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�• Ms Vicki McCartney Project No 880-040 lA/01070000 <br /> April 24, 2003 <br /> Page 4 <br /> sampling event are consistent with historical data TPHg concentrations have increased <br /> slightly since the first quarter 2003 Benzene and MtBE concentrations have generally <br /> declined since the first quarter 2003 <br /> RECOMMENDATIONS <br /> Shaw recommends continued monitoring of the existing five wells (MW-1 through <br /> MW-5) 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 <br /> at (916) 565-4377 <br /> Sincerely, <br /> ��REfJ GEp�G <br /> SHAW ENVIRONMENTAL, INC � p W. HF0.�� <br /> D G� <br /> r No.7211 <br /> i <br /> Benjamin Chevlen David W Herzog, R G 7211 <br /> Staff Geologist Project Manager `l�q <br /> OF <br /> Attachments Table 1 —Groundwater Analytical Data <br /> Figure 1 —Groundwater Elevation Contour Map, Second Quarter 2003 <br /> Figure 2 — TPHg/Benzene/MtBE Concentration Map, Second 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 James Barton,CRWQCB,3443 Routier Road, Suite A, Sacramento,CA 95827 <br /> Mr Jim Parkinson, 3250 West Hammer Lane, Stockton,CA 95209 <br /> • <br /> Shaw Environmental,Inc <br /> N IsacDP120031Prj188018800401A 3ab doe <br />