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� � 4 <br /> p <br /> City of Stockton <br /> February 6, 1997 A68108.OIB <br /> Page A-5 <br /> A-6 Standard Operating Procedures for Performing Head Space°Analysis: Head space <br /> analysis may be performed using a photoionization detector (PID) or a drager tube. A soil <br /> _ sample is placed in a sealed glass container or plastic bag, agitatedI and placed in a warm <br /> atmosphere. After approximately 15 minutes, which is generally sufficient for some of the <br /> t <br /> volatiles to escape from the soil, the PID probe or tip of the drager tube is inserted into the <br /> container and the gas is sampled. The highest concentration of organic vapors recorded by <br /> the PID or the drager tube reading will be recorded. <br /> A-7 Standard Operating Procedures for Decontamination Rinsate, Monitoring Well <br /> Purge Water, and Soil Cuttings Disposal: The soil cuttings generated by drilling operations <br /> are retained on site, and either covered by plastic sheeting or containerized in United States <br /> Department of Transportation (DOT)-approved drums. The drilling equipment <br /> decontamination rinsate is also stored in drums. Drums containing soil and rinsate are <br /> sealed and temporarily stored on site at a location remote to the public. Each drum is <br /> labelled to identify its contents. Disposal of these wastes will be the responsibility of the <br /> client. The client will be informed that the wastes must be disposed in accordance with <br /> applicable Federal, State, and local regulations. p f <br /> il, Fh 1 <br /> �k <br /> 7 n� <br /> k I <br /> i <br /> r'I <br /> {1 t <br /> 1y �� <br /> i4 <br />