Laserfiche WebLink
TMAWmr <br /> a <br /> Problem Assessrnent Report December 5, 1989 <br /> USA Petroleum ,station No. 65, Lodi. California AGS 87050-3 <br /> of TVH as gasoline in samples from MW-1 were within 0.01 ppin of the 1987 concentration. <br /> Results indicated the concentration of TVH decreased in NtW-2 from approximately 0.11 <br /> ppm in 1987 to 0.04 ppm in 1988,and increased in well MW-3 from .0509 ppm to 0.66 ppm. <br /> j <br /> �1Gtaxa nrl!.ar;€t€y s irad`a ted-tha water:aample's `dllectecl-:4r" t tla -#owngrstdient well <br /> '. IpIW-3)sshowed tncreasedYcnncerttrat� ns of benzenec ofuene: and lo(al I�rtr iso erg <br /> vinct't,�id-1987 satripjiffj''';'7' results of this sampling event were presented in our Letter <br /> Report of Quarterly Ground-Water Monitoring(Applied GeoSystems,November 10, 1988) <br /> and Appendix B of this report. <br /> i <br /> f Based on the data of increased hydrocarbon contamination found in well MW-3, USA <br /> requested that Applied GeoSystems write a Work Plan for two offsite wells. Applied <br /> r !!� GeoSystems proposed the installation of wells MW-4 and Ni W-5 to delineate the limits of <br /> a <br /> groundwater contamination around the site (Applied GeoSystems, November 4, 1988). <br /> After we installed wells MW-4 and MW-5, USA requested that we obtain permits for twos <br /> additional offsite wells (MW-6 and MW-7) to further delineate the limits of ground-water <br /> a <br /> contamination, <br /> ----. ----- -----. -- -- <br /> �s <br /> 10 <br /> { <br /> g I <br />