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. r.,. 0008/013 <br /> Jerry the Page 3 <br /> February 2,2005 <br /> ADDITIONAL DOCUMENTATIONIDATA NEEDED <br /> 1. From the City of Stockton -Data detailing former, If available,and current <br /> underground utility corridors (primarily sewer and water)In the apartment area and <br /> in the undeveloped area as well. <br /> 2. The "thorough underground utility search" re.suWrepo_rt conducted/prepared prior to <br /> SECOR's January 9,2004 trenching. <br /> 3, A comprehensive map Identifying locations-of all samples. in particular, MW-128, <br /> MW-12-2A, MW13 2A, MW14-2A,,and MW15-2A,are not depicted on the site map <br /> (Figure 1)In the HRA. <br /> 4.. Analytical data from the-undeveloped area which was found to contain many <br /> underground pipelines. <br /> 6. A map identifying locations)of sheen andfor non-aqueous phase'liquid (NAPL) <br /> layer. <br /> 6. OVA results and boring logs, which presumably have notations for visual signs of <br /> contamination, <br /> -7. As previously requested in our February 6,2004 conference call.identify whether <br /> the soil sample results are reported on a-wet weight or dry weight basis. For risk <br /> assessment purposes soli data are preferred on a dry weight basis'. <br /> 8. Submit the quality assurarice1quallty contral (OAIQC)reports and chain-of-custbdy <br /> forms. <br /> 9. Define all qualifiers used In the data tables using footnotes;use standard data <br /> qualifiers as-defined by U.S.EPA(U.S. EPA, 1989,1992The results of soil vapor <br /> analyses do not define all the qualifier6,such as'Wd. Footnotes for soil VOCs do <br /> not define all the qualifiers, such as"J+4Kc". Footnotes for the Results of Soil <br /> Analyses for Metals and Chemical Parameters do not define all the qualifiers, such : <br /> as"J-M". <br /> 10.The soil vapor data quallfier Jc used with vinyl chloride states that the result was <br /> estimated due to a calibration Issue;submit information as to whether vinyl chloride <br /> was above or below the standard curve as requested during our February 5,2004 <br /> teleconference. <br /> 11.Include'dates of the Isst soli wetting episode (rain events and landscape Irrigatlon) <br /> prior to soil gas.sarnpling and prior to collection of soil for site-specific geotechnical <br /> characteristics. <br /> 12.GROUNDWATER <br /> a. -Identify and segregate groundwater analytical ohs M* istry data for the upper and <br /> lower portions of the aquifer, <br />