ARCHIVED REPORTS_XR0005558 - Laserfiche WebLink

Home Browse Search

r ATTACHMENT B FIELD AND LABORATORY PROCEDURES Health and Safety y As required by the Occupational Health and Safety Administration (OSHA) Standard "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910 120), and by California Occupational Health and Safety Administration (Cal-OSHA) "Hazardous Waste Operations and Emergency Response" guidelines (CCR Title 8, Section 5192), SECOR will prepare a Site-Specific Health and Safety Plan prior to the commencement of fieldwork The Site-Specific Health and Safety Plan will be reviewed by the field staff and contractors before beginning field operations at the site Exploratory Drilling The soil borings will be drilled using an 8-inch hollow-stem auger drilling equipment to approximately 70 feet bgs The borings will be logged by a SECOR representative using the Unified Soil Classification System and standard geologic techniques Soil samples for logging will be collected at approximately 5-foot depth intervals using a California-modified split-spoon sampler The sampler will be driven a maximum of 18 inches using a 140-pound hammer with a 30-inch drop Soil samples collected for chemical analysis will be retained in brass liners, capped with Teflon squares and plastic end caps, and sealed in clean zip-lock bags The samples will be placed on ice for transport to the laboratory accompanied by chain-of-custody documentation Down-hole drilling and sampling equipment will be steam- cleaned prior to and following the completion of the soil boring Down-hole sampling equipment will be washed in an alconox or equivalent solution between sample collection Groundwater Monitoring Well Installation The borings will be converted to a groundwater monitoring well by installing 2-inch diameter, flush-threaded, Schedule 40 PVC casing with 0 020-inch factory-slotted screen Approximately 15 feet of screen will be placed in the bottom of each boring A grade of sand appropriate to the screen size will be placed in the annular space across the entire screened interval, and will extend approximately 2 feet above the top of the screen for each well A bentonite seal will extend two feet above the sand pack The monitoring wells will be completed with neat cement from the bentonite seal to ground surface The well casings will be topped with a locking cap The well heads will be contained in watertight well boxes, either traffic rated and flush mounted or in a "stove-pipe" arrangement The boring logs will show well construction details The wells will be developed after completion by pumping or bailing water from each well until the water is visibly clear, the wells go dry, or until a maximum of ten casing volumes have been removed Organic Vapor Procedures Soil samples collected at 5-foot depth intervals during drilling will be analyzed in the field for ionizable organic compounds using a photo-ionization detector (PID) with a 10 2 eV .} lamp or a flame ionization detector (FID) The instrument will be calibrated prior to drilling using a 100-ppm isobutylene standard (in air) and a sensitivity factor of 55, which relates the photo-ionization potential of benzene to that of isobutylene at 100 ppm The results of the