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On June 21, 1996 groundwater samples were collected from monitoring wells MW 1, MW3 <br /> and MW5. Samples were collected after stabilization of pH, electrical conductivity (EC), and <br /> temperature. All wells monitored were purged and sampled according to Smith <br /> Environmental's Quality Assurance/Quality Control Plan on file with the PHS/EHD A <br /> minimum of four casing volumes of water were removed from each sampled well. <br /> Accordingly, monitoring well MW2 was purged but not sampled at the suggestion of the <br /> PHSIEHD regulator on-site due to the presence of a sheen on the water purged from the well <br /> A dedicated disposable bailer was used to collect each water sample. Purge water was <br /> contained in labeled DOT approved 55 gallon drums and stored on site pending laboratory <br /> analysis and proper disposal Field parameters and purged volumes are shown on well purge <br /> logs included in Appendix I <br /> LABORATORY ANALYSIS <br /> Collected groundwater samples were placed on ice and transported under chain-of-custody <br /> protocol to state-certified Argon Mobile Labs in Ceres, California (DOHS Certification No. <br /> 1873) Samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg), benzene, <br /> toluene, ethylbenzene, and xylenes (BTEX) by EPA methods 8015 modified and 8020, <br /> respectively. Analytical results for groundwater are summarized in Table 2 Laboratory data <br /> t. sheets and chain of custody documentation are included as Appendix II. <br /> Please contact our office at (209) 579-2221 if you have any questions or require additional <br /> information <br /> Respectfully Yours, <br /> Smith Environmental Technologies Corporation <br /> C)`. 0 UVB <br /> William Madison <br /> Staff Geologist <br /> rESSI <br /> Tom Lutterman <br /> Project Geologist � % JE l' <br /> Iii y- {1 l <br /> l-- <br /> ��111.f1� <br /> Jeanne Homsey, P E d e,n —✓~ _�z194___ a <br /> CA Registered Engineer C47410 <br /> Attachments <br /> 9433AQUARTLraQR 19%DOC 3 <br /> • <br /> SMTH <br />