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T <br /> . Ti '+� � r .fir• +. , lw '"'[ 'I.+�.F iYJ1. e s6 €r' _ -F6 ..'a 7.M1 rws:w"' �.:AY.Fe �C -' a ., �t,`, <br /> m �,a <br /> � -.t.+�`i s F W� �!,.� Yq'� .� �� � G>��' _�.�'.�N �"i.'�. ����.C'� � ,�, � t^�� ��.P. r '�� '�`' r.a"� i��+��° �M �:5= o-�'_+ '!• <br /> x. <br /> nraximately one foot. The lower half of the clay <br /> distance of ap. orted by an additional 1.5 feet of concrete: <br /> pipe was then supp laced <br /> No visible breaks or cracks senceeotherclay1pipeewaspnot replaced <br /> o€ the clay pipe. However, portion of the pipe <br /> by stone Brothers, an examination s supported byaconcrete was not <br /> that was encased in or was supe <br /> possible. <br /> Two slant borings were drilled around the sewer line using <br /> 5 feet <br /> hand auger. <br /> Commencing near the base of the clay pipe (2. <br /> ted <br /> bgs) , boring SB-1 washanTwo oil <br /> usdsamplesalcs5ulaand SS-21were <br /> depth of 5.75 feet bsat a depth of 3.5 and 5.5 bgs, respectively <br /> collected from SB-•1 <br /> (see Figure 3) . Commencing i.n the sidewall of the excavation <br /> estimated <br /> o an <br /> (1.5 feet bgs) , boring SB-2 was hand terminatedd approximat'elY <br /> depth of 4.75 feet bgs. This boring <br /> beneath a second seds line that xwaswcollectedtat the <br /> hole <br /> (see Figure 3) . A soil camp <br /> (SS-3) <br /> les were collected using <br /> termination of this boring. All same <br /> two 2.5-inch diameter by 3-inch long brass tubesAttertsample�n <br /> covered with <br /> a samplei connected to a sliding drive hammer• <br /> recovery, the ends of the lowermostc caps tuberwer ends. Prior to <br /> aluminum foil and p <br /> ent <br /> use, all tubes were washed in a Alconox <br /> distilled <br /> and tap water, rinsed with tap water, <br /> water. The samples were labeled with the sampleDint <br /> individually <br /> identification, d;,,te, time and depth interval, laced into an <br /> sealed in °Ziplacplastic bags, and immediately p <br /> ice chest chilled with crushed ice. The samples were kept <br /> the the laboratory were logged on <br /> chilled until delilesedeliveredltooratory for analytical <br /> testing. All same Appendix at <br /> chain of custody record forms (see App <br /> a Bacharach TLV sniffer calibrated <br /> After sample recovery, <br /> against a hexane standard was used on soil cdeberminelifthe <br /> second tube from the bottom of the shoe, <br /> volatile hydrocarbon vapors were anaairtightnating l°Ziploc"rplastic <br /> soil. Each sample was placed <br /> bag. The samples were allowed t,, sit in tthesTLV sniffer. the <br /> head space in the bags was analyzed using s (see <br /> results of this testing were recorded on the boring log <br /> Appendix B) . <br /> PRODUCT LINES <br /> 2.2 INVESTIGATION OF <br /> N <br /> s were hand <br /> tember 12 and 13, 1991, twelve slant baring <br /> Sep les were collected along the product lines <br /> 3ugered and soil samples <br /> TJST <br /> that extend betweeureh3 for Cammancin7mer fuel satntheabasehofftheer <br /> locations (see Fig ) • s were <br /> th of approximately four feet bgs. <br /> concrete or asphalt surface, the twelve slant borings <br /> augered to a termination d,-p <br /> -3- <br /> project No. 1232 ENV11i0,VjvE11TAL AUDIT,INC <br /> s <br />