Laserfiche WebLink
Date November 2, 2001 <br /> ARCO QUARTERLY GROUNDWATER MONITORING REPORT <br /> Facility No 02186 Address 3212 North California Street, Stockton, California <br /> ARCO Environmental Engineer Paul Supple <br /> Consulting Co/Contact Person Delta Environmental Consultants, Inc /Jay R Johnson <br /> Consultant Project No D000-330-1 <br /> Primary AgencylRegulatory ID No Samuel Savig, San Joaquin County PHS/EHD <br /> WORK PERFORMED THIS QUARTER (Third 2001) <br /> 1 Delta collected monthly depth to water measurements in the monitoring wells and vapor extraction <br /> wells <br /> 2 Groundwater samples were collected from monitoring wells MW-1 through MW-7 and vapor <br /> extraction wells VW-1 B, VW-21B, and VW-36 on September 13, 2001 and submitted for laboratory <br /> analysis <br /> 3 Delta compiled and evaluated the groundwater monitoring data <br /> 4 Delta retained Woodward Drilling Company to drill and install 3 offsite monitoring wells on August <br /> 13 and 14, 2001 <br /> WORK PROPOSED FOR NEXT QUARTER (Fourth 2001) <br /> 1 Depth-to-water measurements will be collected from the monitoring and vapor extraction wells on <br /> a monthly basis <br /> 2 Delta will continue to perform quarterly groundwater monitoring The next sampling event is <br /> tentatively scheduled for December 2001 Groundwater samples from monitoring wells MW-1 <br /> through MW-7 and vapor extraction wells VW-1 B, VW-213 and VW-3B will be collected and <br /> analyzed for total petroleum hydrocarbons as gasoline (TPHG), benzene, toluene, ethylbenzene, <br /> and total xylenes (BTEX) using USEPA Method 8015/8020 DHS LOFT, and for tertiary butyl <br /> alcohol (TBA), methyl tertiary butyl ether, (MTBE), di-isopropyl ether (DIPE), ethyl tertiary butyl <br /> ether (ETBE), tertiary amyl methyl ether (TAME), and 1,2-dichloroethane (1,2-DCA) using USEPA <br /> Method 8260A <br /> 3 Delta will submit a well installation report documenting the findings of the August 13 and 14 <br /> subsurface assessment activities <br /> Current Phase of Project Monitoring_ <br /> Frequency of Groundwater Sampling MW-1 through MW-7 and shallow vapor wells VW-1 <br /> through VW-3= Quarterly <br /> Frequency of Groundwater Monitoring Monthly _ <br /> Sample Date September 13, 2001 <br /> Is Free Product(FP) Present on Site No <br /> FP Recovered this Quarter NA <br /> Cumulative FP Recovered to Date NA <br /> Approximate Depth to Groundwater 45 10 to 46 69 feet bgs (September 13, 200 1) <br /> P\A.RCO121 WQTRLY12001\Arco_2186}Q01 Report doc Delta <br />