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APEX781,E N V I R O T E C H INC , 44 Madison AY�nle,Suites •Ta?Oaks,CA 95628 I.&00.242.5249 • Ph.416.535.0200 • Fax 916.535.0207 JJ 1 I� November 17, 2000 I Mr. Jerry Moore Moore Petroleum 5491 F Street Banta, California Subject: Workplan for Interim Remediation & 1 41n Quarter 2000 Groundwater Monitoring Report Moore Petroleum Bulk Plant 5491 F Street Banta, California E Apex Project# ERA02.004 i F Dear Mr. Moore: ; 1 4 Apex Envirotech, Inc. (Apex), is pleased to provide Moore Petroleum (Moore) this Workplan for the installation of a soil and groundwater interim remediation system at the subject site (Figure ` 1). This report also presents the results of the 4th Quarter 2000 Groundwater Monitoring Event. This Workplan was perpared in response to the groundwater analytical results collected on October 27, 2000 and a letter from San Joaquin County Environmental Health Division(County) dated November 13, 2000. A copy of the County's letter is presented in Appendix A. Groundwater samples were collected from the 12 monitoring wells and from an off-site supply l well on October 27, 2000 (Figure 2). The results indicted methyl-tert butyl ether(MTBE)was present in the off-site supply well(Rhodes Well) at 14 parts per billion (ppb). Apex re-sampled the Rhodes well on November 8, 2000 and the results were below laboratory detection limits.for 1 gasoline and MTBE. Apex re-sampled the Rhodes well and the domestic well immediately east II of the Rhodes well (Marty well) on November 13, 2000. The results of the November 13,,2000 r sampling were all below laboratory detection limits for the two wells. The groundwater x analytical results are summarized in Tables 2 and 3. Apex also performed a door-to-door well search of a 2000-foot radius around the site on November 13, 2000. Results of this detailed well search are presented in this Workplan.