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• • GeoAnalytical Laboratories, Inc. 1 105 Kansas Avenue Modesta CA 95351 Phone(209)572-0900 Far(209)572-0916 Date: 04/25/08 Report# U81)I412 Project: . San Joaquin County Environmental Health Date Recd: 04/14,08 600 East Main St PO#: Stockton,CA 95202 CERTIFICATE OF ANALYSIS Sample ID:41008-02 Date Sampled: 04/10/08 Lab ID: U8D1412-02 Time: 14:40 Sample Notes: Sampler: Kasey Foley Custom Semi-Volatiles GUMS Analysis On April 14, 2008, GeoAnalytical Laboratories, Inc. received a single 500 mL glass jar secured with green security seal. The sample is to be identified using a GC/MS instrument according to COC U8D1412. On April 16, 2008 a diluted sample, (13.9mg/ 1.5ml)was analyzed by gas chromatography/mass spectrometry under the conditions of EPA Method 8270C Semivolatile Organic Compounds by GC/MS. This method is designed to look for part-per-billion levels of organic compounds having boiling points between 150° - 300°C. The GUMS software utilizes the National Bureau of Standards 75K library that contains the reference spectra of 75,000 common natural and synthetic organic compounds. On April 17, 2008 the sample data was reviewed along with diesel, motor oil and mineral oil standards. The sample U8D1412-02 exhibited a similar chromatography pattern closely resembling motor oil, however many types of petroleum products could give a similar pattern If you need to differentiate between plant/animal fat and petroleum oil, we can perform silica clean up(Method 3630B) to remove the plant and animal fat, then re-analyze the extract containing only petroleum product. In summary based on the data, the sample "41008-02" from the Boiler room drain is a petroleum based product similar to motor oil. This was strictly a qualitative analysis. Mario D'Onofrio Donna Keller Chemist Laboratory Director Certification 0 2585