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E P PUBLIC HtALTH SERVICES FILY SAN JOAQUIN COUNTY 2: ENVIRONMENTAL HEALTH DIVISIONfig Karen Furst, M.D., M.P.H., Health Officer c. P 304 East Weber Avenue, Third Floor • Stockton, CA 95202 209/468-3420 CSK AUTO MAR 0 7 2001 645 E MISSOURI AVE STE 400 PHOENIX AZ 85012 RE: Grand Auto#4025 Site Cbde#:0515694 1210 TracyBlvd. RO#:0000825 Tracy,CA.,95376 San Joaquin County Public Health Services,Environmental Health Division(PI]S-EHD)has reviewed the GeoTek Inc"Phase I Environmental Assessmerd'dated March 2,2000 and GeoTek Inc"Phase H Environmental Assessment"dated March 7,2000 as submitted by Kennedy/Jenks on February 15,2001 and has the following comments. Sort samples were collected from three(3)shallow soil borings("4025/SB-1,2,&3")on February 17,2000. The chain of custodyinckded in the Phase H report indicated onlysoil samples were analyzed and onlyEPA Method 8015B (Total Petroleum Hydrocarbons as Diesel,"TPHd")was requested. Based on the Phase I findings,other corstituaents of concern were identified and so were other areas of concern. The soil sampling did not include the noted consmients of concern and the Phase H did not investigate other areas where spillage was noted. Kennedy/Jenks requested a No Further Action letter. Since the investigation did not include laboratoryanalyses for all constituents noted to be present at this site,in all areas where theywere located,nor was a groundwater investigation inchded,PHS-EHD concluded that the Phase II Report was inconclusive and a No Further Action letter could not be issued. PF&EHD has now been requested to recomrnend procedures and inclusions that would eventuallyallow an evaluation for closure("no further action/investigation required"). PHS-EHD is authorized to evaluate,comrrrrrt,and issue"No Further Action'letters for approved underground storage tank(LbT)sites under a contract with the State Water Resources Control Board(SWRCB). This site is not a registered LET site and as such,PHS-EHD has no authornyto direct investigative or remedial actions. hider certain vokmtarycon ditions PHS-EHD will assist non-LET site responsible parties in their subsurface motion. PHS-EHD w111 review and comment on proposals submitted and will issue well pem=with the understanding that the responsible partyfollow the recommendations offered Since PHS-EHD has no authontyto direct the investigation on non-USTsites,it is to be understood that this service is provided to the partywgxs*the oversight as a courtesyso that a properlyauthorized regulatoryagency maybave all the infomnawn needed to make a thorough evaluation of the site's subsurface conditions. PHS-EHD will recommend actions that will attempt to delineate the lateral and vertical events of the soil and groundwater contarrnnation Based on the above ground usage and historyof the site,PHS-EHD will recommend laboratoryanalyses that are gable of detecting the formedyidenvfied constituents. EPAMethods and detection limits wr71 be recomnv decd and areas and depths of the subsurface investigation will be inchded in the recommendations. A Division of San Joaquin County Health Care Services