A 6010 mg/L 0.050 ND LCS 1.00 100 75-125 Dup 0.0124 N/A N/A N/A 8.1 20.0 <br /> Lead OF52A 6010 mg/L 0.030 ND LCS 1.00 103 75-125 Dup 0.00625 N/A N/A N/A 17.6 20.0 <br /> Nickel OF52A 6010 mg/L 0.050 0.06 215 LCS 1.00 107 75-125 Dup 0.0295 N/A N/A N/A 9.7 20.0 <br /> Zinc OF52A 6010 mg/L 0.10 ND LCS 1.00 103 75-125 Dup 0.293 N/A N/A N/A 6.6 20.0 <br /> FGL ID = 19970517 ND => Not Detected at ar above DLR. DLR => Detection Limit for Reporting purposes. N/A => Not Applicable NOTE => See note indicated below. <br /> Notes: <br /> 215 The blank was positive. However, the sample concentration was at least ten times greater than the <br /> blank concentration and not affected. <br /> FGL ENVIRONMENTAL, INC. <br /> 67 -_ <br /> CJ:jgc <br /> Charles Johns B.S. , QA/QC Officer <br /> Corporate Offices&Laboratory Office&Laboratory Field Office <br /> P.O.Box 272/853 Corporation Street 2500 Stagecoach Road Visalia,California <br /> Santa Paula,CA 93061-0272 Stockton,CA 95215 TEL:(209)734-9473 <br /> TEL:(805)659-0910 TEL.(209)942-0181 Mobile:(209)737-2399 <br /> rnv fgnG1"> 117^ FAX:(209)942-0423 FAX:(209)734-8435 <br />