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�,2,.�fFJilpfJ� <br /> ,"well bolingt and soik;Irnpling will be petfarmed under the direction of a Melts enginrer or}Itoleilitl. <br /> The tail borings will be advanced utinpl a truck-mounled drill rig utilitina hallow-stem augett <br /> To reduce the chances of cioti-contamination tw1ween borchole.s,all down-hole drilling er,4pn,tnt <br /> will be cleaned NI"ren tssrin¢s, To reduce crott-contamination between sxmplcs. the aptit-patirt <br /> sampler will be washed in a taap solution ancf double tinted between each sampling event. <br /> Soil sampling will be done in accordance with ASTM 1396-94. using this prate=lure, a lun•irch <br /> O.U.split-barrel:ampler or a two-inch 11D.California-type sampler is driven into the irsil by r 140. <br /> pound weight falling 30 inches. After an initial set of sk inches, the -lumber of blows ;rrluiiei! to <br /> drive the sampler an addilional 12 inches is i~;nown as penetrati r rcr-Itanca,or Ilse't. ti,alue. The <br /> N value is used as an eenpirkal measure of the relative 1;1;' sahetiontrvi sails and the <br /> consistency of cohesive soils. <br /> Upon recovery, a po:tion of the soil sample %jil br glaTv jir and tmra , r later <br /> screening with a porlabla pholcioniration detrs4•sr. r- , p -,;,W r of the soil sam;klr k . he uteri <br /> for ciassification and description. That part of ;he wV>.m ;s c-i1ic,'ed It, brat,, =''s w ithin the <br /> California-type sampler will be stored at npr ox+s.rately 40C for winsvN't 's tare iatx"at..ry. <br /> ,(,,Z,�,I�f s tel f lea ftp <br /> As the samples are obtained in the field,the •gilt cla;. !•-d t- a 9rulcw_'itlengincer in accordance <br /> with AS'MM 2499-84. Rrptcr ►imivc pe'Riw 4 C.e s:ln;:e wiii then be returned to the <br /> laboratory for further examination and for v rifi�er:)n of tls.a i v1d classification. Logs of the <br /> borings indicating the depth and identification of the v.'-nous strata, the N value. w°atcr-level <br /> information and pertinent information regarding the method of maintaining and advancing the bort <br /> hole will be made. <br /> After soil-sample jars have been brought To$win temperature,The head-space vapors of the soil- <br /> - sample jars will be screened with a portable photoion4vion detector equipped with a 10.2 rY lamp <br /> calibrated to benreae for direct reading in parts per million[ppmjl.The sample-lar lid will h-€nrenrd <br /> ---------- the pt bf o in m diately p4crd within the brad ap re of Th. 'ifie higfs#`sraWt+r`ecf tcading --- <br /> will tet rrded, <br />