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<br /> Re-Manufacturing, Ltd. -2- 26 June 1991
<br /> Inspection Report
<br /> the payment of a fine, TPCA fees, and staff costs; completion of a HAR; and
<br /> implementation of a closure plan.
<br /> In response to the ACL, 3 groundwater monitoring wells (MW-1, MW-2, and MW-3)
<br /> were installed in September 1990.
<br /> Dichloromethane (methylene chloride) was the only volatile organic reported in
<br /> the soil samples collected from the boring for MW-1. Sample results for the
<br /> split samples collected by the Board showed that soils collected at 25 and 30.5
<br /> feet below ground surface contained 1 .46 and 1.21 mg/kg dichloromethane,
<br /> respectively. (Split samples collected from 5 and 56 feet below ground surface
<br /> were not analyzed for volatile organics.) Dichloromethane was used in the
<br /> manufacturing of chemicals at businesses in Moore Industrial Park and is a very
<br /> mobile constituent.
<br /> The first round of water samples were collected from the three wells on 9 October
<br /> 1990 and 22 April 1991 . Samples from all three wells were analyzed for major
<br /> ions, pH, EC, TDS, TPH extractable, priority pollutant metals, halogenated
<br /> volatile organics (601) , aromatic volatile organics (602) , and phenols (604) .
<br /> Chromium, copper, nickel , and selenium were detected in concentrations of 0.011,
<br /> 0.002, 0.005, and 0.002 mg/L, respectively, in the Board's November 1990 split
<br /> water sample collected from MW-1. In addition, chloroethane, chloroform, 1,1-
<br /> dichloroethane, 1, 1,1-trichloroethane, and vinyl chloride were detected at
<br /> concentrations of 0.8, 0.8, 1.6, 0.8, and 1.7 4g/L, respectively. However,
<br /> phenols and aromatic volatile organics were not present above laboratory
<br /> detection limits.
<br /> The second round of ground water sampling was conducted in April 1991.
<br /> Chloroform and 1,1 Dichloroethane were each detected at 1 .0 µg/L in MW-1 .
<br /> Arsenic was detected at concentrations of 8.6, 12, and 11 /fig/L, respectively,
<br /> in MW-1, MW-2, and MW-3. MW-2 also contained chromium and nickel in
<br /> concentrations of 34 and 58 µg/L, respectively. MW-3 contained chromium,
<br /> nickel , copper, and lead in concentrations of 36, 110, 25, and 44, respectively.
<br /> Nickel in MW-3 was above the MCL of 100 M g/L. The MCL's for arsenic, chromium,
<br /> and lead are all 50 µg/L. The MCL for copper is 1300 µg/L. Wells MW-1, MW-2,
<br /> and MW-3 exceeded the secondary drinking water standard of 500 mg/L for TDS, with
<br /> concentrations of 1000, 700, and 1100 mg/L, respectively.
<br /> Ground water at the site is roughly 60 feet below ground surface. The gradient
<br /> varies from a northeasterly to a southeasterly direction. It is very flat,
<br /> ranging from 0.0007 ft/ft to 0.002 ft/ft between November 1990 and April 1991.
<br /> OBSERVATIONS AND COMMENTS:
<br /> I conducted the TPCA annual inspection of the Re-Manufacturing facility on 3 May
<br /> 1991 . Ms. Nora Kataoka, from Water Work Corp. , and Mr. Stanley Moore were on
<br /> site during the inspection along with additional Water Work and Re-Manufacturing
<br /> staff. When I arrived on site, the sample locations were staked. Mr. Moore
<br /> stated that all of the sample locations would be surveyed by his construction
<br /> crew. A sampling plan had been FAXed to the Regional Board office at 3:30 pm on
<br /> 2 May 1991, the night before sampling commenced. Therefore, staff only had time
<br /> for a cursory review. I stated our concern that the sampling plan may not
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