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--"� <br /> .x <br /> ER <br /> f <br /> MONITORING WELL WATER ANALYSES <br /> HOLT BROTHERS TRACTOR COMPANY <br /> FOR <br /> 1.0 NT ODUCTIO OGE SCOP <br /> As per written authorization from Bio National Corporation on February 14, <br /> 1-990, Dames & Moore c-Illected water samples from six existing monitoring wells <br /> located at the Holt Brothers Tractor Company facility at 1521 West Charrar ;lay <br /> (Highway 4) in Stockton, California (Figure 1). Development and sampling of the <br /> wells occurred on February 21, 22 and 27, in 1990. In addition, water levels <br /> were measured in `each well prior to sampling on February' ry 2i and 27, 1990, <br /> (;'figures 2 and 3, respectivel-). <br /> �Wa <br /> _ :he purpose of the sampling and chemical analyses was to prcvide <br /> additional data on the t� <br /> ,Ipe and concentration of individual n 1 <br /> eum <br /> hydrocarbon i,ontaminants previously identified in two of the wells (KW-1`andMW- <br /> 2), to document changes in these contaminant levels since initial water samples <br /> were taken in December 1438, and to determine if the same constituents were <br /> � + present (or absent) in the remaining we1J_s. <br /> int g Fluid levels wets measured for the <br /> purpose of determining the groundwater gradient and direction, and for <br /> e identifying the down-gradient wells likely to be influenced by potcntially <br /> migrating contaminants, - <br /> 6 The scope of work fcr completing these objectives included; <br /> Measuring fluid levels it existing monitoring wells MW-1 through MW- <br /> 6 (six wells) before the collection, of water samples from each well; <br /> followed by measuring fluid levels in each well approximately one <br /> week after rite above sampling; <br /> Collecting water samples from each monitoring well for the analysis <br /> of total petroleum hydrocarbons (,asolina and diesel); benzene, <br /> to!uene, xylene(s), and ethylbenzene; selected eblorinatod volatile <br /> ' 4J <br /> BIONT'L.H2O l <br /> April, 1990 <br />