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f TAIL 1 - CHECKLIST OF REQUIREd TA
<br /> -'FOR NO FURTHER ACTION REQUESTS AT UNDERGROUND TANK SITES
<br /> Site Name and Location: Atchison,Topeka&Santa Fe RR Site,748 S Union Street, Stockton, San Joaquin Co..'
<br /> Y 1.Distance to production wells for municipal, domestic, agriculture, industry No offsite beneficial use impacts,
<br /> and other uses within,2000 feet of the site; according toISJC-EHD.
<br /> U 2. Site maps, to scale, of area impacted showing locations of former and existing tank systems, Site maps,not to scale, .. ,
<br /> excavation contours and sample locations, boring and monitoring well elevation contours, which show general location
<br /> gradients, and nearby surface waters, buildings, streets, and subsurface utilities; of soil borings and tank
<br /> excavation boundary.
<br /> 3.Figures depicting lithology(cross section), treatment system diagrams Boring logs included from the 22 July 1997;
<br /> soil boring program. Little info.provided.
<br /> 4. Stockpiled soil remaining on-site or off--site disposal(quantity); No indication of any overexcavation orso!l disposal.
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<br /> �5. Monitoring wells remaining on-site, fate, No monitoring wells were ever installed.
<br /> 0 6. Tabulated results of all groundwater elevations and depths to water, N/A-no groundwaterinformation collected. ,
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<br /> Y 1 7.Tabulated results of all sampling and analyses:
<br /> Sample information was provided from the laboratory,in tabula
<br /> n Detection limits for confirmation sampling format, with detection limits. Not sampled for lead.
<br /> nN Lead analyses
<br /> 8. Concentration contours of contaminants found and those remaining in soil Soil contamination was encountered
<br /> and groundwater, and both on-site and off-site: during the UST removal,hoever, follow-on
<br /> Lateral andFYI Vertical extent of soil contamination work did not confirm the presence of any
<br /> contamination.No mass left in place talc,
<br /> Lateral and a Vertical extent of groundwater contamination or estimate of total release was completed.
<br /> NA 9.Zane of influence calculated and assumptions used for subsurface
<br /> remediation system and the zone of capture attained for the soil and
<br /> groundwater remediation system;
<br /> Q10.Reports/information ❑y unauthorized Release Form a QMRs
<br /> El Welland boring logs Q PAR FRP a Other(report name)Limited Site Investigation Services
<br /> ._ I .11.Best Available,Technology:(BAT)-Used.or an explanation for not using.BA.T;z remediation appears to have taken place
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<br /> x Low concentrations of T0Hd fi soil r"
<br /> NA 12.Reasons why background wasris unattainable using BAT,-
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<br /> 13,Mass balance calculation of substance treated versus that remaining; No Mass balance calculation was performed on,
<br /> soil contamination left in place t
<br /> NA 14.Assumptions,parameters, calculations and model used in risk
<br /> assessments, and fate and transport modeling;
<br /> 15.Rationale why conditions remaining at site will not adversely SJCEHD believes this is a LOW RISK,Soil Only Case �I
<br /> impact water quality, health, or other beneficial uses;and
<br /> NA 16.WET or TCLP results I`
<br /> By: comments:Comments:Although the site characterization activities at the site were extremely limited, the low
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<br /> concentrations of TPHd and other constituents in soil, at the time of the tank e'zcavation, do not pose a
<br /> Dalte, significant threat to water quality. Benzene ND for all samples analyzed. This does apear to be a low risk
<br /> $ 3 9$ soil only ease, with low concentrations of TPHd, toluene and xylenes, in the tank pit area.
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