Laserfiche WebLink
r� <br /> Three soil samples per soil boring will be submitted for laboratory analysis. The samples <br /> collected at the 15, 20 and 25 feet below the parking area subgrade (25, 30 and 35 feet below <br /> street surface grade) will be analyzed. Additional soil samples may be submitted for analysis, if <br /> required to adequately characterize the site. Field observations and sample selection will be <br /> reviewed with the PHS/EHD inspector, prior to sample submittal to the lab. <br /> Each soil sample will be sealed with Teflon®film and plastic end caps, labeled, packaged in an <br /> iced cooler, and transported with chain-of-custody documentation to a state of California-certified <br /> hazardous waste testing laboratory for analysis. The lab will analyze each of the soil samples on <br /> a standard turn-around for TPH-as-gasoline, BTEX, MTBE, DIPE, ETBE, TAME, and TBA by <br /> EPA Method 82608. <br /> 2.2.3 Groundwater Monitoring, Sampling and Analysis <br /> After the monitoring well seals have set for at least 72 hours, and then on a quarterly basis <br /> thereafter, the wells will be monitored and sampled. Depth-to-groundwater and free product <br /> thickness (if necessary) will be monitored using a water level indicator capable of measurements <br /> to within 0.01 foot. Following groundwater level measurements, the wells will be purged and <br /> sampled. <br /> The wells will be purged with a pump and dedicated disposable tubing until at least three well <br /> casing volumes have been removed and/or after groundwater temperature, pH and electrical <br /> conductivity values have stabilized. Groundwater will be sampled from the wells using <br /> disposable polyethylene bailers and laboratory-supplied containers. Each sample container will <br /> be labeled, packaged in an iced cooler and transported for analysis with chain-of-custody <br /> documentation to a state of California certified hazardous waste testing laboratory. The lab will <br /> analyze each groundwater sample on a standard turn-around for TPH-as-gasoline, BTEX, <br /> MTBE, DIPE, ETBE, TAME, and TBA by EPA Method 82608. <br /> 2.2.4 Waste Storage and Disposal <br /> All waste soil generated during drilling will be contained in 55-gallon drums and temporarily <br /> stored at the site, pending analytical results and proper disposition. Equipment rinsate and <br /> purged groundwater will be contained in separate 55-gallon drums for temporary on-site storage, <br /> `- pending accumulation and proper disposition. <br /> 8 <br />