SITE INFORMATION AND CORRESPONDENCE

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to California Regi nal Water Quality Control trol Board f :, Central Valley Region ' tt Winston H.Hickox Robert Schneider,Chair Gray DavisD Secretaryfor Sacramento Main Office Governor Environmental Internet Address: http://www.swmb.ca.gov/rwgcb5 Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 Phone(916)255-3000•FAX(916)255-3015 31 October 2001 Mr. Arnold Hof — ('agot 28537 E. River Road Escalon, CA 95320 MEETING SUMMARY, 23 OCTOBER 2001, FORMER CAL FARM SUPPLY, SAN JOAQUIN COUNTY Thank you for coming to Sacramento and discussing your plans for the former Cal Farm Supply site in Stockton with Ms. Wendy Cohen and me. It was a pleasure to meet you. The highlights of our discussion are as follows: • The property that you own includes 290 feet of frontage along Washington Boulevard and extends 363 feet south towards Sonora Avenue. The seasonally ponded area where MW-6 was located is not on your property, and the eastern portion of the former Cal Farm Supply property containing MW-8 belongs to another property owner as well. • The primary groundwater contaminant is nitrate. The maximum concentration appears under the seasonal ponded area south of the facility, on the north side of Sonora Avenue. The pesticides benzene hexachloride (lindane) and dinoseb were detected regularly in MW-3, but not in the other monitoring wells. You noted that MW-3 was just outside the back entrance to the warehouse (this entrance has been removed). Board staff files show that in the early 1990s soil in this area was remediated to staff satisfaction. • Revised Monitoring and Reporting Program No. 97-812 (MRP) requires two sampling events per year. Pending review of the results of the next sampling round, it may be appropriate to revise the MRP to reduce the frequency and scope of monitoring requirements. You agreed to sample all the monitoring wells as required by the MRP this fall, noting that it is difficult to sample during the spring season, since this area often becomes inundated with water. • You reported that you planted safflower in the southern portion of your property for the purpose of consuming nitrogen from the shallow groundwater. You also offered to plant a row of trees along the downgradient (eastern) boundary and along the western property boundary(adjacent to MW-3). We concur that phytoremediation with crops and/or trees are California Environmental Protection Agency Qd Recycled Paper The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/mgcb5