Laserfiche WebLink
' Bank of Stockton- Cutter Lumber Site Page 4 <br /> Quarterly Groundwater Monitoring Report <br /> Project No 102 2 <br /> May 23,2000 <br />' Extreme care was exercised while collecting samples to prevent agitation of the <br /> water contained in the bailer Water samples were transferred from the bailer <br /> into 40 ml VOA vials preserved with hydrochloric (provided by the analytical <br /> rlaboratory) All samples were checked for head space bubbles, labeled, inserted <br /> into foam holders and placed in an ice chest cooled to 4°C for transport to the <br />' laboratory <br /> Gasoline contaminated purge & rinseate water generated during the activities <br />' described above was stored on poly drums located on the site American Valley <br /> Environmental will remove this material prior to the next scheduled depth to <br /> water measuring event Documentation of the disposal of purge water from the <br /> last monitoring event is herein attached as Appendix C <br /> 2.2 Groundwater Sample Analyses <br /> Groundwater samples were analyzed as follows <br /> • Total Petroleum Hydrocarbons as Gasoline (TPH-G) by EPA method <br />' 5030/8015(m) <br /> • Benzene Toluene, Ethelbenzene and total Xylene (BTEX) by EPA method 602 <br /> The detection limits are included in the summary analytical data table (Table 2) <br /> Detectable levels of gasoline range petroleum hydrocarbons and/or BTEX <br />' compounds were found in water samples from all but two of the wells which <br /> were sampled <br />' 2.3 Field Data <br /> The field data for this groundwater monitoring event are summarized in <br />' Appendix B and Table 1 The level of groundwater has risen approximately one <br /> foot since the groundwater monitoring event completed in October of last year <br /> The bearing of the groundwater flow has remained generally consistent however <br />' Groundwater gradient calculations for MW-6, 10 & 11 yield the following <br /> gradients and directions <br />' Table: Groundwater Gradient, 1999 <br /> Date Gradient, Direction/Slope <br /> January 19, 1999 N430E, 0 0024 ft/ft <br /> March 2, 1999 N540E, 0 0017 ft/ft <br /> March 24, 1999 N450E, 0 0023 ft/ft <br /> July 7, 1999 N400E, 0 0038 ft/ft <br /> October 10, 1999 N480E, 0 0046 ft/ft <br /> January 20, 2000 N40-E, 0 0021 ft/ft <br /> April 25, 2000 N53-E, 0 0018 ft/ft <br /> 2937 Veneman Ave,#13240 Geo-Phase Environmental Inc Phone (209) 569-0293 <br /> Modesto, CA 95356 Fax(209) 569-0293 <br />