SITE INFORMATION AND CORRESPONDENCE

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fai Ret-ion +l Recommendation • P02 15 M -_t I Appench.\ A ;tole. cost-ef'fec'tive technolo?� has been A NI AR letter indicates that the rlischa112er is 110 implemented and chemical concenUations lonver required to conduct active +eniecflation. Ill groundwater are projected to meet water nlorlitor+n`2. or reporting work at the site unless quality objectives through natural processes new information indicates the presence of within a reasonable period of time. i.e.. previously unkno\\n water qualit\ Impacts or prior to anv potential future beneficial use threats to health: ,afety or Seilsilive eco102ica1 of.,roundx\.a1ei.' Patterns of existing and receptors of that prior site characterization is projected future demands for usable water shown io'have been misrepresented. resources in the area must be considered in cleternlino.rl - The folloNvine, recommendations in sections 6. Regional Board staff recognize that the.total 6.4 and 6.5 below apple only to sites cleanup ot'a site although possible. is not alp+ays contaminated with petroleum hydrocarbon fuels. technically.or economically feasible. "l herefore a (i.e.. gasoline; diesel, kerosene. stoddard solvent. NF'AR designation fora UST site may be mineral spirits. fuel oil. aviation fuel niimures :ind considered If-the source has been removed and their additives). and should not be used for release analysis offife -oundwarer concentration trends cases involving chlorinated solvents.-metals or indicates the chernical:plurr e is reducing in size. oilier types of contaminants. such tii,lt'compliance \ iih water quality Each site is evaluated on a case-h_y-case hasis to . objectives will be achieved within a reasonable determine if it is a -'low risk-" .site (A site ma\ be period. considered a low risk site by definition. or achieve a low risk status by site remediation.) For each 6.1 NFAR Piocess site, complete characterization is required to determine file lateral and vesical extent of When Regional.Board.or LIA staff concur that file contamination. the risk to human health and safer petroleum source is rernovedor remediated. risks and the environment (including the Unna united to public health and safety and ecological zone. groundwater. and surface water), and the receptors are reduced t-o InsiLinificam levels. and impacts on or threats to existing and potential ground,Amer has been-cleaned up to levels 'frnure beneficial uses of'water resources. The profeclike ofexistin-, and future beneficial uses. discharger must demonstrate that the selected no tiirfher action is appropriate for a site. remedial rneasure(s) are effective. rind site monitoring must sho\+ that the remedial measures) At this point. the discharger will be requested to applied by the discharger has a high probability-to submit a closure report to the lead agency and.the reduce or remove the petroleum hydrocarbons to Resional Board with a formal request for no acceptable levels within a reasonable period. farther action at the.subject site. ."F lie discharger must also certifv in writing a complete list of all record fee title owners to the Regional or LIA. Once the lead a encs has reviewed iheclosure report and the NEAR request, and determines that - the N17AIZ report substantiates the request for closure. Regional Board or.LIA staff will notify all curtest record owners of fee title to the site of the determination that no further corrective action is regt,jred. The lead agency will request monitoring wells and rerhed-Jal systems are property desi o\ed. transferred or maintained under Cit\7Coum\ approved permit. A NFAR letter will be issued once verification of proper well destruction equipment removal is received.