Laserfiche WebLink
FILE COPT <br /> ENT <br /> HEALTH DEPARTM <br /> ESVIRONMENTAL <br /> SAN JpAQUIN CONY Bo S"�'�°rs <br /> ��,R.E.H.S. <br /> Car S•,R.D.I. <br /> venue, d Floo ins, <br /> ' 1'111I r Mike Hugg R.E.H. <br /> o►. co Wilson,R•E•H.S. <br /> 304 East Weir A las W• <br /> �' yy Donna IC.Heran,RE.H.S• California 95202-2708 Mgt I agorio,R.E.H.S. <br /> ' < Director Stockton, 468-3420 <br /> AI Olsen,RE.H.S. <br /> • Telephone: (209) Robert McClellon,R.E.H. <br /> •'• am Manager 464-013$ Mark Barcellos,R.E.H.S. <br /> Program R.E.Hs. Fax. (209) <br /> Laurie A.CotuIla, <br /> Program Manager <br /> MG 0 6 2002 <br /> JoHN DAVIS <br /> MCDOWELL & DAVIS TONING <br /> 1360 ESCALON AVE <br /> ESCALON CA 95320 <br /> RE: McDowell <br /> C6 oEscalonDavis Ave. owing <br /> SITE CODE: 1486 <br /> 1 <br /> Escalon CA 95320 <br /> has reviewed the <br /> San Joaquin County Environmental Health Department(SJGE2002 that was submitted on <br /> Conceptual Site Model" datedndahas the following comments. <br /> "Risk Assessment and <br /> your behalf by M.J. Kloberdanz&Associates (MJK) tion of the contaminant <br /> rt resents the results of a well receptor survey, a calcula <br /> The repo p application of the ASTM risk based <br /> mass remaining in the soil at this site and the app MJK from the results of the RBCA <br /> corrective action (RSCA) model. Conclusions drawn by <br /> to <br /> stion at <br /> model <br /> are that groundwater impacts at the site do not ponder air exposure ofemu multiple <br /> the <br /> closest production well, but that the cumulative <br /> effect�,�r and toxicant risk. MJK <br /> contaminants does pose a greater than acceptable <br /> he <br /> recommends that the interior of the McDowell &Davis Towing <br /> owin offisoil ce be surveyred for <br /> t of <br /> possible migrationo'obCO�ndulnant vapors, and cted to confirm he model. <br /> onsite exposed s <br /> issues concerning the report that need to be addressed. The results of <br /> There are several usti site closure ithe Central Valley <br /> n <br /> RBCA modeling are not sufficient to directly j fY <br /> but will be considered along with the site characterization dattual model should <br /> and site <br /> Region, potential contaminant <br /> conceptual model for closure consider masses released�(f poss b e), p <br /> discuss he contaminant source(s), acted media, and he <br /> and residual contaminant mass left in place. <br /> m• The data and method use <br /> Migration routes, a concentrations p <br /> for calculating the volumes an went d. In addition,the sources and ranges of all default <br /> resultant masses, should be p provided. <br /> values utilized in the RSCA model should be p conduct a passive soil vapor survey, but <br /> SJC/EHD will approve the recommendation to tany contaminants underlie the building in <br /> notes that here has been no demonstration that any -cher s that current site usage <br /> erha s it would be worthwhile for MJK to hoe�b�-check the validity of the <br /> question. P p the RBCA model. SJC/EHD further rove <br /> results presented by of the interior of the building and would not app <br /> would bias the results of air sampling <br /> such a proposal. <br />