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The spike and/or spike duplicate (See Below) recoveries were not all within the acceptance limits. The <br />associated spike and/or spike duplicate passed recoveries near the lower/upper end of the limits. <br />Sample <br />Analyte <br />Value <br />1203672845 (W356453PS) <br />Bromomethane <br />25* (30%-135%) <br />1203672846 (W356453PSD) <br />1,2,3-Trichlorobenzene <br />36* (40%-147%) <br />Bromomethane <br />23* (30%-135%) <br />Hexachlorobutadiene <br />34* (38%-153%) <br />4-Isopropyltoluene <br />Naphthalene <br />38* (45%-142%) <br />F(EcENEO <br />FEB 0 9 2017 <br />ENVIFiONMENTg_ HEAJH <br />J)Ej3ARTMENT <br />Relative Percent Difference (RPD) Statement <br />The RPD between the matrix spike pair (See Below) were not all within the acceptance limits. The unacceptable <br />RPD may be attributed to matrix interference and/or sample non -homogeneity. <br />Sample <br />Analyte <br />Value <br />1203672845PS and 1203672846PSD (W356453) <br />1,2,3-Trichlorobenzene <br />77* (0%-20%) <br />1,2,4-Trichlorobenzene <br />70* (0%-20%) <br />1,2,4-Trimethylbenzene <br />26* (0%-20%) <br />1,3,5-Trimethylbenzene <br />22* (0%-20%) <br />4-Isopropyltoluene <br />23* (0%-2(r) <br />Hexachlorobutadiene,Naphthalene <br />77* (0%-20%) <br />n-Butylbenzene <br />48* (0%-20%) <br />sec-Butylbenzene <br />30* (0%-20%) <br />tert-Butylbenzene <br />22* (0%-20%) <br />Technical Information <br />Sample Dilutions/Methanol Dilutions <br />Samples 1203672843 (HB), 1203672845 (W356453PS), 1203672846 (W356453PSD), 410337001 (W356453) <br />and 410337002 (W356456) were analyzed using a methanol dilution extraction procedure because the sample <br />matrices were not amenable to more concentrated analyses. <br />410337 <br />Matytc <br />001 002 <br />several 50X 50X <br />Certification Statement <br />Where the analytical method has been performed under NELAP certification, the analysis has met all of the <br />requirements of the NELAC standard unless otherwise noted in the analytical case narrative. <br />Page 10 of 56 <br />