ARCHIVED REPORTS XR0003389 - Laserfiche WebLink

Home Browse Search

' IT Corporation 100 5 fort Chu,ir-, I l f�l i 11 n Concord CA 94_)20 1120 Tc1 925 188 0808 Rn 915 188 0883 he(r, a 1/t 777I/e f of TIn II ( rn77p 9roup ' August 7, 2000 ' Mr Bob DeNlnno 7-Eleven, Inc 10220 SW Greenburg Road, Suite 470 Portland, Oregon 97223 ' Subject Third Quarter 2000 Monitoring and Sampling Report 7-Eleven Store No 14117 2725 Country Club Boulevard Stockton, California IT Project No 779966 ' Dear Mr DeNinno This Third Quarter 2000 Monitoring and Sampling Report presents the results of activities performed by ' the IT Corporation at the subject site (Figure 1, Attachment 1) on August 8, 2000 A summary of activities conducted during this reporting period is provided below Depth to water (DTW)was gauged in four site-related groundwater monitoring wells (MW-1 through MW-4) Groundwater samples were collected from the groundwater monitoring wells and submitted ' to a California-certified laboratory for analysis for benzene, toluene, ethylbenzene and xylenes (BTEX), total petroleum hydrocarbons-as-gasoline (TPH-G), and the oxygenates, methyl-tert-butyl-ether(MTBE), tert-butanol (TBA), diisopropyl ether (DIPS), ethyl-tert-butyl ' ether (ETRE), and tert-amylmethyl ether (TAME) Groundwater Monitoring Data Groundwater monitoring was performed on August 8, 2000 Before monitoring, the well caps were opened to allow the water in each well to stabilize to atmospheric pressure The DTW was measured to ' the nearest 0 01 foot from the top of the well casing using an interface probe Monitoring results from the May 16, 2000 monitoring and sampling event and historical data are presented to Table 1 A potentiometnc surface map was generated using top of casing elevations and DTW data (Figure 2) Based on the monitoring data, the estimated groundwater flow is generally radial from the tank pit at a gradient 0 001 foot per foot Field data sheets are included in Attachment 3 14117030 RPT