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�- 7^•03; 5.24Gr�:sa�r�mento 6M�,. <br /> Method 3550 Sonication sample preparation, extraction method <br /> Method 5030 Purge and trap sample preparation <br /> QA/QC Quality Assurance/Quality Control <br /> Notes: To avoid false positive detection of benzene, benzene-free solvents are to he used, Fused capillary <br /> columns are ,preferred to packed columns; a packed column may be used as a"first cut"with "dirty"samples or <br /> once the hydrocarbons have been characterized and proper QA/QC is followed. For drinking water sources, EPA <br /> recommends that the 500 series for volatile organic should be used in preference to the 600 series because the <br /> detection limits are lower and the QA/QC is better. Samples exhibiting any level of heavy metal contamination <br /> may require further analysis. PHS-EHD recommends holding those samples until disposal Es indicated. <br /> EH23 046 (Revised 05/09/00) <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> (209)465-3420 <br /> AUTHORIZATION TO RELEASE <br /> *ANALYTICAL RESULTS <br /> * GEOTECHNICAL DATA <br /> * ENVIRONMENTAL/SITE ASSESSMENT INFORMATION <br /> 1, THE UNDERSIGNED OWNER AND/OR OPERATOR, OF THE PROPERTY AND/OR FACILITY LOCATED AT <br /> (Street Address) <br /> (City) <br /> 198-d 600/900 d OtiV-1 E9£9 ZV£ 8Dl 901£9 01 19g109 0140ed HTA-woj� �P:80 £O-0I-qg:! <br />