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TWA <br /> ENVIRON ENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> Unit Supervisors <br /> Donna K.Heran,R.E.H.S. <br /> Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> Mike Huggins,R.E.H.S.,R.D.I. <br /> ' `. <br /> At Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W.Wilson,R.E.H.S. <br /> �.. P Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Q�ic oai> Laurie A.Cotulla,R.E.H.S. Robert McClellan,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Mark Barcellos,R.E.H.S. <br /> MAY 19 2003 <br /> KEN GILLIES <br /> GILLIES TRUCKING <br /> P O BOX 8303 <br /> STOCKTON CA 95208 <br /> RE: Gillies Trucking SITE CODE: 1703 <br /> 3931 Newton Road RO: 0264 <br /> Stockton, CA 95205 <br /> San Joaquin County Environmental Health Department (EHD) has received and <br /> reviewed First Quarter 2003 Report (QR), dated 09 April 2003, prepared by your <br /> consultant Upgradient Environmental Consultants (UEC), and comments as <br /> follows: <br /> Due to a reported electrical problem, the monitoring wells were not purged during <br /> the first quarter monitoring event. UEC comments that there was no statistically <br /> significant effect on diesel concentrations resulting from not purging the wells. <br /> UEC cites the results from GT-6 samples from June 2001 to the first quarter <br /> 2003 to demonstrate the case. It should be noted the results for the same limited <br /> time frame for GT-5 samples can be interpreted to indicate a different trend. In <br /> any case, EHD believes the population of values for the time frame is too small to <br /> determine statistically whether the diesel concentrations from purged vs. <br /> unpurged wells have significant differences or not. <br /> EHD accepts the data from the 27 March 2003 sampling event in view of the <br /> reported electrical problem, but to be clear, EHD is not approving a change in the <br /> current monitoring program, which includes purging of monitoring wells prior to <br /> sampling. Mr. James Barton of the Central Valley Regional Water Quality Control <br /> Board (CVRWQCB) note to EHD that the CVRWQCB requires purging of wells <br /> prior to sampling. <br /> Also, please note that laboratory analytical results for your site are not being <br /> electronically submitted to GeoTracker, the State Water Resources Control <br /> Board database program. This is required by Water Code Section 13196, which <br /> is commonly referred to as AB 2886. Electronic transmission of laboratory <br /> analytical results to GeoTracker must be initiated immediately. <br />