Laserfiche WebLink
1 <br /> Page 4 <br /> Bank of Stockton- Cutter Lumber Site <br /> Winter Quarter Groundwater Monitoring Report <br /> Project No. 102.2 <br /> L 20 April 1999 <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 l <br /> alytical <br /> into 40 ml VOA vials preserved with hydrochloric c(provided <br /> s,by the a <br /> iab led,nnsert d <br /> laboratory). All samples were checked for head spa <br /> into foam holders and placed in an ice chest cooled to 4°C for transport to the <br /> laboratory- <br /> LJI <br /> A total of 3 drums of gasoline contaminated purge & rinseate water were <br /> L <br /> generated during the activities described above. 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 /> i <br /> 2.2 Groundwater Sample Analyses <br /> Groundwater samples were analyzed as follows: <br /> • Total Petroleum Hydrocarbons as Gasoline (TPH-G) by EPA method 8015(m). <br /> • Total Petroleum Hydrocarbons as Diesel (TPH as Gasoline) by EPA method <br /> 303018015(m). <br /> The detection limits are included in the summary analytical data table(Table 2). <br /> LDetectable levels of gasoline range petroleum hydrocarbons and/or BTEX <br /> compounds were found in water samples from wells MW-1, 6, 7, 8A, 8B, 9, and <br /> 11. The samples from MW-4, and 10 did not contain detectable gasoline range <br /> total petroleum hydrocarbons (TPH-G) or BTEX compounds. <br /> I � <br /> (` 2.3 Field Data <br /> L� The field data for this groundwater monitoring event are summarized in <br /> { <br /> Appendix B and Table 1. The level of groundwater has risen approximately two <br /> feet since the groundwater monitoring event completed in December of 1998. <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 /> lam`' <br /> LG <br /> F <br /> 1 <br /> a <br /> III <br /> 1 <br /> I 2937 Veneman Ave.,#B240 Geo-Phase Environmental Inc. Phone(209) 569-0293 <br /> Modesto, CA 95356 Fax(209) 569-0293 <br />