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FEB-18-99 THU 10:05 AM . P. 02 <br /> FEB. -I1' 99(THU) 13:20 UNOCAL k: NORTH R£ TEL:510 94 '$1 P. 016 <br /> ORA, ' <br /> 4. Petitioner's site is located in a cornmercWicsidential arta. No water supply <br /> wells are locates# within 900 feet and the nearest Sulfa"water is about 2,Q00 feet &an the <br /> Site. <br /> S. Current water supply welt in the vicinity of the site ism constructed with <br /> sanitwy seals which extend to depths of I50 to 2w feet below'ground surftce fur the <br /> purpose of wwIuding poor quality shallow gra mndwow any fitture supply wells which <br /> may be=Wrutted in the vicinity of the site will in all agfihood be siutiLar "insamrted- <br /> 8. Additional sod cad water remediation at prdtionet's site is not tacessaiy. <br /> 7. The lural of site cleat is consistemd with the mem benefit to the people <br /> of the state. <br /> 8. Given the adverse technical and ecotror k implications statewide if futthet <br /> catree6ve action was required, and the mftdrsral be scrim if azzy,that would be gained by <br /> further cotrecti m actives, it is riot fW=Ue to attain bacicground water quality at <br /> petidonce s sift. , <br /> 9: Detectable concentudow of'SIM in shaIIow groom is contact with the <br /> limited residual pauuk=hydrocarhoas admbed to sod particles may remain above <br /> MCLS and taus violate the Basica Plan objectives in a very localind, small volume of <br /> surTounding grvwndwater for decades. <br /> 10. Detetsabie cowmVatims of TPfI g in s�aI OW ffWadwater in contact with <br /> the hmited r=dual petroleum hydrocarbons adsorbed to soil particles w%K ldcely remain <br /> above-5 ppb'(the comaxndy accepted odor thmhohl for drml4 water) and thus violate <br /> the Basin Place's=ra*m odor objective in a vr*ty localixcd, sz:M vohrttee of atrrouu ft <br /> grauszdw <br /> for anywhem from decades to bundnds of years. . <br /> 1 l_ The deten inatioa as to what constitutes a reasonable period to certain water <br /> gLmhty objectives must be based an evaluation of all relevant faezors, including but not <br /> limited to the extent and gaviry of any three:w public health and the env'irona mt during <br /> the period rcquixed to meet Basin Plan objecfives. Although the time required to attain <br /> objeativcs in thins cast is l+cmphy, it is,a reawrw4le period considering the facts of dis <br /> particular case, including that them are no known drinking water wells within 800 feet of <br /> the site and that affected water is of inferior quality and will likely be e=luded from'any <br /> I3 <br />