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F C) <br /> Subsurface Investigation, Well Installation, and Sample Analyses Results Page 16 <br /> Cintra Park Phase II Development, <br /> r� Tract 2705, Tracy, California <br /> July 23, 1998 CTE Job No. 20-0445B <br /> significant groundwater contamination present. Due to the small size of the site, and the close <br /> 1 . <br /> proximity of the wells to the excavation, if any significant contamination were present immediately <br /> downgradient of the excavation, this should have been drawn to one of the wells during purging, <br /> resulting in detectable TPH and/or BTEX concentrations in the May l 3th groundwater sampling <br /> event. Since no detectable TPH and/or BTEX concentrations were present in this event, and that <br /> associated soil sample analyses also show very low concentrations (toluene only) we strongly feel <br /> that this is enough evidence to warrant closure of this site. <br /> 8.0 LIMITATIONS OF INVESTIGATION <br /> r <br /> - The samples taken and used for testing and the observations made are believed to be representative. <br /> However, soil and geologic conditions and contamination can vary significantly between exposures. <br /> Threrefore,the findings of this report are valid as of the present date. Changes in the conditions of <br /> a property can occur with the passage of time,whether the are due to natural processes or the works <br /> p p�Y p g Y <br /> of man on this or adjacent properties. In addition, changes in applicable or appropriate standards <br /> may occur, whether they result from legislation or the broadening of knowledge. Accordingly, the <br /> findings of this report may be invalidated wholly or partially by changes outside our control. <br /> l { <br /> CATEEL FILES\CINTRA PARKICINTRA7-13.DOC <br /> i <br />