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Third Quarter 1995 Monitoring and Sampling Report 2 <br /> • The Southland Corpondion,455 Grant Line Rd Tracy,CA October 10 1995 <br /> I <br /> measurements are presented in Table 1 (Attachment 2) Field Data sheets are included in <br /> Attachment 3 <br /> Monitoring Well Sampling and Analytical Results <br /> Groundwater samples were collected from wells MW-4,MW-5, MW-8, MW-9,MW-10, and GWE-1 <br /> Before sampling, at least three well-casing volumes of groundwater was removed from each of the <br /> monitoring wells, unless the wells were purged dry Field measurements of temperature, conductivity, <br /> and pH were recorded during well purging The groundwater samples were collected using disposable <br /> bailers and placed in analysis-specific sample containers with analyses-specific preservatives The <br /> samples were then sealed and labeled with the job identification number,the sample number,date, <br /> time,and type of laboratory analysis required The samples were stored on ice in an insulated <br /> container and transported under chain-of-custody manifest to GTEL Environmental Laboratories, Inc in <br /> Concord, California The groundwater samples were analyzed for BTEX and TPH-G using <br /> Environmental Protection Agency(EPA) methods 8020/modified 8015 <br /> Dissolved hydrocarbons were detected in groundwater samples from wells MW-8,MW-9, and MW-10 <br /> (Table 1,Attachment 2) Dissolved benzene and TPH-G concentrations were greatest in groundwater <br /> from MW-10 at 12,000 parts per billion (ppb) and 43,000 ppb, respectively(Figure 3,Attachment 1) <br /> The laboratory analytical reports and the chain-of-custody records for the September 19, 1995 <br /> • sampling event are included in Attachment 4 <br /> Please contact Groundwater Technology's West Sacramento office if you have any questions or <br /> comments regarding this report <br /> Sincerely, <br /> Groundwater Technology,Inc Groundwater Technology, Inc <br /> Submitted by Approved By <br /> Bruce D BealeG� Brian H Garber <br /> �� <br /> Associate Geologist ni �(d Environmental Geologist <br /> JAMES W �,� Project M@naLLer <br /> C GRA51Y ''' <br /> 1/4 <br /> �t <br /> No.6102 <br /> James W Grasty, R G <br /> Attachments <br /> ^9 OF CSenior Geologist <br /> I Figures <br /> 2 Table 1 <br /> 3 Field Data Sheets <br /> 4 Laboratory Analysis Report <br /> atosoM RPT(ML s) <br /> ❑❑N GROUNDWATER <br /> ❑❑❑TECHNOLOGy <br />