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CENTRAL VALLEY REGIONAL WATER QUALITY CONTROL BOARD INSPECTION REPORT 7 June 1990 DISCHARGER: Dallas Corporation/ dba Overhead Door Company LOCATION & COUNTY: 1220 East Victor Road, Lodi , San Joaquin County CONTACT(S) : Alan Bashor, Charles Poole, C. Curtis Carter INSPECTION DATE: 11 April 1990 INSPECTED BY: Jean McCue ACCOMPANIED BY: OBSERVATIONS AND COMMENTS: On 11 April 1990, I observed the quarterly monitoring of wells at the Overhead/Lodi Door Company's (0/LDC) facility in Lodi . Brian Pletcher and Ed Keech from Remediation Services, Inc. (RSI) collected water samples and took water level measurements from the six wells at the facility. I collected split samples from four of the six wells for separate analysis. I arrived while Mr. Pletcher and Mr. Keech were setting up to purge monitoring well MW- 6. Prior to purging, Mr. Pletcher measured the depth to water with an electronic sounder and calculated the volume of water in the casing. MW-6 was purged with a four- inch Grundfos stainless steel submersible pump. At least three well volumes of water were purged from the well . The discharge water was pumped into 55 gallon drums. (Mr. Pletcher stated that the 0/LDC's practice has been to discharge the contents of the drums into the sewer, once they receive the sample results.) While purging, the pH, electrical conductivity (EC) and temperature of the water were monitored and recorded at regular intervals. After the pH, EC, and temperature readings stabilized, the pump was removed. Mr. Pletcher collected a water sample with a teflon bailer. The water was then pumped, by hand, through a 0.45 micron filter into a plastic sample bottle. Two samples were collected: one for pH, EC, and TDS analysis, and the other for metals analysis. The sample intended for metals analysis was preserved with HNO,. During purging and sampling of MW-6, Curtis Carter and Tom Lingard, from the 0/LDC stopped by. They informed me that someone from the City of Lodi would be coming by to observe the sampling of rain water that has collected in the excavation over the winter. Michael Schafer, from the City of Lodi , arrived shortly to inspect the impoundment and to observe the collection of the water samples. The water ponding in the impoundment was approximately four to six inches deep. The sidewalls of the excavation showed signs of erosion from the last two winters. Mr. Pletcher collected water from different locations in the impoundment and placed it in a container with a 0.45 micron filter and a hand pump. The water was then pumped through the filter, into plastic sampling bottles. Mr. Schafer said he would go back to the office to determine what analyses he wants to run on the water before they can discharge it into the sewer. He stated that the City has some reports containing laboratory results of the original waste in the impoundment. I told him we are only