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Austin Unit Groundwater Monitoring Network
<br /> Monitoring Point Monitoring Point I.D.
<br /> Groundwater Monitoring Well AMW-2
<br /> -Background
<br /> DMP Wells AMW-6,AMW-7,AMW-12,AMW-13,AMW-14
<br /> CAP Wells AMW-1,AMW-4,AMW-5R,AMW-10,AMW-11,AMW-18,
<br /> AMW-19,AMW-19BR
<br /> EMP Wells AMW-1313,AMW-1813,AMW-21/21S,
<br /> AMW-22/22S,AMW-25, AMW-28,AMW-29/29S,AMW-30/30s
<br /> Domestic Wells 7898-A, 8106-A
<br /> Surface Water Stations ASW-1,ASW-2
<br /> 1.2 COMPLIANCE RECORD
<br /> With the exception of Waste Management Unit(WMU) A, the Forward Landfill has been
<br /> operated as a Class II and Class III landfill since it opened in 1973. However, from 1979
<br /> to 1984, industrial wastes, consisting primarily of strontium and barium sludge, were
<br /> accepted at the landfill and placed in WMU A. In 1984, the DTSC determined that
<br /> WMU A should be closed as a Class I hazardous waste management unit. The final cap
<br /> was completed in 1989 (Kleinfelder 1999).
<br /> A hazardous waste facility post-closure permit("the initial post-closure permit") was
<br /> issued for the Site on January 2, 1990. On February 25, 1994, Forward Landfill
<br /> requested that the DTSC modify the initial post-closure permit to reduce the number of
<br /> sampling events from eight per year(two quarterly)to four per year. DTSC approved
<br /> this request ("Modification No. I") in a letter dated March 2, 1994 (Kleinfelder 1999).
<br /> On November 4, 1994, a revised post-closure maintenance plan(RPCMP) was submitted
<br /> to the DTSC. The DTSC approved the RPCMP and issued Permit Modification No. 2.
<br /> This modification superceded all of the requirements of the initial post-closure permit and
<br /> Modification No. 1. The DTSC issued a revised Postclosure Permit on June 30, 2003.
<br /> Forward Landfill implemented the Corrective Action Program for the site, which was
<br /> based on a two-year proof period that began on June 7, 1995.
<br /> WDR Order No. R5-2003-0049 was formally adopted by the RWQCB on March 14,
<br /> 2003, which combined the former Austin and Forward Landfills into one landfill, now
<br /> known as the Forward Landfill.
<br /> In response to continued detection of VOCs in groundwater downgradient of the Austin
<br /> Road Unit, the RWQCB issued a Cleanup and Abatement Order(CAO) on December 8,
<br /> 2008. Under the CAO, Forward installed 16 additional groundwater monitoring wells
<br /> (AMW-13B, AMW-1813, AMW-21, AMW-21 S, AMW-22, AMW-22S, AMW-23,
<br /> AMW-23S, AMW-24, AMW-25, AMW-26, AMW-28, AMW-29, AMW-29S,
<br /> AMW-30, and AMW-30S) to help define the vertical and lateral extent of VOCs in
<br /> groundwater downgradient of the Austin Road Unit.
<br /> C:\2011-0050\FA_4QILdoc 2Geo-Logic Associates
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