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Plan <br /> Brookside <br /> Investigation Work Pl <br /> Brookside Estates,Stockton,California 1/9/07 Sert Consulting,Inc. <br /> 1.0 INTRODUCTION <br /> ' This site specific Field Investigation Work Plan has been prepared by Sert Consulting Inc. (SERT)for <br /> Caufteld, Davies, Donahue, LLP to describe the field investigation and data collection methods for the <br /> retrieval of soil and groundwater samples beneath the roadways within the Brookside Estates subdivisions <br /> i in Stockton, California(Figure 1). The owners within this complex consist of the Brookside Master <br /> Association,Brookside Lake Community Association,and Brookside Golf Community Association. The <br /> work is being performed to obtain soil and groundwater samples for laboratory testing related to the <br /> geotechnical conditions at these sites. <br /> 1.1 Background <br /> ' The Brookside Estates subdivisions were constructed over the period of 1990-2003. Significant <br /> pavement heave has been observed beneath many of the roadways within this complex. The cause of this <br /> 1 heaved condition is undetermined. The intent of this investigation is to retrieve soil samples from both <br /> disturbed and undisturbed soils beneath the roadways and sample the groundwater for natural chemical <br /> content. These samples will be tested offsite by a contracted testing laboratory. <br /> ' 1.2 Description of Site Conditions and Locations <br /> The Brookside Estates complex appears to be a normal residential site development. Individual <br /> ' subdivisions have been constructed as development progresses,and each subdivision consists primarily of <br /> one or two gated entrances into a series of houses constructed along an interior loop roadway,with <br /> appurtenant courts and cul-de-sacs as infill construction. The roadway pavement appears to be riddled <br /> with cracks and uplifted pavement which generally appear to coincide with the location of buried utility <br /> corridors. Subsurface utilities include buried electric supply lines,natural gas pipelines, both sanitary <br /> storm sewer pipelines,and communications conduits. Locally,the pavement appears to have experienced <br /> both uplift and subsidence resulting in differential settlement. <br /> We understand that the constructed conditions within the roadways is as follows: <br /> • The site was rough graded with naturally occurring soils in the area <br /> • The subsurface utilities were installed before lime treatment <br /> • The road alignments were treated with lime for stabilization to a depth of approximately 18 <br /> ' inches prior to paving <br /> • The pavement was applied directly over these treated soils to a thickness of approximately 4 <br /> inches. Aggregate base was not used in addition to soil treatment. <br /> The street address adjacent to the roadway for each drilling location is: <br /> Address Location # <br /> Brook Hollow Subdivision <br /> 6319 Brook Hollow Circle,Lot 1858 1 <br /> 6331/6337 Brook Hollow Circle, Lot 1856/55 2 <br /> Nostalgia Subdivision <br /> 1 5513 Vintage Circle, Lot 2210 1 <br /> 5514 Vintage Circle,Lot 2230 <br /> 5546 Vintage Circle, Lot 2267 3 <br /> ' Poppy Hills Subdivision <br /> 5174 Poppy Hills Circle,Lot 3859 1 <br /> 5237 Poppy Hills Circle, Lot 3848 2 <br /> 1 <br />