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Draft Limited Phase II Site Investigation <br /> Austin Road-SR 99 Van Till Property Acquisition BCI File No. 2643.x <br /> Manteca California October 23, 2013 <br /> bgs. Potential sources of TPH are unknown but could include heating oil/underground storage <br /> tanks which may have been located at the dairy site. Caltrans requested a sample (either <br /> groundwater or soil depending on subsurface conditions)to be collected at 25-feet bgs. <br /> SCOPE <br /> BCI completed the following tasks to prepare this report: <br /> • Prepared and obtained Caltrans approval of our sampling Workplan <br /> • Prepared a site specific Health and Safety Plan for sample collection <br /> • Coordinated with Underground Service Alert to locate underground utilities <br /> • Obtained a San Joaquin County boring permit <br /> • Collected ten(10) soil samples from five (5)boring locations within the project limits <br /> • Obtained a soil sample from 25-feet bgs using direct push drilling methods <br /> • Submitted the soil samples to SunStar Laboratories, a California-certified analytical <br /> laboratory,to perform analytical testing <br /> • Reviewed analytical results and prepared this report <br /> SAMPLING SUMMARY <br /> Sample Collection <br /> • Pesticide/heavy metal and ADL samples were obtained from five (5)boring locations <br /> spaced approximately 200-feet apart along the proposed acquisition parcel. Two discrete <br /> samples(A6, 0 to 6"bgs) and(A24,24 to 30"bgs)were collected from each boring <br /> utilizing hand auger sampling equipment and transferred into glass jars. Sampling <br /> equipment was cleaned between each boring location by washing with an Alconox <br /> solution followed by rinsing with potable water and a second rinse using deionized water. <br /> • TPH sampling was performed at one location using direct push drilling/sampling <br /> techniques. A soil sample was obtained from a depth of 25-feet bgs utilizing a BioLiner <br /> disposable plastic tube. The tube was then cut to collect appropriate sample segments. <br /> The boring was backfilled with grout. Cuttings were drummed pending analysis results. <br /> • Soil samples were labeled,placed in a cooled ice chest, and delivered to a California- <br /> certified analytical laboratory under continuous chain-of-custody documentation. <br /> Sample and Boring locations are shown on Figure 2. <br /> Soil Description <br /> The soil profile consisted primarily of loose to medium dense, sandy fill in the upper two feet. <br /> At twenty-five (25)feet bgs soils consisted primarily of dense silty clay. <br /> 2 <br />