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I <br /> Ms Vicki McCartney Project 880-040 1A/0107 <br /> 16) February 3, 2003 <br /> Page 4 <br />' CONCLUSIONS <br /> Groundwater levels have increased approximately 0 55 feet since the fourth quarter 2002 <br /> sampling event Generally, groundwater analytical data for the first quarter 2003 sampling <br /> event are consistent with the fourth quarter 2002 results <br /> RECOMMENDATIONS <br /> rShaw recommends continued monitoring of the existing five wells (MW-1 through MW-5) <br /> to further evaluate the dissolved hydrocarbon plume at the site <br /> If there are any questions regarding the contents of this report, please call David Herzog at <br /> (916) 565-4377 <br /> Sincerely, q�R@D GFQ�o <br /> SHAW ENVIRONMENTAL, INC ,v ��� �p u'1, <br /> �. No.7299 �r <br /> David W Herzog, R G 7211 OF `1�4�i� <br /> Project Geologist <br /> Attachments Table 1 — Groundwater Analytical Data <br /> Figure 1 — Groundwater Elevation Contour Map, First Quarter 2003 <br /> Figure 2 —TPH-g/Benzene/MtBE Concentration Map, First Quarter 2003 <br /> Attachment A— Field And Laboratory Procedures <br /> Attachment B — Certified Analytical Reports, Chain-of-Custody <br /> Documentation, and Field Data Sheets <br />' cc Mr Jim Parkinson, 3250 West Hammer Lane, Stockton, California <br /> Shaw Environmental,Inc <br /> N\sac DP�2003TYj\880%80040[A 3aa doc <br />