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v MEMORANDUM CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD • CENTRAL VALLEY REGION 3443 Routier Road, Suite A Phone: (916) 255-3000 Sacramento, CA 95827-3098 CALNET: 8-494-3000 TO: Koppel Stockton FROM: Wendy Wyels Terminal file DATE: 9 March 1995 SIGNATURE: (updated 5 April) SUBJECT: COLLECTION OF SOIL AND WATER SAMPLES Soil and water samples were collected from the Koppel facility on 6 March 1995. Gail Wiggett and I collected the samples. Dave Marks from Weston observed our work and split all the samples. The soil was fairly moist due to recent rain; however, we weren't able to collect as many auger samples as I had wanted because the majority of the site is covered with hard-packed gravel and asphalt. The sampling equipment was cleaned with TSP soap and then DI water after each use. Samples were placed on ice immediately after collection. The following samples were collected: KOP-1. Collected from the soil below the southern-most overhead loadout on the west side of the warehouse. The top 4" of gravel was removed with a shovel, and then an auger was used to collect a sample from 4-6" bgs. The soil was SC/SM, moist. Nearby puddles contained algae. Photo #1. Analyzed for nitrate and ammonia. Results: 4700 ppm NO3-N and 2000 ppm N113N. KOP-2. A trowel was used to collect white granular material that appeared to have leaked out of the southern-most door on the west side of the warehouse. Photo #2. Analyzed for nitrate and ammonia. Results: 3400 ppm NO3-N and 2300 ppm NH3-N. KOP-3. Same location as KOP-1, but from 6-9" bgs. The soil is SC, somewhat moist, and compacted easily in the auger barrel. Analyzed for nitrate and ammonia. Results: 4000 ppm NO3-N and 2100 ppm NH,-N. KOP-4. Collected from the soil directly beneath the northern overhead loadout on the west side of the warehouse. The loadout is supported by a concrete pad which has been eroded along the west edge. An auger was used to take a 3-7" bgs sample from the soil next to the eroded portion of the concrete pad. Water filled the hole as we were auguring, so the sample contains some water. Photo #3, 4. Analyzed for nitrate and ammonia, both the soil and water fractions. Results: 41 ppm NO3-N and 1600 ppm NH3 N in the soil, and 41 mg/l NO3-N and 2100 mg/l NH3-N in the water. KOP-5. A trowel was used to collect black, discolored soil from in front of the northern-most doorway on the western side of the warehouse. Soil is SC, with an ammonia smell. A white granular material has also leaked outside of this door, but it was not included as part of this sample. Analyzed for nitrate and ammonia. Results: 4200 ppm NO3-N and 4300 ppm NH3-N. KOP-6. A trowel was used to collect a sample of a granular material which had been spill along the railroad tracks just west of the warehouse. Analyzed for general minerals, nitrate, ammonia, and total