COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

Stockton Cineplex Subsurface Investigation contractor conducting the drilling will posses a valid C-57 license and proof of workman's compensation insurance. All drilling equipment will be thoroughly steam cleaned before drilling begins to prevent the introduction of contamination from off site, and between borings to prevent cross contamination. The borings will be logged under the direct supervision of a registered geologist using the Unified Soil Classification System. The color, texture, moisture, plasticity (if applicable), consistency of the earth materials, pertinent soil or bedrock characteristics, and any evidence of contamination will be noted. All water-bearing zones and the depths at which they are encountered will be noted on these logs. All borings will be drilled in such a manner as to prevent cross contamination between strata. Water samples will be taken at the soil/groundwater interface (if encountered), and the borings will then be terminated with cement. 2.2 Soil Sampling All soil sampling equipment will be thoroughly steam cleaned before and between sampling to prevent cross contamination. Relatively undisturbed soil samples will be taken at intervals of not more than five feet (5') in order to evaluate the subsurface materials. The soil samples will be taken using a Geoprobe® core sampler with plastic liners. The sampler will be pushed (Direct Push Technology) continuously by the hydraulically powered, percussion system. The laboratory samples will not have headspace and will immediately be sealed in their liners using plastic caps. The remaining sample will be removed from its liner to be used as an aide to the on-site geologist in logging the material at that depth. Soil samples will be collected at five foot intervals for geological interpretation and laboratory analysis (2 laboratory soil samples per boring). All soil samples will be delivered, under chain of custody, to an analytical laboratory licensed by the State of California for hazardous materials work. The samples shall be analyzed for Total Petroleum Hydrocarbons (gasoline), Total Extractable Petroleum Hydrocarbons (oil, diesel, kerosene) by 5030 Luft. BTX&E (Benzene, Toluene, Xylene, and Ethyl Benzene) and MTBE along with the other aromatic and halogenated compounds by Method 8260B. The minimum detection limits used for each analyte will be .005 mg/kg for BTX&E, 0.01 mg/Kg for the Oxygenated compounds (0.1 mg/Kg for tertiary-Butanol), and 1.0 mg/Kg for gasoline and oils. Analyses are to be conducted by GeoAnalytical Laboratories, Inc., in Modesto, California. All rinse water will be removed by the driller, V&W Drilling, Inc. Drill cuttings are not produced by this method. 2