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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO. 98-800 <br /> FOR <br /> AMERICAN SAVINGS BANK <br /> STOCKTON, SAN JOAQUIN COUNTY <br /> SITE BACKGROUND <br /> This monitoring and reporting program (MRP) is issued pursuant to Section 13267 of the California Water <br /> Code. Facility operations have resulted in total petroleum hydrocarbon(TPH) contamination of the groundwater <br /> beneath the facility. The extent of groundwater contamination has been sufficiently defined. This MRP is <br /> being issued to assess the impacts, if any, of residual soil contamination to groundwater and to evaluate the <br /> potential for migration or natural attenuation of the contaminated groundwater. <br /> Prior to construction of any new groundwater monitoring or extraction wells or any new vapor monitoring or <br /> extraction wells, American Savings Bank shall submit plans and specifications to the Board for review and <br /> approval. Once installed, all new wells shall be added to the monitoring program and shall be sampled and <br /> analyzed according to the schedule below. <br /> GROUNDWATER MONITORING <br /> There are four shallow monitoring wells at the site, as shown in Figure 1. The groundwater monitoring <br /> program for the four wells, and any wells installed subsequent to the issuance of this MRP, shall follow the <br /> schedule below. Sample collection and analysis shall follow standard EPA protocol. <br /> EPA Analytical Max. Detection Sampling <br /> Constituents Method Limit (pg/l)t Frequency <br /> Depth to Groundwater --- --- Quarterly <br /> Benzene 8020 0.5 Quarterly <br /> Toluene 8020 0.5 Quarterly <br /> Ethylbenzene 8020 0.5 Quarterly <br /> Xylenes 8020 2.0 Quarterly <br /> TPH as Gasoline 8015M 50 Quarterly <br /> TPH as Diesel 8015M 50 Quarterly <br /> Volatile Organic Compounds 8260 0.2 Quarterly <br /> Semi-volatile Organic Compounds2 8270 1.7-2.8 Quarterly <br /> Dissolved Cd, Cr, Ni, Pb, Zn2 200.9 0.3-2.8 Quarterly <br /> t For nondetectable results <br /> 2 From wells which have not been monitored for dissolved(filtered)metals. If dissolved metals are detected, American <br /> Savings Bank shall perform verification sampling within 30 days of submittal of the monitoring report. If the presence <br /> of dissolved metals is not confirmed,no further test is required. If pollution is verified, American Savings Bank shall <br /> continue quarterly monitoring for dissolved metals. <br />