|
0 0
<br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD
<br /> CENTRAL VALLEY REGION
<br /> MONITORING AND REPORTING PROGRAM NO. R5-2008-XXXX
<br /> CALIFORNIA WATER CODE SECTION 13267
<br /> FOR
<br /> WESTERN FARM SERVICE, INC., AND AGRIUM
<br /> STOCKTON FACILITY
<br /> SAN JOAQUIN COUNTY D
<br /> The agricultural chemical facility at 1905 North Broadway Avenue in Stockton was
<br /> owned by Unocal until February 1993, when the facility and its environmental liability
<br /> was purchased by Agrium (Discharger). The soil and groundwater are polluted with
<br /> fertilizers, fumigants, pesticides and herbicides that were discharged to on-site ponds.
<br /> Polluted groundwater is found at about 50 feet, 100 feet, and 150 feet below ground
<br /> surface. This pollution impaired the beneficial use of this water resource. The ponds
<br /> were excavated and covered with an engineered cap and liner. A pilot study is
<br /> underway evaluating the efficacy of zero-valent iron to remove groundwater
<br /> contaminants insitu.
<br /> This Monitoring and Reporting Program (MRP) is issued pursuant to Section 13267 of
<br /> the California Water Code and is necessary to delineate groundwater pollutant plumes
<br /> and determine whether remediation efforts are effective. Existing data and information
<br /> about the site show the presence of various chemicals, including 1,2-dichloropropane,
<br /> 1,2,3-trichloropropane, nitrate and ammonium, emanating from the property under the
<br /> control of the Discharger. The Discharger shall not implement any changes to this MR
<br /> unless and until a revised MRP is issued by the Executive Officer. This MRP replaces
<br /> the requirements listed in MRP No. R5-2004-0804, which was issued on 29 January
<br /> 2004.
<br /> Prior to construction of any new groundwater monitoring or extraction wells, and prior to
<br /> destruction of any groundwater monitoring or extraction wells, the Discharger shall
<br /> submit plans and specifications to the Board for review and approval. Once installed,
<br /> all new wells shall be added to the monitoring program and shall be sampled and
<br /> analyzed according to the semi-annual schedule below.
<br /> GROUNDWATER MONITORING
<br /> As shown on Figure 1, there are 17 monitoring wells, one extraction well, and two pilot
<br /> study test wells in the A-zone (MW-1, MW-2, MW-3, MW-5, MW-6, MW-8, MW-9,
<br /> MW-10, MW-12, MW-13A, MW-14A, MW-15A, MW-16A, MW-17A, MW-19A, MW-20A,
<br /> E-1, PM-1 and PM-2); eight monitoring wells and one extraction well in the B-zone
<br /> (MW-13B, MW-14B, MW-15B, MW-16B, MW-17B, MW-18B, MW-19B, MW-20B, and
<br /> E-2); and two monitoring wells in the C-zone (MW-7 and MW-21). The groundwater
<br /> monitoring program for the 27 monitoring wells, two extraction wells, two pilot study
<br /> wells, and any wells installed subsequent to the issuance of this MRP, shall follow the
<br /> schedules below in Tables 1 and 2. Analytical suites are found in Table 3.
<br />
|