ARCHIVED REPORTS XR0006644 - Laserfiche WebLink

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ENTRY OBJECTIVIES Offsite vertical and lateral extent groundwater sampling. Using CPT direct push drilling rig,will test formation to 240 foot depth with CPT log evaluate where water samples will be obtained using hydropunch type sampler. Water samples will be Geld screened with lOS50 PID-GC for presence of MTBE and Benzene. If field screening indicates positive concentrations of MTBE and/or Benzene a secant CPT test boring will be performed down gradient of the first. Boring have been permited through and will be destroyed under the direction of San Joaquin County Health. Work area will be coned off to prevent the general public from access. All fluids and soils generated from the boring activities will be placed into 55 gallon drums and stored within the treatment compound fenced area located at 6425 Pacific Avenue. SITE ACTIVITIES: 1. Conduct Health and Safety meeting 2. Set up traffic safety cones and signs 3. Position drilling rig. t 4. Conduct CPT testing to 250 feet below surface. 5. Based on CPT logs perform hydropunch sampling to desired depths and obtain groundwater samples. 6. Field screen water samples for Benzene and MTBE f 7. Determine if second CPT test hole is necessary. S. Destroy test borings by trimie method. 9. Clean and secure drilling site. 10. Remove traffic safety 11. Decon drilling/sa in p ling equipment, place decon fluids into 55 gallon drums JOB HAZARD ANALYSES PHYSICAL HAZARDS X NOISE X TRAFFIC X_UNDERGROUND HAZARDS OVERHEAD HAZARDS —EXCAVATIONS/TRENCHES X MECHANICAL EQUIPMENT X OTHER GASOLINE POWERED ELECTRICAL GENERATOR AND ELECTRICAL CORDS COULD CAUSE A SHOCK HAZARD. WEATERH IS COLD AND WET (RAIN) EXTRA CARE SHOULD BE TAKEN IN PREVENTING WET,SURFACE SLIPING AND ELECTRICAL SHOCK CARE SHOULD BE TAKEN TO NOT ALLOW STROM WATER FROM ENTERING THE EXCAVATION AND OR STORM DRAINS THAT MAY CONTAIN CONTAMINATED MATERIAL. 2 R603 HEALTWSAFETY