Laserfiche WebLink
' Ms. Linda Turkatte Project OF90-002.03 <br /> January 27, 1993 <br />' Page 3 <br /> wells. Monitoring wells MW-12 and MW-13 are shown on Drawing 1. During <br /> these activities, residual petroleum hydrocarbons were found in soil in the vicinity <br /> of the former tank complex, and petroleum hydrocarbons were also detected in <br /> groundwater samples from wells MW-10, MW-11, and MW-13. The highest <br /> concentrations were detected in the sample from well MW-13, located immediately <br /> adjacent to the former tank complex. <br /> SUMMARY OF FOURTH QUARTER 1992 ACTIVITIES <br />' During the fourth quarter of 1992, EMCON Associates conducted the following <br /> activities at the site: <br />' 1. conducted a soil vapor extraction test (SVET) on <br /> October 13, 1992 <br />' 2. conducted the fourth quarter 1992 groundwater monitoring <br /> event on December 3, 1992 <br /> 3. submitted the Problem Assessment Report and Final <br />' Remediation Plan (PAR/FRP) on December 16, 1992 <br /> Following completion of the soil and groundwater characterization activities, which <br /> were completed during the third quarter of 1992, EMCON Associates conducted <br /> a SVET to determine whether soil vapor extraction (SVE) would be a feasible <br /> method of vadose zone soil remediation. Details regarding completion of the <br />' SVET, including results and recommendations, are presented in the December <br /> 1992 PAR/FRP. <br />' GROUNDWATER SAMPLING AND ANALYSIS <br /> Eight groundwater wells, MW-3 through MW-5 and MW-9 through MW-13, are / <br />' monitored at the site (see Drawing 1 for well locations). Monitoring well MW-1 is <br /> still present at the site; however, the casing is bent near the surface and <br /> groundwater samples can not be collected from the well. Groundwater sampling <br />' for the fourth quarter of 1992 was conducted on December 3, 1992, by EMCON <br /> Associates' field personnel using the methods and quality assurance procedures <br /> described in Attachment A. Groundwater samples were collected from wells <br />' MW-10 through MW-13. Monitoring wells MW-3 through MW-5 were dry, and well <br /> MW-9 was obstructed approximately 32 feet below the ground surface. <br /> The wells were checked for the presence of floating petroleum product; samples <br /> were collected, placed on ice, and transported with the appropriate <br /> chain-of-custody documentation to Columbia Analytical Services in San Jose, <br />' California. The samples were analyzed for TPHG and BTEX. The water purged <br /> from the wells was placed in properly labeled drums. <br /> pj010f9010f900020.3az <br />