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L - Quarterly Report - First Quarter 2001 MOORE TRUCK LINES 3400 Newton Road Stockton, California 1.0. INTRODUCTION ' At the request of Mr Weilburg of Moore Truck Lines,Advanced GeoEnvironmental,Inc (AGE)has prepared this quarterly report for the site at 3400 Newton Road, Stockton, California The scope of ' work included monitoring and sampling one ground water monitoring well (MW-1) and sampling one domestic well (DW-1) to assess for petroleum hydrocarbons and fuel oxygenates Monitoring well MW-I was utilized for monitoring dissolved petroleum hydrocarbon and MTBE in ground ' water in the vicinity of an unauthorized release of petroleum hydrocarbons from USTs formerly located near the truck maintenance and repair shop building Domestic well DW-I is utilized for on- site water and is the closest potential sensitive receptor, located approximately 145 feet away from ' the former under ground storage tank (LIST) area DW-I has been in a down- to cross-gradient position relative to the former UST area during the last four monitoring events ' The preparation of this report was required by the San Joaquin County Public Health Services- Environmental Health Division (PHS-EHD) to docurnent and update site status The site setting is illustrated on Figure 1 Locations of structures, borings, domestic wells, and the monitoring well on the site are illustrated on Figure 2 Locations of structures and monitoring wells on adjacent sites are illustrated on Figure 3 ' Site history and findings from previous investigations at the site are detailed in the AGE-prepared Preliminary Investigation and Evaluation Report (PIER), dated 15 September 1999 I 2.0 PROCEDURES ' Quarterly ground water monitoring was performed on 28 March 2001 Field work,was performed in accordance with the Central Valley Regional Water Quality Control Board (CVRWQCB) and ' PHS-EHD guidelines for the investigation of underground storage tank (UST) sites,and sampling ground water monitoring wells ' 21 MONITORING WELL PURGE PROCEDURES ' On 28 March 2001, a 5olinst water level meter was used to measure the depth to ground water in monitoring well MW-1 relative to the top of the well casing (well head) After the ground water depth measurement was collected,monitoring well MW-1 was purged using a new disposable plastic ' bailer Approximately 5 gallons of water were evacuated from the monitoring well, equivalent to more than three casing-water volumes Advanced GeoLnvzronment4 Inc y