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I� 1 <br /> 1 { <br /> 1 <br /> ri <br /> ' 4 <br /> IIS <br /> I <br /> i <br /> N <br /> 08 November 2000 s , <br /> AGE;NC Project No 95-0142 <br /> i r <br /> F <br /> Page 4 of 9 m , <br /> Z3 ..c{a�' !� <br /> -- 5 - <br /> the estimated <br /> E ual Elevahon'of <br /> Joaquin County Flood Control Distract and W ater C Rev ew of tuZ he t-'m--a-p-ric (L Lines of CD), <br /> de icts'the regional ground waterflow direction towards <br /> depth to ground water at the:srte�to be 30 feet bsg <br /> Groundwater Spring 1998.(F_CD&WCD 95 andreurr--t depth to ground water measured from wells <br /> the northwest and.west.Between May. 4 s round water from 50 feet bsg to 25;feet bsg,with <br /> rk <br /> on the site have shown an-increase. the depth to g <br /> orfs re tired by <br /> AGE <br /> a general ground water flow dt ectiontow ed us Qus r d R p heaspt Around water elevation <br /> contour,ma s for the site were hncludedtm p <br /> p w g <br /> t ' i rW <br /> '1 estsahat ground water depth near she site has fluctuated <br /> Review.of previous ground water moivtonng at the site and historical depth to groom d water maps <br /> - - datin back_to 1971 sugg _ - <br /> =: <br /> (FCD&WCD) g <br /> between 60 feet bsg _ a <br /> _ 30 SCOPE OF,WORK <br /> Kry N 1 <br /> - -The scope of the work includes the installation_of ground water extraction wells, performance of aj r <br /> • ground water extraction pump test; analysts of grab water samples.and soil samplys,to apses teal { <br /> - extent:of impacted media, and analysts of selected soil samples for pern?eabtlrt and orost <br /> _ s s <br /> Two ground water extraction'wells should be installed at the�southeastern corner o£the former UST a' <br /> = area and directly down-gradient,fifteen:feet from the known hydrocarbon release, also in the area oft - <br /> _ the highest concentration dissolved hydrocarbons pump test=at a nearby site having s�mtlar soil _ <br /> compositions yielded a radids`R•influence of approximately 1'6'to 17 feet at a pumping rate of 13 <br /> gallons per minute(reported by'FAGE n Cored 15 Feberu n 200)eThe pulmpest al��at ons fo�he <br /> Hazelton Avenue Stoekion Cahfor-nia, dat _ _ F — _ <br /> Sierra Lumber site are included in Appendix A of this report <br /> Field=test activities will consist of the following tasks_ _mss , <br /> - w- x { <br /> Permtttin and= re field work activrttes, <br /> g P r <br /> -'- `Drilling soil sam_phtlng and well installation/development ,- <br /> Y k _ 5... <br /> Laboratoryanalysts fjsotl samples, <br /> test, and' <br /> Pump= _ — <br /> r <br /> _ •= Properly storing and disposing of produced ground water <br /> F <br /> c = <br />" <br /> } 3 1y - ;� �r .,�� vaned Geo nvironrmental Ine i <br /> � � Ad <br /> - T AtPoanced GeoF nvi ronmental ]nc X <br /> y e <br /> ZE <br /> w . <br /> z <br />�. -N-a :3= _ X8+11— W.—am...— .� .� �E•+'S'tiP ! <br />