SITE INFORMATION AND CORRESPONDENCE

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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION MONITORING AND REPORTING PROGRAM NO. FOR HERMAN & HELEN'S MARINA VENICE ISLNAD FERRY SAN JOAQUIN COUNTY Herman &Helen's Manna at 15135 Eight Mile Road in Stockton (site), is near the Little Connection Slough and is bounded to the east by an agricultural field, Eight Mile Road to the south, a levee to the west, and a parking lot to the north. In October 1991, five underground storage tanks were removed, only one, a diesel tank, had a hole in the bottom. Based on contaminated soil samples collected from the excavation, two site investigations were performed to delineate the contamination. Based on the second investigation, Board staff and the San Joaquin County Public Services/Environmental Health Department determined that the contamination was from above ground storage tanks being operated at the site. The site has three aboveground storage tanks, associated above- and below-ground piping, and four monitoring wells. This Monitoring and Reporting Program (MRP) is issued pursuant to Section 13267 of the California Water Code and is designed to delineate groundwater contaminant plumes and determine whether remediation efforts are effective. The Discharger shall not implement any changes to this MRP unless and until a revised MRP is issued by the Executive Officer. Prior to construction of any new groundwater monitoring or extraction wells, the Discharger shall submit plans and specifications to the Board for review and approval. Once installed, all new wells shall be added to the monitoring program and shall be sampled and analyzed according to the schedule below. GROUNDWATER MONITORING As shown on Figure 1, there are four groundwater monitoring wells. The groundwater monitoring program for the four monitoring wells and any wells installed subsequent to the issuance of this MRP, shall follow the schedule in Table 1 and the analytical program in Table 2. Monitoring wells with free phase petroleum product or visible sheen shall be monitored for product thickness and depth to water only. Sample collection and analysis shall follow standard EPA protocol. TABLE 1 SAMPLING FREQUENCY' Quarterly Semi-annually' Wells MW-2,MW-3,MW-4, island drainage channel, MW-1 drainage ditch,and New Wells `All wells will be monitored quarterly for water levels and the presence and thickness of free product.