ARCHIVED REPORTS_XR0008410 - Laserfiche WebLink

Home Browse Search

Quarterly Report - September 1997 MARLOWE PROPERTY ' 4648 East Waterloo Road, Stockton, California 1.0. INTRODUCTION AND SCOPE OF WORK In accordance with a request from Ms Jonathan Marlowe of Marlowe Properties, Advanced GeoEnvironmental, Inc (AGE) has prepared this Quarterly Report for 4648 East Waterloo Road, Stockton, California The location of the site and its surroundings are illustrated in Figure 1 - Location Map Structures and monitoring wells on the site are illustrated in Figure 2 - Site Plan The scope of work was to monitor dissolved petroleum hydrocarbon concentrations in ground water and to characterize ground water flow direction and gradient on the site This report is prepared in accordance with guidelines established by the San Joaquin County Public Health Services - Environrnental Health Division (PHS-EHD) and the Central Valley Regional Water Quality Control Board (CVRWQCB) for investigation of underground storage tank (UST) sites Background information and a description of prior investigations at the site has been included in the Quarterly Report -April 1996, dated 12 June 1996, prepared by AGE Up-to-date ground water monitoring results are included in this report 20 PROCEDURES 2 1 MONITORING WELL PURGE PROCEDURES I On 26 September 1997, the depth to ground water In monitoring wells MW-1 through MW-6 and VW-1 were measured to the nearest 0 01 foot utilizing a Solinst water Ievel meter Relative ground water elevations were calculated for each well by subtracting the depth to ground water from the ' relative casing elevation of each well, surveyed from a temporary benchmark assigned an arbitrary elevation (Table 1- Relative Ground Water Elevations) Relative ground water elevations were plotted and contoured on a scaled site map (Figure 3-Relative G ound Water Elevation Map) ' After water levels were measured, Ms Mary Meays of the PHS-EHD reviewed the ground water monitoring data and recommended that only wells MW-1, MW-5, MW-6 and VW-1 be sampled ' during this monitoring event Subsequently, a minimum of three well volumes (approximately 8 to 12 gallons) of ground water was purged from monitoring wells MWA, MW-5, MW-6 and VW-I using a disposable bailer and new nylon rope ' Temperature, pH and conductivity were measured at regular intervals from each well using an ICM Model 52200 water analyzer Stabilization data and field logs are contained in Appendix A Purged ' ground water was stored in labeled, 55-gallon drums on-site in an area lacking public access • ' Adi anted GeoEmlronmental,Inc