SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

David Wang • • Page 10 12) page 3-27, paragraph 3 . 4 . 5. 4 : The RI report states that the monitoring well cluster consisting of LM63 , LM64 , and LM65 were screened to monitor the shallow, middle, and deep zone of the aquifer within the upper Tulare Formation. The reference to groundwater zones should be consistent throughout the RI report. On page 3-15, paragraph 3 . 4 . 1. 2 , the groundwater within the upper Tulare Formation in the Tracy area was described as two zones - a water bearing zone above the Corcoran Clay (that contains confined, semiconfined, and unconfined water) and a shallow unconfined zone. Clarification is requested. 13) page 3-27 , paragraph 3 . 4 . 5 . 5, lines 2 , 3 ,and 4 : The RI report states with reference to wells LM66 and LM67 : "These two wells were used to monitor downgradient migration of contamination previously detected within well cluster LM55, LM56, and LM57 . " The above statement is misleading. LM67 is screened at an elevation similar to LM55, but LM66 is not screened at an elevation similar to LM56 or LM57 . Clarification as to the meaning of the above quote is requested. 14) page 3-27 , paragraph 3 . 4 . 5. 5, line 6: There are apparently two typographical errors on this line. They are the following: o The 113 . 9 ppb" PCE should be ND PCE. 0 13 ua/l should be reported for LM67 instead of "nothing" . 15) Section 3 . 5 Characterization of Contaminants in Groundwater paragraph 3 . 5. 1, page 3-32 and 3-33 : This paragraph describes and refers to Figures 3 . 5. 1, 3 . 5. 2 , and 3 . 5. 3 . This paragraph should be rewritten to describe the contaminant concentration values which are shown on the revised geologic cross-sections. 16) paragraph 3 . 5. 1, page 3-33 , lines 15, 16, and 17 : The RI report states: "The off-site well cluster shows a definite decrease in