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r <br /> r <br /> r <br /> a Temperature, pH, and conductivity of each groundwater sample were recorded on <br /> field report forms <br /> a Following all sampling activities, the borings were backfilled with bentonite <br /> cement grout from the bottom of the boring to ground surface and capped with <br /> concrete <br /> Sample Retention and Analysis <br /> 1 <br /> a Chain of custody procedures, including the use of chain-of-custody forms, were <br /> used to document sample handling and transport from collection to delivery to the <br /> laboratory for analysis <br /> a The samples were placed on ice in an insulated chests overnight in the custody of <br /> an IT employee The samples were delivered to the IT office, in Sacramento, by <br /> IT personnel and then sent to laboratory personnel within approximately 24 hours <br /> of the day of collection The samples were transported to the laboratory in a <br /> motor vehicle <br /> a Soil samples were labeled with the boring number, and the sample collection <br /> depth For example, "SC-1-65" represents the first boring (1) collected at a depth <br /> of 65 feet BGS <br /> O Groundwater samples were labeled with the boring number <br /> a Laboratory quality assurance/quality control procedures are summarized below <br /> r <br /> - Method Blank Frequency = one per 10 samples <br /> — Matrix Spike/Matnx Spike Duplicate = one per 10 samples <br /> — Laboratory Control Sample/Laboratory Control Sample Duplicate= one per <br /> 10 samples <br /> 1 <br /> r <br /> Wmmetor,Tid=Av�WL%&MP0ozwRMJ8WWW72a&&c $-2 <br />