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, <br /> 23 <br /> May 2001 <br /> AGE-NC Project No 95-0144 <br /> Page.3 of 8 <br /> I <br /> Additionally, samples were co]lec'ted from <br /> containing no preservative and shipped to A Keith <br /> MW-21A g ufinan (AKK) B into 1-liter amber bottles' Y <br /> physiochermcal and microbiological analyses (AKK} of Culver City, California for <br /> 2 4 INSTALLATION OF GROUND WATER EXTRACTION WELLS <br /> On 14 March 2001, two pilot soil bona s EW-1 <br /> installation ofground water extractiong ( and EW-2) were advanced to 37 feet bs ' f <br /> advanced using aCME-75HT drill ri wells equipped <br /> with Ormer sie hQ 8 location' The soil borings were <br /> ng, q ppe ; <br /> advance boring EW 1 and 8 25-inch diainter hollow-stem augers to dvance borinh011Og EW-2augers to <br /> rig and three-man cre�r were supplied by Mitchell DnIlnig Environmental Auger returns generated <br /> dnll ' <br /> by d.nlling were stockpiled on-site within plastic sheeting, pen�g laboratory g erated <br /> ' ry analysis <br /> - Boring EW-1 was completed as a four-inch dzameter ground water extraction well,completed as a two-inch diameter ground water extraction well Both utilized PVC cis <br /> 1, ESV 2 was <br /> 0 020-inch slotted screen installed from approximately 37 feet to 12 feet bs and mg with <br /> extended to the surface The filter pack (No 3 Lonestai sand) was installed fi om 1 <br /> g with blank casmg- <br /> _ approximately 10 feet bsg A noimnal2-foot bentonite chi lug w 2 feet to <br /> pack and hydrated Portland cement was used to backfill the remaining wthen installed above the,filter <br /> to 'ear surface grade Water-tight, traffic-rated well boxes were then installed over the wells annular space of the boring <br /> built well diagrams are illustrated in Figures 4 and 5 s As- <br /> 1 <br /> 2 5 EXCAVATION OF HYDROCAR_gQN-IMPACTED SOIL <br /> On 2 I <br /> 1 March 2001, approximately 110 cubic yards of petroleum hydrocarbon_unpacted sod <br /> 'were <br /> from the forrrier UST No 1 {waste ail} area Excavation was performed b Stockton j Service Station Equipment Company using a.backhoe Y kton <br /> Excavated soil was screened for the presence of organic vapor using a using an <br /> r (OVM) equipped with a photo--ionization deteermc) g organic vapor meter <br /> calibrated to isobutylene) Based on OVM reading and field observations,nal 580A, 10 0 eV, r <br /> segregated into clean soil and impacted soil, olaly soil exhibiting hydrocarbon odor excavated isoil was <br /> OVM readings were stockpiled for transportation and final dispos _ <br /> able <br /> 3 � <br /> l <br /> I <br /> t <br /> Y <br /> �ldvanred Geo�n�iranmentai,iris 9 <br /> t <br />