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' 30 December 1998 <br /> AGE-NC Project No 95-0173 <br />' Page 4 of 12 <br />' Between August 1996 and October 1998, depth to ground water at the site generally decreased from <br /> 3 5 feet bsg to 25 feet bsg with a general ground water flow direction towards the no t Ground <br /> water elevation contour maps for the site were Included in previousQuarterlyReports p pared by <br />' AGE <br />' 3.0. SCOPE OF WORK <br /> Based upon the results in the Corrective Action Plan dated 05 May 1998 and Addendum to <br />' Corrective Action Plan dated 05 August 1998, the PHS-EHD is requiring gi ound water and soil <br /> remediation within the "core" petroleum hydrocarbon impacted area at the site <br />' Remediation within the "core" petroleum hydrocarbon impacted area at the site will consist of the <br /> following tasks <br /> a Permitting, planning and pre-field work activities, <br /> • Installation of remediation wells, <br />' • Installation of underground remediation piping system, <br /> • Soil vapor extraction system start-up period, <br /> • Monitoring and maintenance, <br /> • Progress/confirmation sampling <br /> Each of these tasks are discussed below in detail <br /> 1 <br />' 3 1 PERMITTING, PLANNING AND PRE-FIELD WORK ACTIVITIES <br /> Applicable permits will be obtained from the PHS-EHD, San Joaquin Valley Air Pollution Control <br /> District(SJVAPCD) and City of Stockton Building Department prior to initiation of the remediation <br /> ro eCt AS ie Uired b PHS-EHD enni`ltitl- a licalth fluid scifel plan will be prepared in accordance <br /> i; � � y P �� y � �-_p <br /> with Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities <br />' (National Institute for Occupational Safety and Health Administration, U S Coast Guard and U S <br /> Environmental Protection Agency, 1985) Prior to digging activities, each proposed digging location <br /> will be clearly marked and an utility clearance obtained through Underground Service Alert <br />' Advanced GeoEmironmcntaI,Inc <br /> 1 <br />