ARCHIVED REPORTS_XR0009650 - Laserfiche WebLink

Home Browse Search

i Canepa s Car Wash I 248 E Park Street, Stockton, California aka: 642 N. Hunter Street Groundwater Sa lin Report Quarterly mP g eP I August 1995 Narrative On August 10, 1995, WI-IF Environmental Consultants, Inc , in conjunction with HKM Groundwater Monitoring, conducted field measurements, well pumping and groundwater sampling on seven (7) groundwater monitoring wells located at this site (Figure 2) Groundwater elevations were taken from seven (7) wells prior to pumping (Table 1 & Appendix B) Monitoring wells MW-1 through MW-7 were evacuated by means of a steam-cleaned, stainless steel bladder type pump During the three (3) volume pump I down of each well, samples were collected to measure field pH, electrical conductiv t , and temperature (Table 3 & Appendix B) Once stability was achieved, a minimum of three (3) well volumes were removed and samples were collected with a steam-cleaned disposable bailer The samples were then labeled and placed in an ice chest cooled with Blue IceID The samples, bailer blanks and trip blank were then logged on a Chain of Custody (Appendix A) and transported to the State-certified laboratory California Laboratory Services, in Rancho Cordova, California The analysis requested for the water samples I was EPA method 602 for BTX&E and EPA method GCFID (5030/8015) for gasoline The analytes and concentrations detected are listed in Table 2 of this report Groundwater Gradient The water level measurements from the monitoring wells were used to construct a groundwater gradient map and to calculate the gradient (Figure 3) The gradient has not ' changed significantly since last quarter, 5/4/95, and is variable from 0 0075 to 0 0428 ft/ft with a predominant trend of N40'E to N761E The water table has risen an average of 127 feet since 5/4/94 Ifistoncal gradient maps are included as Appendix C I I