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i t <br /> CHRONOLOGY <br /> FORMER NELSON READY MIX <br /> 2059 NAVY DRIVE <br /> LOP SITE CODE: 1199 <br /> CVRWQCB CASE# 390887 <br /> APN: 16331007 <br /> 02/21/1995 One 4,000 gallon underground storage tank(UST) used for diesel fuel#2 <br /> was removed on this date. Two soil samples were collected beneath the <br /> UST at 13 feet below ground surface (bgs) and one soil sample was <br /> collected beneath the dispenser at 4 feet bgs. <br /> 05/03/1995 On this date EHD file an Unauthorized Release Report and a Notification r <br /> of Hazardous Waste Discharge after receiving positive analytical results <br /> for diesel in the three soil samples collected at the time of the UST 1 <br /> removal. The.dispenser was located approximately 5 feet south of the UST <br /> and evidenced the highest level of diesel contamination at'4 feet bgs. <br /> 08/08/1995 Environmental Health Department(EHD)placed this site into the Local <br /> Oversight Program on this date and a Notice of Responsibility was sent to <br /> the responsible party. <br /> 02/20/04 On this date the UST and dispenser area was over,excavated to I0.feet bgs <br /> and.4 sidewall soil samples and one groundwater sample were collected <br /> for analysis. Two of the soil samples results and the water sample result <br /> were positive for low concentrations of TPH=diesel. No other <br /> contaminants tested for were detected. <br /> 03/08/2004 Date of the H2OGEOL'S Report of Former Diesel Tank Removal and Pit <br /> Water Sampling which contained analytical results forthe first phase of <br /> excavation completed 2/20/04. <br /> 2/10/05- A second phase of excavation to enlarge the former UST pit was <br /> 03/16/05 completed during this time with EHD oversight. Additional contaminated <br /> soil (approximately 300 cubic yards) was removed to 19 feet bgs and <br /> approximately 18,874 gallons of water were pumped into a Baker tank. <br /> One soil sample at 19 feet bgs and one water sample were collected for <br /> analysis. The soil sample results at 19 feet bgs were below detection <br /> limits (ND) and the water sample result was .9 mg/L TPH-diesel. No <br /> other contaminants tested for were detected. H2OGEOL's performed this <br /> work and submitted the EDF information to Geo-Tracker,but a complete <br /> report was never submitted. <br /> 11/21/2005 By this date the UST excavation had been backfilled and a self directed <br /> Environmental Site Assessment phase II had been conducted by Arcadis <br /> Environmental. Three geoprobe soil borings were completed in the area <br />