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Austin Unit Groundwater Monitoring Network
<br /> Monitoring Point Monitoring Point I.D.
<br /> Groundwater Monitoring Well-Background AMW-2
<br /> DMP Wells AMW-6,AMW-7,AMW-12,AMW-13,AMW-14
<br /> CAP Wells AMW-1,AMW4,AMW-5R,AMW-10,AMW-11,
<br /> AMW-18,AMW-19,AMW-19BR
<br /> EMP Wells AMW-13/13B,AMW-1813,AMW-21/215,
<br /> AMW-22/22S,AMW-23/23S,AMW-24,AMW-25,
<br /> AMW-26,AMW-28,AMW-29,AMW-30
<br /> Domestic Wells 7898-A,8106-A
<br /> Surface Water Stations ASW-1,ASW-2
<br /> 1.2 COMPLIANCE RECORD
<br /> The Forward Landfill has been operated primarily as a Class II and Class III landfill since
<br /> it opened in 1973. From the late 1970s to 1984, industrial wastes, consisting primarily of
<br /> strontium and barium sludge, were accepted at the landfill and placed in Waste
<br /> Management Unit A (WMU A). In 1984,the DTSC determined that WMU A should be
<br /> closed as a hazardous waste management unit. The final cap was completed in 1989
<br /> (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 This modification superceded all of the requirements of the initial post-closure permit and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 groundwater monitoring wells AMW-13,
<br /> AMW-13B, AMW-18B, AMW-21, AMW-21S, AMW-22, AMW-22S,AMW-23,
<br /> AMW-23S, AMW-24, AMW-25, AMW-26, AMW-28,AMW-29, and AMW-30 to help
<br /> define the vertical and lateral extent of VOCs in groundwater downgradient of the Austin
<br /> Road Unit.
<br /> ®:U011 0050\FA 1QILdoex
<br /> 2 Geologic Associates
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