ARCHIVED REPORTS_XR0010745 - Laserfiche WebLink

Home Browse Search

FLUOR DANIEL GTI May 21, 1996 Mr Bob DeNmno The Southland Corporation 19033 West Valley Hwy, D-104 Kent,WA 98032 Subject First Quarter 1996 Monitoring and Sampling Report Southland Sebe No 20680 9110 Thornton Road Stockton,California Project 02070 0230 Dear Mr DeNinno This letter describes the methods and results of monitoring and sampling activities performed by Fluor Daniel GTI, Inc (Fluor Daniel GTI) during the first quarter of 1996 at The Southland Corporation (Southland) Site No 20680 located at 9110 Thornton Road in Stockton,California (Figures 1 and 2, Attachment 1) A summary of activities conducted during this reporting period is provided below s Depth to water(DTW)was gauged in 5 groundwater monitoring wells (MW-1, MW-2, MW-4, MW-10 and MW-14) MW-12 was not accessible for monitoring or sampling ■ Groundwater samples were collected from the 5 groundwater monitoring wells The samples were submitted and analyzed for benzene.toluene, ethylbenzene and xylenes (BTEX), methyl tert butyl-ether(MTBE),and total petroleum hydrocarbons-as-gasoline (TPH-G) Groundwater Monitoring Data Groundwater monitoring was conducted on March 19, 1996 The wells were gauged to de.ermine DTW and to check for the presence of separate-phase hydrocarbons(SP) The wells were mondoree using an INTERFACE PROBE""Well Monitoring System,which uses a dual optical sensor/conducMy probe to distinguish between water and petroleum products A potentiometnc surface map was generated using top-of-casing elevations and DTW measurements(Figure 2) Based on monitoring data collected from the sate-related wells on March 19, 1996,groundwater flow was toward the southeast under a gradient of 01 to 002 ftfft. No SP was found in any of the monitoring wells Historical and recent groundwater monitoring data are summarized in Table 1 (Attachment 2) CZMg195q*Sth481j 1401 Halyard Drive, Suite 140 /West Sacramento, CA 95691 USA (916) 372-4700 FAX (916) 372-8781