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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO. <br /> CHEVRON PIPELINE COMPANY <br /> ALDEN PARK PROPERTY <br /> TRACY, SAN JOA UIN COUNTY <br /> Q <br /> n' <br /> Y <br /> Petroleum hydrocarbons contaminate the soil and exist as free product o cthe ter <br /> at the former Chevron site at Alden Park in Tracy. Prior to Montt"''on, plans anal pecifications <br /> for groundwater monitoring and/or extraction wells shall,06 submAted to Board stake dor rev <br /> and approval. After construction, new wells are to be s&mpletf' n auq zed for the cdiisltivents <br /> below and added to the monitoring program. lk <br /> R: <br /> GROUNDWATER MONITG 1?G a <br /> ` vt, <br /> There are 22 groundwater monitoring wells at the site as shown in Fi 're onitoring wells <br /> with free phase petroleum product or visible hsd8 k1l be monitored product thickness and <br /> depth to groundwater only. The groundwa� P monitors 1. gram for the wells, and any <br /> additional wells installed subsequently, ept"fa we coi3Ialniitg free phase petroleum product <br /> or visible sheen shall include the folloM. <br /> u <br /> ung <br /> Pw <br /> EPA Preparation anit MaXimtlm Detection <br /> Constituents Analyl'cal Methods" it ' Sampling Frequency <br /> Benzene5030/.020 0.3 <br /> �;. �. Quarterly <br /> Toluene r 496/8020 0.3 Quarterly <br /> Ethylbenzene 5;hkQ <br /> 0.3 Quarterly <br /> XF Quarterly <br /> YA�xe., 5030/8020' 0.6 <br /> CPH as Gasoline ,030/ of"M 50 Quarterly <br /> IM <br /> as Diesef`�z 3510MOB/8015M 50 <br /> a� �h> Quarterly <br /> Z ' s:�rudeOil "k, 1510/3630B/8015M 50 Quarterly <br /> �Poly&clear' Tomatic �J- <br /> s Hydro�c14bons',, 8310 .01 to 0.7 Quarterly <br /> gad2 239.2 15 Quarterly <br /> For nondetectable results. <br /> s If lead is not detected during the fust round of sampling,then no further analyses for lead are required. <br />