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A <br />uyµLENS KlV�Enlf�9L1�K�e <br />ROY F. WESTON, INC. <br />STOCKTON ANALYTICAL LABORATORY <br />ANALYTICAL CASE NARRATIVE <br />Client: AREG M.M. <br />RFW#: 9212S684 <br />Test: SW8015(MODIFIED)-TOTAL PURGEABLE PETROLEUM HYDROCARBONS <br />1. This narrative covers the analysis of seven (7) water samples in accordance with the <br />protocols based on The California Luft Manual. <br />2. The analytical hold time for this analysis was met. <br />3. Continuing calibration criteria was met for this analysis. <br />4. The method blanks associated with these samples were free of target analyte <br />interferences at, or above, the reporting limit. <br />5. The surrogate recovenes were within Laboratory Q.C. Limits. <br />6. The blank spike recovery was within Laboratory Q C. limits. <br />7. The matrix spike and matrix spike duplicate recoveries were within Laboratory Q C. <br />limits. The matnx spike RPD's were within Laboratory Q.0 limits. <br />8. Retention times were within acceptable Q.C. limits. <br />it Lll� —/ z ` �l ;7 <br />Unit Leader Date <br />