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ElSuperior Precision Analytical, Inc_ <br /> A member of ESSCON Environmental Support Service Consortium <br /> EPA SW-846 Method 8270 Semivolatile Organics by CC/MS <br /> Quality Assurance and Control Data <br /> Laboratory Number: 20030 <br /> Compound Sample SPK Level 5PX Result Recovery Limits RPD <br /> conc. # <br /> For Sail Matrix (ug/Kg) <br /> )3H301.24 02 / 03 - Laboratory Control Spikes <br /> phenol 3300 1959/1735 59/53 26-90 11 <br /> 2-chlorophenol 3300 2032/2094 62/63 25-192 2 <br /> 1,4-dichlorobenzene 1650 1004/1073 66/65 28-104 2 <br /> n-nitroso-di--n-propylamine 1650 1324/1370 80/83 41-126 4 <br /> 1,2,4-trichlorobenzene 1650 1128/1241 68/75 38-107 10 <br /> 4-chloro-3-methylphenel 3300 2352/2621 71/79 26-103 11 <br /> Aean2phthene 1650 1306/1291 79/78 31.-137 1 <br /> 2.4-dinitrotoluene 1650 2257/1416 76/86 28-89 12 <br /> 4-nitrophenol 3300 1624/2149 49/65 11-114 28 <br /> pentachlorophenol 3300 1863/2321 56/70 17-109 22 <br /> pyrene 1650 1959/1976 119/114 35-142 4 <br /> >? Surrogate Recoveries (t) << <br /> 2-fluorophenol 67/72 25-121 <br /> phenol-d5 70/67 24-113 <br /> nitrobenzene-d5 71/79 23-120 <br /> 2-fluorobiphenyl 80/76 30-115 <br /> 2,4,6-tribromophenol 80/80 19-122 <br /> terphenyl-d14 111/101 18-137 <br /> x- reporting limits were raised due to matrix interference <br /> Z - The surrogate recovery was high due to the presence of <br /> interfering compounds in the sample. <br /> Definitions: <br /> !3D Not Detected <br /> RL = Reporting Limit <br /> RA - Not Analysed <br /> RPD - Relative Percent Difference <br /> ug/L = parts per billion (ppb) ug/kg = parts per billion (ppb) <br /> mg/L - parts per million (ppm) mg/kg a parts per million (ppm) <br /> Page 7 of 7 <br /> Certified Laboratories <br /> 825 Arnold Dr Suite i 14 1555 Burke St.. Unit 1 309 S. Cloverdale Sr.. Suite 8-24 <br /> Martinez. California 94553 San Francisco. California 94124 Seattle, Washington 98108 <br /> 15 101229-1512 /fax (S 101229-1526 (4 1S) 647-2081 / fax 1415) 821-7123 (2061763-2992 /fax (206) 763. <br />