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<br /> } 7 November 1995 ,, , }
<br /> AGE-NC;Prod ect No:-,95-'01 14i ; !!
<br /> a ` Page 3'o 6;
<br /> third boring be drilled.,in the'sidewalk'alorig the south side of Harding Way;'nortti:oftlie site
<br /> This horing;will be drilled'to the vadose zone/groan' ;water interface: A grab ground r titer sample `<
<br /> ` will'then'be collected using.1 opunch or similar hod: `l'he-sample will be field screened for:the ' f
<br /> presence of organic va oi=s using a photo4onizatiL z ec'tor'.. If fi.eld'screenm' does not indicate-the
<br /> pre'sence,ofhydrocarbons','the boring will:cornplete&as a ground 'Water monitoring well. :However`,
<br /> ifcontamiriatlon is encountered in�ilie,field;'the boring will be'backflled to thesurface'witliPortland
<br /> "c&nr eni_Ari additional-bofing'wili then be drilled in the sidewalk along-the north side of Harding Way
<br /> and'completed as'a•ground, water monitoring well
<br /> ,.
<br /> Each-boring,will'be advanced utilizing a truck mounted,=hollow stem drill rig w,
<br /> and 8.25-inch-hollo -
<br /> stein augers.. Proposed of-the boring/monitoring wells are illustrated in Figure 2.`Monitoring =
<br /> welP'design is'illustrated-in Figure 3.
<br /> Soil sarfi les will be collect6 at,five'loot intervals be iniiii� at 10 feet;bs in each bori�i Samples' :
<br /> L' b . g , . g
<br /> will be collected using.a'Califoiriia split-spoon sampler and brass sleeves. The sampleiyi11 be driven
<br /> by dropping a 140-pound vurightfrom,a height of X.hiches. The number of blows.rer�uired to driire
<br /> each 6-inch length.of,the sampler (blow counts) are to be recorded on the boring logs by an-AGE
<br /> staff geologist,. Upori sample.retrieval, the middle brass,sleeve.will be,removed from the sampler.
<br /> AR, The ends of.the sleeve-►vill,be immediately.covered with Teflon to i or aluminuin sheets',sealed'with
<br /> plastic end caps;seciired.with tape and immediately-placed in &chilled container for tr'anspc*tatiori r
<br /> to a State-certified labora-tory.,Each sample sleeve will be labeled with the following: boring location;; ~
<br /> r depth, tirne,'date and sampler's initials:
<br /> 3`2., EQUIPMENT DECONTAMINATION
<br /> ;'a' All sampling tools and brass sleeves used-,tor saniplecollectior.-will be thoroughly-ringed with clean
<br /> water after washing.with a solution of Alconox.n''All,hollow stem augers are steam=cleaned prior to.
<br /> advancement in each'borehole.V
<br /> LABORATORY ANALYSIS
<br /> : .;$elected soi[and grodnd mater samples will he analyzed for_total petroleum hydrocarbons quantified
<br /> as stoddard- solvents. (TPH-ss)`and BTE&X in 'accordance` with EPA, thdthods 8015/5030 and.
<br /> 8020/602,-.,•espectively. Laboratory.reports of both soil and ground water analyses,-testing methods;
<br /> ,laboratory quality assurance/quality' control (QA/OC). reports. and' sample' chain":of custody
<br /> docurrientafion will.b�e.presented in a report with.the.findings and'recommendations.
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