ARCHIVED REPORTS XR0005779 - Laserfiche WebLink

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• equipment or in the laboratory As a precautionary measure, the analyses of water samples from the 2/96 event were performed by Sherwood Labs, Inc As summarized on TABLE I and shown on laboratory sheets included with this report, both wells were non-detect for all tested compounds 4 PLATES II through VI show the estimated lines of equal concentration of benzene, ethylbenzene, toluene, xylene, & TPHg based on the latest test results They generally follow the same pattern shown in the WJH report dated January 12 ' 1996, which covered the soil/groundwater investigation performed 1995, and quarterly monitoring in December, 1995ReferOtoothat report for more details . CONCLUSIONS - 1 The limits of the soil & water plumes have been defined in all directions 2 The groundwater plume has migrated no more than 100 feet to the north and 125 feet to the west of the site of UST' s, which were removed in 1989 . The highest levels of BTEX & TPHg have consistently been recorded from MW-1, indicating that there has • been very little movement of the contamination. 3 Additional investigative work is not required RECOMMENDATIONS : 1 It is recommended that measurement & sampling of MW-1, MW-2, & MW-3 be changed to a semi-annual schedule 2 . It is also recommended that sampling of MW-4 & MW-5 be discontinued, but water level measurements should be taken in conjunction with sampling and analysis of MW-1, 2 , & 3 3 We believe there is sufficient information available so that an efficient, cost effective remediation system can be designed and installed to reduce soil and water contamination to acceptable levels If your office agrees with this assessment, we will prepare a bid package to send to qualified firms for recommendations for remediating the site Your timely review and response to this report will be greatly appreciated SCJ � Wm unter & Associates cc • nchez RW CB �p 7 2 No 860 OF CAL1E