SITE INFORMATION AND CORRESPONDENCE_1993-1996

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Clothing went into the machine dry and dirty, and it was removed dry and clean. All PCE used in the process was stored in tanks along the base of the machine. The new machine recycled the PCE from the cleaning process and used a total of 12 paper cartridge filters a year. After the filter cartridges were removed from the machine, they were dried in a cartridge drier and placed in drums to be removed from the site. Distillation of the PCE resulted in the collection of a sludge containing residual oils and solids. This sludge was removed from the machine and placed into drums for removal from the site. All waste generated at the site was stored indoors until it was removed by Safety Kleen, a hazardous waste hauler. Water collected from the process was allowed to evaporate into the atmosphere. According to the site owner, no wastewater was discharged into the city sewer system from this system. The dry-to-dry system used approximately 120 gallons of PCE annually. (3, 5) In January 1992, Lincoln Village Cleaners stopped all dry cleaning operations at the site and the Frimair machine was removed. The site currently operates as a d op-off point. All dry cleaning is performed at a different location, and the cleaned clothing is returned to the site for pickup by the customers. Current operations at the site include the drop-off service, an ironing and pressing service, and a clothing repair service. Lincoln Village Cleaners employs 10 people and operates 6 days a week. No hazardous substances are currently generated or stored on site. (3) 2.4 Regulatory Involvement 2.4.1 U.S. Environmental Protection Agency (EPA). The Lincoln Village Cleaners site, included as a part of the site identified as Lincoln Center, was entered in CERCLIS on August 25, 1992 (1). Lincoln Village Cleaners was listed in the Resource Conservation and Recovery Information System (RCRIS) database on December 12, 1986 as a large quantity generator(6). 2.4.2 California Environmental Protection Agency Regional Water Quality Control Board (RWQCB), Central Valley Region. The RWQCB became aware of the site when the San Joaquin County Public Works Department forwarded sludge sampling results from the sewer manholes downstream of the three Lincoln Village Shopping Center dry cleaners. Results from the initial sampling in April 1985 indicated PCE concentrations of 283 micrograms per liter (µg/1), 580 µg/1, and 1,180 µg/1. Results from later sampling in August 1985 indicated lower PCE concentrations of 18.1 µg/1,71.7 gg/l, and 1.68 µg/I of TCE. (7, 8) In early 1987,the owners of Lincoln Village Shopping Center,Lincoln Properties,Ltd., contracted with Leedshill-Herkenhoff, Inc. (LH) to evaluate the soil and groundwater conditions near the shopping center. This evaluation included the Lincoln Village Cleaners site. LH prepared Phase I of a three-phase study to evaluate the problems at the site. Phase I was initiated to conduct a hydrogeologic investigation of the soil around the suspected sewer lines and the shallow groundwater. In 1990, Lincoln Properties, Ltd. contracted with Kennedy/Jenks Consultants to complete the study at the Lincoln Village Shopping Center. Phase II was designed to further define the lateral extent of PCE groundwater contamination and to sample and examine the suspected soil contamination around the onsite sewer lines. The purpose of the Phase III investigation was to further study the groundwater conditions near the site with the addition of several groundwater monitoring wells. (9, 10, 11) The RWQCB reviewed and directed this site investigation (11). Under RWQCB direction,eleven groundwater monitoring wells were installed on and around the Lincoln Village Shopping Center. Soil samples were collected during the PA Unwin Maps CleanerrV (F) . SIDS 5 Printed w 50% recycled paper. 1�9