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September 30, 1999 <br /> 47491 1 Harding Lawson Associates <br /> Margaret Lagorio, Supervising REHS <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> Page 7 <br /> Compilation of Monitoring Well Data <br />' This report also presents a compilation of historical monitoring results from the four monitoring wells situated <br /> around the former UST location (Plate 2) As previously discussed in detail,these data strongly support the <br /> conclusions of the HLA reports (HLA 1988b and 1998c) cited above, that the remaining impacted soils do not <br />' pose a threat to groundwater quality at the Newark facility This includes the results of four quarterly <br /> monitoring events performed subsequent to the UST removal operations Based on these additional data.,HLA <br /> recommends that no further action be requested for the two investigated areas at the Newark facility <br />' If there are any questions, please contact either of the undersigned <br />' Yours very truly, <br /> HARDING AWSON ASSOCIATES <br /> No 6446 <br /> Gary Haeck, Ph , R G 6 <br /> Senior Geologist OF C <br /> Grego L i RG <br /> ano, <br /> ' Managing cipal Geologist <br /> Attachments Table I -Historical Monitoring Well Data <br /> ' Plate 1 - Site Vicinity Map <br /> Plate 2 - Site Plan <br /> Plate 3 - Courtyard Site Plan <br /> Plate 4 - Cross Section A-A' <br /> Plate 5 - Cross Section B-B' <br /> Plate b -TPHd and TPHrno Concentrations Map, 2100,00-gallon UST Removal Project <br /> ' cc Mark Vincent—Newark Sierra Paperboard Corp <br /> Mark List -RWQCB <br /> ' FD/GDWGLF/tb/L1400001474911WP147491v15 <br /> t7r <br />