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- z ------ VIA CONCLUSIONS- OPINIONS.AND RECOMMENDATIONS F - - -*From visual-observations,'there is no surface_contamination from conspicuous hazardous _ = - - inkerials. Section (c) of SarOoYquih County-Development,Title 9 905.12 states "Corrective ;Action. If the report indicates there are-surf iee and subsurface contanrixnation, corrective action v shall be recommended in the report and concurred with by Environmental Health prior;to the - _ .. _..W _. - �� SE -,=issuance of the_building periit.' Smce no environmental concerns were found!aonV or near the _ - - - _ - _ &'subject rope this.report contains no recommendations for corrective or mitigative action p Potential environmental'impact frorh the USTs at the Trairta.home and the Tracy Rural Fire Departmentindicate that:there is.air extremely small likelihood of adverse impact to tlie"subject' ,properties. It would be impossible to investigate environmental-contaminatian�at the_Traina st: = - = -- - . iesidence=because the location of where the tank was buried is not_kinown = - gf ( ) g - -Y P =- gEbuildings is Asbestos containin materials- ACMs testin from°an onion of the existin outside the scope of this investigation =If the buildings are ever_demolished, it Mill be the - responsibility of the-demolition contractor or:his representative to test for ACNs at that time _ Individual horn' esites on the-subject property'were not investigated. Private hoffiesites may - - contain lead paint, asbestos or hazardous materials that may or, r may,not be typical. Typical - 4 household,"hazardous materials""...include-pesticide sprays, gasoline,paint thinners, used motor oil, antifreeze etc ..The ASTM E=1527 .00 Documentreferenced above refers to dei minimus - - - -- .- gY p environmental conditions. De minrrrzus conditions enerall do not resent a rnaterial risk to - - .public health onto the environment and,generally would not include an enforcement action if observed by the appropriate governmental agencies-.. Conditions determined to�be de minimus are not recognized environmental conditions: Household-ha—ardous-materials.ma be'considered de._: y ., g. Y� minamus concerns if there has been no spillage or dumping, wliicl�was not observed:�This�also - applies to the on-site se tic-.s sterns that serve the ex' isfing residential structures on the subject parcels:--It is common knowledkee thaat the subsoils have excellent percolation in the underlying- _ G- - 4 - gravel strata. The EHD no-longer allows the installation of sumps or'pits in this area due to'the _ .-nitrate problem in thegroundwater. _ _- ` 7. z. {' Incompliance with EHD requirements,.sampling and analysis for.DDT_and an"Exposure. Assessment were conducted for,-our 1999.SSCR The`EHD warited-to.assess and quantify.the -= :probability of adverse Human health effects from DDT,-DDE and DDD conceritration5 in the soils _ of the Castello Estates and.the current Linne Estates project: Frorri the attached historical aerial -.- photographs, it is documented that the entire-Linne Estates properties were under tree crop - _production in_1957, which is during a period of time that DDT was probably uged on these trees. _- i Therefore; the entire in-place-surface soils for. Linne Estates project may be theoretically estinlated'to contain similar-concentrations of DDT ,DDE and DDD that were found in Area"A" 1:.and.AreaM":for the 1999 SSCR' d. k�Chesney^Consulting §L w