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MacCnnon Environmer,,,1 Consulting <br /> Specia1r7ijtg in Ground W4irer and Soil Contamination 2834 San Amonio Drive <br /> 'Xalnui Creek, California 94598 <br /> May 1 , 1990 (415)930-9272 <br /> Mr . Manuel Vierra & E%EIV , <br /> MSV Construction Co. MAY <br /> 1009 Villa Maria Court <br /> San Jose, CA 95125 ENVIRONMENTAL HEALTH <br /> Dear Mr . Vierra : <br /> PERMIT/SERVICES <br /> The soil samples collected at the property on E. Harding Street in Stockton <br /> show no evidence of contamination. Our report follows . <br /> SUBJECT: REPORT ON DRILLING AND ANALYSES OF 8-9 SOIL SAMPLES <br /> This report describes the work performed by MacKinnon Environmental <br /> Consulting (MEC) for MSV Construction at Harding and Waterloo Streets in <br /> Stockton, California. The main purpose of the work was to investigate the <br /> shallow soil for evidence of petroleum hydrocarbon contamination. This <br /> report includes a description of the work performed , field observations and <br /> results of analyses . <br /> BACKGROUND <br /> The site is located at the intersection of E. Harding and Waterloo Streets <br /> in Stockton, California. It was reported that at one time two underground, <br /> diesel storage tanks were located west of the entrance gate on the south- <br /> west side of the site. No records were available as to the removal of <br /> these tanks or whether soil samples had been collected. <br /> MSV requested that MEC collect soil samples in the area of the diesel tank <br /> pits to see if the soil may have been contaminated by fuel leakage or <br /> spillage from the tank . They also requested soil samples be taken at other <br /> locations on the site . <br /> SCOPE OF WORK <br /> A permit was obtained from San Joaquin County Environmental Health Division <br /> to carry out the work and our proposal (No . 490STK ) was submitted as a <br /> workplan. The limited subsurface investigation conducted by MEC on April <br /> 20 , 1990 , consisted of collecting soil samples , at locations suggested by <br /> the client. An MSV agent approved boring locations in the field at that <br /> time. The site plan (Figure 1) shows the location of the samples in <br /> relation to the site. Nine shallow soil borings were drilled and the soils <br /> logged by a registered geologist; a soil sample was collected from each <br /> boring. Soil samples were sent to a state certified laboratory for <br /> analyses of gasoline, diesel and benzene , toluene, ethylbenzene and xylene <br /> (BTEX) . <br /> FIELD METHODS <br /> The borings, labeled B1-B9, were drilled with hollow stem augers , logged <br /> and sampled. Five borings were drilled in the areas identified by the MSV <br /> agent as the former location of the underground tanks . Four additional <br />