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Superior Precision Arra/ytica/,, h7C. <br /> A member of ESSCON Environmental Support Service Consortium <br /> iVOLATILE PETROLEUM HYDROCARBONS <br /> Quality Assurance and Control Data - Water <br /> Laboratory Number 92919 <br /> Method Spike <br /> Compound Blank RL Recovery Limits RPD <br /> (ug/L) (ug/L) (e) (o) (o) <br /> Gasoline ND<50 50 98/93 56-117 56 <br /> 0 <br /> Definitions <br /> ND = Not Detected ? <br /> RPD = Relative Percent Difference <br /> RL = Reporting Limit let <br /> ug/L = Parts per billion (ppb) Senior Chemi <br /> QC File No 92919 Account Manager <br /> Page 3 <br /> g of 3 <br /> Certified Laboratories <br /> 825 Arnold Dr Suite 1 14 1 SSS Burke St Unit 1 30,9S Cloverdale St Suite 8-24 <br /> Martinez California 94553 San Francisco California 94124 Seattle Washington 98108 <br /> (510) 229-1512 / fax (510) 229-1526 (415) 647-2081 / fax 14151821-7123 (206) 763-2992 / fax (206) 763-8429 <br />