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<br /> I February 2002
<br /> ProjectWo .95--'0 1 14
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<br /> FIELD
<br /> - PROCEDURES,
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<br /> All field procedures will be oyerseen,by'an AGE"representa'tive under the'supervision of a California
<br /> Registered Geologist. Procedures.for-soil and ground water"sarnpliiig'are described below
<br /> 4:1: , CPT SOIL BORINGS
<br /> At'each borin location one CPT soil witl be 'advariced to a total.-de-.-dept of 150,feet bs
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<br /> utilizing a 25-ton truck-mounted CPT drill rig equipped with 2-inch diaix�eter hollow=stem rods. The' „
<br /> soil boring will utilize a hydraulic ram:to advance a cone-penetrometer to the desired depth: Soil i.
<br /> parameters',such_as cone;bearing, sleeve.friction; fi-iction ration and pore water pre§sure wil.bbe' ,}
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<br /> measured as the cone penetrometer is advanced. kihseate generated as part'of the drilling activities ,
<br /> will be containerized in properly labeled DOT-approved 55-gallon drums and stored ori=site in an area :
<br /> lacking public access.Disposal alternatives will be evaluated at a later date based on laboratory results
<br /> of rinseate sarnples. ;
<br /> ,-A second soil boring will be located no more than three feet=from the fust CPT boring for,soil and
<br /> •' ground'water sample collection. 'Based on.CPT. findings; discrete soil samples may be.collected,at
<br /> varioilsdepths between,50 and'l 50 feet bsg based.'on significant lithologic vai iation:'Soll samples will
<br /> be collected utilizinga 2-inch diameter piston soil'sampling'assembly loaded with pre-cleaned brass.
<br /> sleeves. Upon soil.sample retrieval, a brass sleeve dill be removed.from the samplen'-The ends of the
<br /> • brass sleeve will.be immediately,covered with Teflon or alu'=i um sheets, sealed with plastic end' "
<br /> caps, secured with tape and immediately placed in a chilled container`foitransportation to,,a,DHS- _: r
<br /> cez ti,led laboratory: Each,sample sleeve,wiltbe labeled with the locat'ri;boring designation, depth,' ;
<br /> r time; date.and,sampler's-initials.
<br /> Soii'sample' duplicates will be monitored for the presence,of organic;vapor using a=photo-ionization'
<br /> detector(PID:.Thermo Environmental 580A, 10.0 eV,calibratedto is'obutylene)'and:the readings will
<br /> be recorded on boring logs.-Soil sample duplicates will be-visually described using the Unified,Soil
<br /> C. ,lassification-5 stem(U. SCS)-and.the;descri ti,orns will_be recorded on the baring logs.., ,, .. w
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<br /> 'Grab ground water samples will be collected from within 2-inch diameter hollow-stemrods'equipped
<br /> with a four-foot, extendable 0.0'i-inch slotted PVC screen. Grab ground watersainriples will be
<br /> collected_in selected intervals ofsaturated porous-and permeable'material. The screen will be exposed.`
<br /> at the selected depths and a stainless'steel-bailer,will be used io..retrieve'the water samples. Ground
<br /> S .water samples' r�appropriate•EPA�analyses will'be collected into 44=m1 volatile organic analysis;
<br /> (VOA)_ vials containing 0.5 Tnl of hydrochloric acid as apple preservative. ti
<br /> After collection,-the saxnples•will be.appropi•iately labelled,dnd placed on ice and kept in.a' cooler until
<br /> delivered to the laboratory for analysis:Chain-of-custody protocols will b&'used,to docunrrent sample
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