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10/22/2003 14: 24 209-579-� ^5 MODESTO ATC PAGE 01 <br /> 1117 Lone Palm Avenue, S <br /> T <br /> � Modesto, 95353 511 <br /> "VV kwww.atc-enviro.com <br /> 209.5.5 79.2221 <br /> Fax 209.579.2225 <br /> • t t 0 0 1 • t a It I M 0 <br /> October 16, 2002 _54.62574.0002 9NM1 <br /> a e I �� mss°' 18ran C-o-w1v—^�Nho. I9 Rssohone wMr. Jeff Wong ax e <br /> San Joaquin County <br /> Environmental Health Department <br /> 304 E. Weber Avenue, 3rd Floor <br /> Stockton, CA 95202 <br /> Subject: Site Status Report, Second and Third Quarters 2003, Smiths Canal Fump Plant, <br /> 2144 Fontana Street, Stockton, California, Site Code 1102 <br /> Mr. Wong: <br /> This letter report summarizes groundwater monitoring activities at the above referenced site <br /> (Figure 1) during the second and third quarters of 2003. These activities included monitoring <br /> fluid levels in all site wells and collecting groundwater samples from wells MW1, MW2, MW3, <br /> 1%4W4, MW5, MW6, and MW7 for laboratory analysis. The work was performed at the request <br /> of Mr. Jeff Wong of San Joaquin County Environmental Health Department (EHD). <br /> The purpose of the field activities was to monitor the effects of a construction dewatering project <br /> conducted by the City of Stockton Municipal Utilities Department (MUD) on the parcel adjacent <br /> to and north of the site. It is ATC's understanding that four extraction wells were installed on the <br /> parcel and that groundwater was extracted at a rate of 25 to 50 gallons per minute per well from <br /> April 2003 to August 2003. <br /> BACKGROUND <br /> An estimated 1,100 gallons of diesel fuel was reportedly leaked fl om a 5,000-gallon fiberglass tank as a <br /> result of an inadvertent puncture. The tank was repaired and returned to active service. <br /> In May 1988, Ensco Environmental performed a limited investigation, advancing a single soil boring <br /> (B-1) beneath the northern (fill) side of the tank to a maximum depth of approximately 17 feet below <br /> grade. A soil sample collected from this boring at 17-17.5 fleet bgs recorded 130 parts per million <br /> (ppm)total petroleum hydrocarbons as diesel (TPHd). Results of soil sample analysis are summarized <br /> in Table 1. As a result of this investigation, PHS/EHU required further assessment of the extent of <br /> contamination at the subject site. <br /> w:%2374.021q=i*y 3gmr2002.dw 1 <br /> ENVIRONMENTAL, GEOTECHNICAL ANO MATERIALS PROFESSIONALS <br />