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1 <br /> 9 <br /> I <br /> EXCELCHEM - <br /> ENVIRONMENTAL LABS <br /> 500 Giuseppe Court, Suite 9 e <br /> Roseville, CA 95678 <br /> Phone# (916) 773-3664 Fax# (916) 773-4784 <br /> QA/QC REPORT <br /> Attention Matthew Taylor Date Analyzed 11'-19-97 <br /> Wallace-Kuhl & Associates Matrix Water <br /> 3Q50 Industrial Blvd <br /> West Sacramento, CA 95691 <br /> Project 2938 0311444 Mariposa <br /> TPHd <br /> PPB <br /> Reportina Limit 50 <br /> • QA/QC PARAMETER i <br /> Matnx Blank ND <br /> PERCENT RECOVERIES <br /> Laboratory Control Spike 71% <br /> a <br /> Laboratory Control Spike Duplicate 68% <br /> ppb=parts per billion=ug/L=rrucrogram per liter <br /> ND=Not detected Compound(s)may be present at concentrabons below the repotting hinit <br /> Spikes&Spike Duplicates were each spiked with 5000 ug of diesel standard <br /> ANALYTICAL PROCEDURES <br /> TPHd-'T'otal petroleum hydrocarbons as diesel(high boiling points)are measured by extraction using EPA Method 3510,followed by modified EPA <br /> Method 8015 with direct sample injection into a GC equipped with an FID <br /> ' I <br /> 12-01-97 <br /> • a o tory Representative Date Reported <br /> PXCFLL HPM FN VIRONMENTA L LABS IS CFRTIFIF D BY THE STATP OF CAI IFORNIA <br /> pFPARTMENT OF HEALTH SERVICES AS A HAZARDOUS WASTE TESTING LABORATORY <br /> (CertlBationNo 21M) <br /> 7 <br />