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MON!"NOAM S Jim Thorpe oil, Inc. 351 N. Beckman Road 0 P,O, Box 357 a Lodi, CA 95241 (209) 3886175 0 (209) 462-4581 Cantrector's License 1495699 July 17, 1989 San Joaquin Local Health District 1601 E. Hazelton Avenue .ot P. 0. Box 2009 Stockton, CA 95201 Attention: Ron Valinoti Gentlemen: Re: Project at it W. Turner Road, Lodi, CA In response to your letter dated July 7, 1989, the property owners are submitting a detailed drawing of the site excavation showing the location of the soil boring and monitoring wells installed by Groundwater Technology, Inc, The drawing also shows the dimensions of the current excavation and the location of the closest industrial well on the property, There are two more industrial wells within 100 feet and all three are idle and ready to be closed permanently. Prior to closure, a water sample will be taken for analysis from each of the wells. - Our additional sample plan is to: First: Take a water sample from the existing water in the excavation. Then to pump the water into the diked settling pond on site and take an additional sample from the water in the excavation when it is approximately half empty. Then pump the balance of the water into the settling pond. The pumped out water will be left to evaporate in the pond. Levels of water in the industrial wells can be measured when taking water samples; however, monitoring wells #1 and #3 were hiddenunder piles of rubble and soil during demolition and excavation. Only monitoring well #2 is accessible at this time and the level couid be taken in it and the industrial wells for determining hydraulic connection. Regarding monitoring well samples: We feel that since no sign of ground water contamination was found in the original site analysis; the water samples from the open excavation, the industrial wells, and rnanitoring well #2 should prove whether or not there is any contamination. Second: After the water is pumped out, we will proceed to take 16 bottom sim at the points shown on our drawing, ples Third: Side wall samples will be taken starting at 5 feet up from the bottom and continuing up at 5 foot intervals (i.e. Below Grade: 40' , 35 , 30', 251, 20', 15', 10', 5'), in approximately a verticle line on all four sides of �- the excavation. The sidewall samples taken at 40' and the bottom samples will be analyzed first so a determination can be made regarding the need to analyze the shallow side wall samples.