ARCHIVED REPORTS_XR0006745 - Laserfiche WebLink

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' 11III 1,Mill suit Old(Gnuunl«qcr JMCMI =wm ( ox1i t.( v 1%e Mi ' 4,120 1'iotti.SI ',ioL klon (A J gnu tin 21 19114 P t�,c 2 ' 31 SITE PREPARATION Prior to the fieldwork drilling pt rinits N%ill be obtained from the San ioadunl County PIIS/EVID The proposed boring locations will be marled with x%hae paint and Underground Service Alert (USA) will be notified at least 72 hours in advance of the fieldNkork However because the proposed boring locations ' are on private property utilities contacted by USA -,%ill not marl. their I111eS past propertN lines and into the site 1-heicfore it is the responsibiht� of Canepa s Car Wash to locate and idLntifj underground utilItics in and near the work area I'he 1111ti/l:l ID will be notified of the fieldwork schcclulc at least 72 hours in advance 3 2 DRILLING PROCEDURES ' The fieldwork will include the installation of two borings at the proposed locations shown in Figure 2, Appendix A The boreholes will be drilled by Spectrum Exploration Inc (License #512268) under the supervision of a Condor geologist Prior to commencement of wort, each day a tailgate safet} meeting will be held and a site-specific Health and Safety Plan will be discussed with and presented to all creNN ' members for their signatures A copy of the Health and Safety Plan is contained 111 Appendix Q Both of the bormos %\ill be drilled using 6-inch O D continuous-flight hollow-stern auger The auger will be steam cleaned before each borehole is drilled The borings will be dulled to approximately 70 ' feet bgs for the purpose of collecting vadose zone soil samples and sirnlultaneous and discrete Soil and groundwater samples in the saturated zone with the Simulprobe sampling dei ice I he water table is appromi nately 40 feet beloN\ the ground surface Upon completion of the drilling and sampling the boreholes \%ill be grouted NNith a cement slurry containing 3 to 5 percent bentonite The slum Ni ill be tremied into the borehole to avoid bridging All decontamination ansate produced during the field work %%ill be placed in a 55-gallon drum sealed labeled and left on site pending laboratory anal\ses Disposal of hazardous materials ifan-, %\ill be the respofimbilitN of Canepa s Car Wash 33 SOIL SAMPLING Soil tramples \ill be collected using a five foot long split-spoon sampler fitted .+itli acetate liners The soil S,Illlplin Lquipment will be cleaned prior to collecting LAL11 sample rhe Ocaning procedures \%ill consist of washing the samplci in a Solution of laboratory- raclL 11(,11-ph0sphate dctLF(,cnt and hydrocarbon-lre(. eater and double-rinsing \%ith contaminant-free %\atcr During the s impling the split-spoon will he driven ahe:d of the -uper S011 sn'npies tie-in he collected for laboratory analysis at five foot inter\als, or at significant hthologic changes in the vadose Lone Discrete soil Samples will be collected for analysis by cutting a six inch long segment from the desired portion of the soil filled acetate liner A portion of the liner contents \vill be used for geological logging 1 and organic vapor analyzer-photoionization detector(OVA-PID) measurements The sample selected for analysis will be prepared as described below for shipment to the laboratory The samples will be iogged WlLording to the Unified Soil Ciassification System Driiiing, iogs \viii De preparea ana viii includ[, f ic.ld obsen ations such as estimated moisture t,ontent color and odor Selected soil samples collected from each borehole will be sent to the laboratory for chemical analvsis based on field observations and OVA-PID measurernents At least five soil simples from the. vadose zone of each boring \sill be anaNzed Each sample %ill be retained undi4sturbed in the: acetate; hirer sealt,d it the ends �\ith Z efloln tape capped wrapped with duct tape. and labc,lcd 111L samples will be stored in a cooler chilled with Blue Ice and dcliverLd within 24 hours of coliec 1011 under chain-oi- uistocl,, procc,dures to CGeoAnalytieal Laboratories, in Modesto Cahlornia 0 California State Certified �� CONDOR