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MrS Santa Fe Pacific Pipeline Partners, L.P. J-6075.03 <br /> January 6, 1994 STOCKTON WORK PLAN Page 3 <br /> SCOPE OF WORK <br /> Hart Crowser will complete this work by performing the five tasks as <br /> described in the following sections. These five tasks are: <br /> Task 1. Augering and sampling three additional shallow soil borings; <br /> Task 2. Installation of an upgradient, B-zone groundwater monitoring well; <br /> Task 3. Preparation of an interim technical memorandum; <br /> Task 4. Conducting a field treatability test for soil remediation; and <br /> Task 5. Preparation of a RAP <br /> Task 1 - Hand Augered Soil Barings <br /> Under this task, this Work Plan will be submitted to the RWQCB and the <br /> San Joaquin County Health Department (SJCHD) for review. Following <br /> their review, the RWQCB and SJCHD comments will be incorporated and <br /> the Work Plan will be finalized prior to the initiation of field work. In <br /> addition, Hart Crowser will apply for the necessary soil boring and <br /> monitoring well installation permits as required by the SJCHD. This work <br /> will be completed using the Health and Safety Plan prepared by Hart <br /> Crowser for the previous investigation work at this site. The Health and <br /> Safety Plan is attached as Appendix A of this Work Plan. <br /> Total petroleum hydrocarbons (TPH) as diesel and gasoline were detected <br /> in the shallow soils between 0 and 10 feet below ground surface (BGS) in <br /> the area of the manifold/prover loop during the previous investigation. <br /> Hart Crowser will retain a licensed drilling company to hand auger two <br /> soil borings (EB-16 and EB-17) to further delimit the northern extent of the <br /> hydrocarbon impact in this area. One soil boring will be placed northwest <br /> of the manifold near the facility office and another will be placed <br /> approximately 100 feet north of the manifold. A third soil boring will be <br /> placed in the vicinity of monitoring wells M-4 and M-7 to delimit the <br /> northeast extent of the hydrocarbons detected in soil boring EB-15 during <br /> the previous investigation. The approximate locations of existing and <br /> proposed boring locations are shown on Figure 2. <br /> Each boring will be augered to a maximum depth of 10 feet or first <br /> encountered groundwater. According to previous groundwater data, <br /> groundwater levels vary seasonally at this site and were found to be <br /> approximately 10 feet BGS during the summer months. <br />