Laserfiche WebLink
r <br /> SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> *Air (510) 686-9600 • FAX (510) 686-9689 <br /> Kapreallan Engineering, Inc Client Project ID Unocal, 2835 Navy Drive, Stockton <br /> P O Bax 996 <br /> Benicia, CA 94510 <br /> Attention Mardo Kaprealian, P E QC Sample Group 2041289-1292 Reported May 1, 1992 <br /> QUALITY CONTROL DATA REPORT <br /> SURROGATE <br /> Method EPA8015 EPAS015 EPA8015 <br /> Analyst A Tuzon A Tuzon A Tuzon <br /> Reporting Units mg/kg mg/kg mg/kg <br /> Date Analyzed Apr 30 1992 Apr 30 1992 Apr 30 1992 <br /> Sample # 204-1291 204-1292 Blank <br /> Surrogate <br /> % Recovery 319 317 153 <br /> 6 <br /> SEQUOIA ANALYTICAL %Recovery Cone of M S -Cone of Sample x 100 <br /> Spike Cone Added <br /> Relative% DFfierence Cone of M S Cone of M S D x 100 <br /> c hieffo (Cone of W5 + Conc of M S D)/2 <br /> Project Manager 2oa12r3s l <s- <br />