Laserfiche WebLink
1.L! LV! LVU I il.Ul 1 VUVJT;JTU I I r'1\AL L1f LV <br /> JAN. 8 2007 1 :42?M WARD REAL ESTATE 879-7213 N0. 396 R, 23 <br /> ,A,'ZTTACHMNT B <br /> FMLD An LABORATORY PROCEDURES <br /> Exploratory Drilling <br /> All soil borings will be drilled using 8,inch hollow-stem auger dellitlg equipment. The two <br /> borings to be converted to groundwater mart toriug wells (U-5 and U-6) will be chilled to <br /> approximately 15 feet below the cutrenit water level and will be screened from 5 feet above. <br /> 'total depth win be approximately 25 feet below ground surface (bgs). The boring in the <br /> location of the former waste oil tank (B-4) will be'drilled to a depth of approximately 50 ft <br /> bgs or =til a minimum of two non detects are measured using field analytical tecbniquea <br /> (PID or FM). A coatio,ucus core sample will be oolleeted f1:om this boring to analyze <br /> geological c=ditions ort site. Furthe=ore, after reachimg mu m= depth, a hydropunch <br /> will be driven end a discrete gromldwater sample, will be coReeted. Borirz$s will be logpd <br /> by a Pacific Snviromental Group, Inc. geolagist using the Unified Soil C'lusifioation <br /> Syatem and standard geologic tecb6ques. Soil'samples will be collected at 5-foot depth' <br /> intervals using a CaafornisL-modified split-spoon sampler. The sampler will be driven a <br /> azaacirnum of 18 inchas using a 140-pound hammer with a 30-imb.drop. All soil samples fvr <br /> chemical atalysis will be retained in brass liners, capped with.Taflcm squares and plastic Md <br /> caps, and sealed in Ziplock7'-style bags. The samples will be placed on ice for transport to <br /> the laboralwy accompanied by chain-of�custody doo=entatiun, Au down-hole drilling and <br /> sampling.equipment will 'be $team-cleaned fallowing the completion of the soil boring. <br /> Down-hole. sanlpli eguiptt t wi11 be washed in a tri-aodium phosphate or al ox <br /> solution between samples. <br /> Groundwater Monitoring WeA Installation <br /> The Borings U-5 and U-6 will be converted to Smundwater monitoring wells by installing <br /> 2-inch diameter, flush-threaded, Schedule 40 PVC casing with 0.020-inert factory-slattad <br /> semen. Approxf nately 20 feat of screen will be placed in the bottom of the boting. An <br /> RMC 2112 sand pack, or equjvalent, will be placed in the annular space =098 tha satire <br /> scramed interval, sad will e=d approximately, 2 feet above the top of the we= for the <br /> well. A 2 to 3 foot bentonite tasxtion seat will be placed atop the sandpa,cl,and a Portlmd <br /> 910-017.SA/wRKFGN AI-1 July is,Igoe <br />