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<br />Mr. kodn~}~ Schurznan <br />Cit<~ of S;:n Leandro <br />22 September ?.003 <br />Page 3 <br />L~~~SORATO~'~ 'FMS"i'IN~ <br />Artal,yticat Laborator~~ Testrirg <br />Representative s~~mples from the 7? borings were conlposited into four san2ples aid tested for the <br />follo~~iuG: <br />• California Title 22 metals (CAM 17) using EPA Tast Met)aod 60]0 and 7000 series <br />• semivolatile organic compounds (SVOCs) using EPA Test Method 8?70 <br />• or~anochlor~ine pesticides and polychlorinated bipheny?s {I'C~3sl using ;/Yr1 Tc;t Method <br />8081 <br />• total petl~oletun hydrocarbons cluanti~ed as gasoline (TPI-I-g), diesel ("1'PI-I-d) and motor <br />oi] (TPI-C-mo) using f;l'A 'hest Ivlcfhori 80l 5M <br />• p~-I using. EPA Test Method 904. <br />The analytical laboratory test resl~~]ts az~e surrunarizcd on Tables 2 and 3. Based ou the results of <br />the total concentration of Title ?2 metals, w~ did not perForzn tests to assess soluble <br />concentrations of tf~e Title 2? metals. <br />Ccatca;hnical 1laborator•y 'Test>iY~ <br />Geotechnical laboratory tcsti.7g ~~as perforn7ed on selected representative soil samples to <br />mea-sure moisture eonteiat, dry density, Attt;rbezg limits (Ialasticity), fines coiatent, compactio» <br />}properties, and pernlcability (on remolded samples). Laboratory test results for ~~oisturc content, <br />dry uerasity, and fines content are presented in 'T'able 4. Attcrber~, limits and corx~pactior~ test <br />results fire presented on higures ~ tlv~ouc.~ C. Laboratory test res~.llts for remolded pern-ieah;li?ies <br />arc presented in Talple ~_ <br />Sr'~'G ANl) 5UX3~CITZT~~CL ~;ONI>TTi~h'S <br />The site is blr~irketed by 1.0 to 3.~ feet o~f dredge material that consists of high-hla5ticit}~ cl~~~~. <br />Tl~c upper- 1/2 to 1 foot of the dredce r,~a[erial is dry to moist and stiff to very s~ifFdl_ie to <br />desiccation. The underlying dred~re material is ~euezall~~ soft and wet. Dative, marsh deposits, <br />consistin of so:~"t to zr~cdiuna still, ~~~et clay, l~nderli~ the cir~dge material. <br />hesiccation cracks rangil~R from A l0 18 inches in ~.~-idth anti C to 40 inches in depth were <br />~bscrvcd durinn our f eld investif~at~or_ Tl~~c distance bctweci~ ceilt~rs of desiccation c; acres <br />