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' ATTACHMENT A FIELD AND LABORTORY PROCEDURES ' HEALTH AND SAFETY As required by the Occupational Health and Safety Administration (OSHA) Standard "Hazardous ' Waste Operations and Emergency Response" guidelines (29 CFR 1910120), and by California Occupational Health and Safety Administration (Cal-OSHA) "Hazardous Waste Operations and Emergency Response" guidelines (CCR Title 8, Section 5192), SECOR prepared a Site-Specific ' Health and Safety Plan for use during fieldwork The field staff and contractors reviewed the Site- Specific Health and Safety Plan before beginning field operations at the site CPT BORINGS AND GROUNDWATER SAMPLING ' The CPT sod borings were advanced using a direct push cone penetrometer testing (CPT) rig to log sod stratigraphy Immediately adjacent to each CPT borehole, a second direct-push borehole was advanced to collect discrete groundwater samples Groundwater samples were collected using a hydropunch, or similar technology, by lowering a stainless steel or Teflon bailer into accumulated groundwater in the borehole, then retrieving and transferring the water into laboratory supplied containers The groundwater sample containers were placed on ice for transport to the laboratory ' accompanied by chain-of-custody documentation Down-hole boring and sampling equipment was steam-cleaned prior to and following the completion of the soil boring Down-hole sampling equipment was washed in a tri-sodium phosphate or AlconoxTM solution between samples ' LABORATORY PROCEDURES Groundwater samples collected were analyzed for the presence of TPHg and methanol by EPA Method 8015, BTEX, MtBE, EtBE, DIPS, TAME, TBA, EDB, 1,2 DCA, and ethanol by EPA Method I '. 8260B EXPLORATORY DRILLING The sod boring was drilled using 12-inch hollow-stem auger drilling equipment to approximately 40 feet bgs The boring was not logged due to its close proximity to CPT-2 Down-hole drilling and sampling equipment will be steam-cleaned prior to and following the completion of the soil boring f Down-hole sampling equipment will be washed in a tri-sodium phosphate or AlconoxTM solution between samples GROUNDWATER MONITORING WELL INSTALLATION The boring was converted to groundwater monitoring well by Installing a 6-inch diameter, flush- threaded, Schedule 40 PVC casing with 0 020-inch factory-slotted screen Approximately 15 feet of screen was placed In the bottom of the boring A grade of sand appropriate to the screen size was � placed in the annular space across the entire screened interval, and extends approximately 2 feet ' above the top of the screen for each well A bentonite seal extends two feet above the sand pack 10b The monitoring well was completed with neat cement from the bentonite seal to ground surface The well casing was topped with a locking cap, and the wellhead contained in watertight traffic rated, ' flush mounted well box SOIL SAMPLING FOR STOCKPILED SOIL ' Soil samples were collected by advancing a 2-Inch diameter stainless steel sample liner into the soil stockpile, after removing approximately 6-inches to 1-foot of surface material In the sample location One composite of four sod samples was collected per approximately 100 cubic yards of soil Soil samples for chemical analysis were retained in the brass liners, labeled, and capped with Teflon ' sheets and plastic end caps The samples were then sealed in zip-lock bags, placed on ice, and . transported to the laboratory accompanied by the appropriate chain-of-custody documentation ' I Thevron1914521REPORTSICPT and extraction well SA report doc