Laserfiche WebLink
GRANITE CONSTRUCTION FACILITY <br />' WKA No 2088 08 <br /> August 18, 1999 <br /> Page 9 <br /> SUMMARY OF WELL SURVEY DATA(cont) <br /> yt `t y �^ r-�, � ?$h <br /> W f ,cs € EAPPTOX1InAte,DlstBticvand t <br /> �y Well Owners Well, T�ta s Screened Int e h , g x d ,, <br /> Fara ��QCatIo11"� E3> u4:f< Q �`+: fa erval fl vt -i p PrP-�x`�" r <br /> dt° ts�x3�E E�"' Glal 151 E <br /> <�:s § 3 t1Pn WC1I(S} 7xb <br /> till`" `fd:F �s ' k`'fr.4.�i`r`+r'F;'f# `^ '�� 3$a,u t'k , <br /> eP i t*1� ��� ��4 tb �- <br /> €� ¢ �gl >. With ReS ectst(lle.�L� <br /> t a s r t y rr l Ali ��9 P r 1 <br /> r �, "" �,s'` E �rz S fr �f�taR ;- _i j kz ,3 `e <br /> i I rangy aj"6'1iiE 9' a, _sF i � W w e-, � � �� " a 3r�.?nP„ � � t,'-� S `r3�4� ^.�-,.�'4�s' „� ���,.� �.�d:�"��r'$�"$� t <br /> Manuel Sarolia Watters Road 122 NA 1,000 to 2,000 east of the site <br /> Del Auch Const Co 10754 Wayne Court 140 128 to 140 1,000 to 2,000 east of the site <br /> Del Auch Const Co Wayne Court 156 144 to 156 1,000 to 2,000 east of the site <br /> Copies of the Water Well Drillers Report, State well numbers, boring logs and well construction <br /> details are provided in Appendix B <br />' Mass Balance Calculations <br />' In addition to the Risk Based Corrective Action Evaluation, the Fate and Transport Modeling, <br /> and the Sensitive Receptor Survey, we performed detailed mass balance calculations to evaluate <br /> the volume of contaminants remaining in soil and groundwater beneath the property The <br /> calculations were completed using EPA accepted weighted statistical analyses methods (U S <br />' EPA, 1992) The assumptions used to estimate the volume of contamination in subsurface soil <br /> and groundwater are highly conservative and included the following <br /> Impacted area <br /> • approximately 7,500 square feet of contaminated soil in the vicinity of the former USTs <br /> • a twenty six foot soil column was impacted <br /> • an average contaminant concentration was used throughout the entire impacted area <br />' Data <br /> • results of laboratory analysis of soil samples obtained from the bottom and sidewalls of the <br /> former UST excavation and soil borings drilled in the vicinity of the excavation <br /> • samples reported at non-detectable concentrations, actually were included at contaminant <br /> concentrations equal to half the detection limit (i e a sample reporting <0 005 mg/kg benzene <br /> was included in the mass balance calculation as having a benzene concentration of 0 0025 <br /> mg/kg) <br />' WALLACE KUHL <br /> Recycled[-trey Gr ASSOCIATES INC <br />