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MNINI <br /> LABORATORIES, INC. JC- <br /> ANALYTICAL CHEMISTRY•ENVIRONMENTAL SERVICES <br /> GEOTECHNICAL ENGINEERING-SAMPLING SERVICES <br /> CONSTRUCTION INSPECTION l MATERIALS TESTING <br /> June 1,2001 1334604.01c <br /> Ms.Kitty Walker <br /> City of Stockton Redevelopment Agency <br /> 305 North El Dorado Street,Suite 200 <br /> Stockton,California 95202 <br /> Re: Work Plan Amendment to Conduct Additional Sampl ag <br /> Site: Gleason Park Properties(300 Block California Street) <br /> 300 and 328 California Street Stockton,California(site) <br /> Ms.Walker: <br /> The Twining Laboratories,Inc. (Twining)has prepared this Work Plan amendment to conduct <br /> additional sampling and analysis for the Gleason Park Properties in Stockton,California. This <br /> sampling plan includes a brief description of the site and proposes the number of soil samples and <br /> locations,and the constituents to be analyzed. The purpose of thiii additional sampling is to define <br /> the vertical and lateral extent of the lead impacted soil identified at vo separate locations during the <br /> Phase 11 Investigation conducted by The Twining Laboratories,li ic.(Twining)in April,2001. <br /> PROPOSED SAMPLING PROCEDURES <br /> 300 California Street: <br /> Additional soil samples will be collected to the north,east,and west of sample HA-2 at 1,3,and 5 <br /> feet below site grade(BSG)(see Drawing 2). These soil samples dentified as HA-12,HA-13,and <br /> HA-14 will be analyzed for Total Lead. (Note:Ifelevated concent ations oflead are detected in the <br /> samples a Waste Extraction Test will be nm on the sample. <br /> The soil samples will be collected by first hand-augering to the selected depth and then driving a pre- <br /> cleaned stainless steel sleeve into the target depth. Samples will be sealed with Teflon tape and <br /> plastic end caps,labeled,placed on ice,and delivered to a state certified laboratory,along with <br /> chain-of-custody documentation. <br /> The information obtained from this additional sampling will be con ibined with the information from <br /> the original sampling during the Phase 11 investigation to assess the vertical and lateral extent of lead Q D <br /> impacted soil detected in sample HA-2 during the Phase II Invest gation. <br /> CORPORATE OFFICE MODESTO VISALIA 13SRELO MONTEREY <br /> 247 Remo SVM 4260IGenun A,/IGE 130 NoM Ke SL,/H6 9G,P <br /> I32 egituOlm.nM 4JusYnCoinsuiMO SA•nl <br /> Fraero,G43T21-1604 Motl 1050'FILISAP3 VualiA,Ga4291 93JG 61)) N,GS]305GB4T M ItwG9PW JOpkQ�itN A <br /> (569)266-7121•Fu 266)126 (2041548-1G5G•FU Sebt14T (5541 bS1d360•Fu 651-az45 (Een 39}SO65•FU GS}46U �3, '_'r <br /> 164,1306„6G ,'rCDNIN��[t't <br /> MISSION <br /> j 3Cf E.WeberO s i riird Flour <br /> F'.i>. :,i::< <:t, stui'c nr,, CA 95201-0388 <br /> Phone: (kWll 48a-;420 <br /> AVMS <br /> ( hsrtncp: Sea Remarks <br /> c t; ' Y'r :k3 <br /> Ft')eS(5 ;J?^n,ns extends only, to that <br /> ;c;Ruil acid desciibed hereon but <br /> ;'tat ay.Jthorize or a !iprove any om's;.,n <br /> of re quiremerits GP Stain laws W <br /> :Droinancos. <br />