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At <br /> Peterson Technical Services <br /> RI <br /> - . - <br /> RECEIVED <br /> December 1 , 1988 Q Q 19 $ 8 <br /> IC <br /> AAQUIN COUNTY <br /> Mr . Chet Davisson , Director Li ` ,� 1 ' 198uPLANNING DIVISION <br /> San Joaquin County <br /> Department of Planning and Building Ingp ,grdi� �1vICES <br /> 1810 E . Hazelton Avenue <br /> tockton , California 0. 5 .105 <br /> Dear Mr . Davisson : <br /> I am sending you this letter , at the request of Dr . Helmuth <br /> Hoff , in order to outline - for you the current plan for sampling <br /> the soil and groundwater on the Woodson Estates property , for the <br /> purpose of characterizing the potential risk which may exist as <br /> a result of the presence , if any , of chemicals identified by the <br /> California Department of Health Services ( CDHS ) during their site <br /> evaluation of Lodi Airport . The Lodi Airport has been scheduled <br /> by CDHS for clean - up as a hazardous waste site under the <br /> Hazardous ,. Substance Clean - up Bond . Act of 1984 as a result of the <br /> presence of identified hazardous chemicals on airport grounds . <br /> The potential risk to humans from any identified chemicals <br /> will be calculated as a function of toxicity of the specific <br /> chemical substance , coupled with the level and duration of <br /> exposure . The exposure pathways to be considered are inhalation <br /> ( fugitive dust ) , direct contact ( dermal exposure ) , and ingestion <br /> ( drinking water ) . <br /> Development of sampling protocol will be coordinated with <br /> scientists within the . Toxic Substances Control Division of the <br /> California Department of Health Services . Risk assessments will <br /> be conducted by following the guidelines within the California <br /> Department of Health Services , " Decision Tree Manual " . <br /> Sampling Program : <br /> 1 . Soil <br /> In order to evaluate a worst case exposure situation soil <br /> samples will be taken from Woodson E s t a t e p r o p e r t y a t <br /> locations immediately opposite the aircraft wash down area <br /> ( south side of Jahant Road at Frontage Road " T " <br /> intersection ) , and immediately opposite the hazardous waste <br /> spillage / disposal site ( West end of Runway 8 / 26 ) . A third <br /> sample site will be located immediately opposite the airport <br /> and between the two locations described above . <br /> 9517 Durango Way Elk Grove , CA 95624 ( 916 ) 685 - 5010 <br />