SITE INFORMATION AND CORRESPONDENCE_FILE 1

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Gillies Trucking 3931 Newton,Stockton Page 2 the no-purge method and one set of samples using the traditional purge method,in order to provide meaningful data for comparison. Analytical results of the water samples taken in October and June 1999 from the hand wash sink,which is supposed to represent the water from the domestic well on site (G-1),were 3,300 micrograms per liter(µg/1) and 510µg/l of total petroleum hydrocarbons as diesel (TPHd),respectively. Subsequently the water samples of G1 were taken from the tap after purging the reservoir connected to G-1 for at least 15 minutes. Latest analytical results of the G-1 sample collected in March 2001 were 64 µg/l TPHd. You are required to collect split samples from G-1 to be submitted to different laboratories for comparative analyses. If possible,use a micro-bailer through the chlorinating port at the well head rather than from the tap at the reservoir. Perform this task at the second quarterly sampling event of 2001 but no later than June 30, 2001. You are also required to collect and analyze water samples biannually from the domestic well at the Bardot property. You are required to sample the Bardot well at the second quarter sampling event of 2001 but no later than June 30,2001,since the last time the well was sampled was in 1999. If the direction of groundwater flow changes so that the Bardot well could potentially be impacted from the TPHd contamination,you will be required to sample the well on a quarterly basis. If you have any questions,please feel free to contact Jeffrey Wong at (209) 468-0335 Donna Heran,RENS,Director Environmental Health Division A�— ision /� /&'c W � Jeffrey Wong , Senior RENS Dot Lofstrom,RG LOP/Site Mitigation Unit IV LOP/ Site Mitigation Unit IV c: RWQCB, Central Valley Region- Mark List c/fax: Upgradient Environmental- Victor Cherven