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. 11 July 2000 <br /> AGE-NC Project No 96-0232 <br /> Page 2 of 5 <br /> The scope of work will consist of the following tasks <br /> • Permitting, planning and pre-field work activities, <br /> • Drilling and observation well installation, <br /> • Aquifer pump test, <br /> • Report of findings <br /> 2 1 PERMITTING AND PRE-FIELD WORK ACTIVITIES <br /> Applicable site assessment permits will be submitted to the San Joaquin County Public Health <br /> Services - Environmental Health Division (PHS-EHD) As required by PHS-EHD permitting, a <br /> health and safety plan will be prepared in accordance with Occupational Safety and Health Guidance <br /> Manual for Hazardous Waste Site Activities (National Institute for Occupational Safety and Health <br /> Administration, U S Coast Guard and U S Environmental Protection Agency, 1985) Prior to <br /> . drilling activities, each proposed drilling location will be clearly marked and a utility clearance <br /> obtained through Underground Service Alert <br /> 22 GROUND WATER EXTRACTION WELL INSTALLATION <br /> AGE proposes to install one four-inch diameter ground water observation well screened 10 to 35 feet <br /> bsg (shallow) and one four-inch diameter ground water observation well screened 40 to 50 feet bsg <br /> (deep) to supplement an aquifer pump test at the site The proposed shallow well (10 to 35 feet bsg) <br /> will be screened through first encountered ground water, the proposed deep well (40 to 50 feet bsg) <br /> will be screened through a permeable sand layer and above a less permeable silty clay/clayey silt <br /> layer Cross sections A-A ' and B-B' depicting general lithology beneath the site are included with <br /> the Problem Assessment Repoi t, dated 19 June 2000(Figures 9 and 10) The proposed groundwater <br /> observation wells will be placed in areas of known ground water MTBE contamination at the site <br /> Based on the MTBE-impact encountered during the investigation, AGE proposes both observation <br /> wells to be located approximately 5 to 10 feet north-northeast of ground water monitoring well <br /> MW-1 (See Figure 2) <br /> Following each well installation, the observation wells will be developed to maximize water flow <br /> into the well and minimize the amount of fine-grained sediment drawn into the well during pumping <br /> or bailing Procedures for well installation and development are presented in Sections 3 2 and 3 3, <br /> respectively <br /> Advanced GcoEnwonmcnlal,Inc <br />