Laserfiche WebLink
• S stem (Appendix A) All soil generated during the drilling operation was stored on and covered <br /> ' with plastic sheeting on site pending laboratory analyses Samples were collected from the soil <br /> stockpile (SP-ABCD) for evaluation of disposal options (if required) <br /> 32 Soil Sampling <br /> ' Soil samples were collected during drilling using a modified split-spoon sampler containing <br /> three, 2-inch diameter by 6-inch long brass sample tubes The tubes were field screened for <br /> ' volatile organic compounds using a photoion izatxon detector(PID) calibrated to an isobutlyene <br /> standard Soil samples collected were sealed with TeflonzM tape, plastic caps and duct tape The <br /> ' soil samples were labeled with the appropriate borehole information, time and date of collection, <br /> and placed on ice for subsequent transport to and analysis at a State of California certified <br /> ' analytical laboratory Chain-of-custody procedures were followed at all times <br /> ' During drilling and sampling operations, all tools and down hole sampling equipment was steam <br /> cleaned prior to use Rinsatc water was contained during dnlling operations and was stored in a <br /> DOT-approved drum pending disposal evaluation <br /> ' 33 VaporWell I <br /> ' Two soil bonngs (W-7, W-8) were converted to vapor inlet wells The vapor inlet wells were <br /> constructed of 2-inch diameter, 0 020-inch machine slotted, Schedule 40 polyvmylchlonde <br /> ' (PVC) well screen, installed from the bottom of the borehole (56 5 feet bgs) to 25 feet bgs Two- <br /> inch diameter blank PVC casing completed the well from the top of the screened interval to <br /> ' within 1/2-foot of surface grade A gravel pack consisting of#3 Monterey sand was placed in <br /> the annular space from the bottom of the boring to approximately I foot above the screened <br /> ' interval A samtary seal consisting of 2 feet of hydrated bentonite chips was placed on top of the <br /> gravel pack, and bentonite cement slurry filled the remaining annulus to ground surface The <br /> ' vapor inlet wells were completed at ground surface with a water tight traffic rated street box set <br /> in cement, and a water tight, locking well cap <br /> • LOCKE RPT '] SEACOR` <br /> ' lob No N0005-001-01 J <br /> lune 14 1994 <br />