Tony Greene

Thanks Tony. | really appreciate the info. Greg

Greg we started Sea Quest January 15. Chlorine residuals have averaged 2.35 throughout entire distribution. This took about three to four weeks. Caustic feed has been reduced 10%. Chlorine feed has been reduced considerable yet residuals have increased and stabilized. We had three automatic flushing devices where residuals were .5 to .8. These areas are now in the 2.35 range with no flushing, We tried Sea Quest for six months in 2003 and experienced the same results but because of cost we went to an | inferior phosphate. Greer Commission of Public Works has under gone an 8.5 million dollar distribution upgrade. Some 40 coupons | taken from mains showed no evidence of phosphate application. in 2003 we alse reduced ammonia feed by 15% and residuals L i remained stable. The short time we used Sea Quest in 2003 we saved about $12,000.00 in chemicals. | requested that Sea Quest | bid 2006 with savings included in bid document. So far | have been very pleased and our residuals have never been better.Asa | side note, Sea Quest does not make this claim but our TTHM’s first quarter were 0.012 and HAA’s were 0.015 and you know from | past experience how our first quarter results have been.

Tony, Do you guys feed Seaquest? One of our clients was thinking about switching to that chemical for corrosion control. The sales rep. piakes ‘ lot of claims about how well it works, but we wanted to check with some operators that have actually been working with it ra while. if you are using Seaquest, are you happy with it? Have you observed any major advantages or disadvantages? Has it affected your chlorine residuals or any other water quality data (changes that can be directly attributed to the chemical)? If you don’t use this product, then please disregard this email. Thanks, Greg Greg B. MeGlohorn, P.E. Project Engineer 8.P. Barber & Associates, Inc. Printed for Michael <[email protected]> 5/4/2006 xxxEND_PAGE:deq02_b216_2370_2887_183 Corrosion Control Project INTRODUCTION In an effort to limit the lead and copper contaminants found in the distributed water supply hee Water and Power Authority undertook the Corrosion Control Project, Assigned initially to the Environmental Affairs department this | endeavor grew to encompass personnel from the Maintenance, Water Distribution and Engineering departments in both districts united in a joint effort to bring four automated chemical injection systems on-line. The chemical in question is an orthophosphate based solution Seaquest which has been certified by the National Sanitation Foundation and approved by the Department of Planning and Natural Resources as a corrosion treatment. “Seaquest produces a mono molecular coating on the interior of piping in order to diminish pitting and reduce bio- film formations while sequestering lead and copper contaminants for later flushing. Manufactured and distributed by Aqua Smart, Inc. of Atlanta Georgia the Seaquest injection process has proven successful at several distribution systems throughout the world. England, Brazil, South Africa and New Mexico are all reported to have Seaquest treatments in operation within their boundaries. Design Methodology The chemical injection system design was formulated solely by the Engineering and Environmental Affair departments. Two systems were specified for ay distribution system to meet the need of the two separate 16” and 24” systems (an upcoming project). Likewise two systems one treated the desalinated and well water systems, xxxEND_PAGE:deq02_b216_2370_2887_184 83-21-99 Pe ey se] Project Schedule The Authority ‘was mandated by the Department of Planning and Natural Resources to complete installation and begin application of the corrosion control treatment within ninety (90) working days following the receipt of written approval. This approval was received by the Executive Director's office on January 24, 1998 determining a start up date of no later than June 8, 1998. Despite several construction delays the first system was energized and treatment initiated on May 4, 1998 | Pump Station orf aaa. The second system on (gaat was installed and placed in a stand by status, while bothggemesystems have been brought online. Refer to Figure 1,1 the ‘As Built’ schedule for further detail, Operations Ideally, it is intended that the corrosion control system operates with a minimum of manual support, In fact, once the chemical in its powder form, is mixed and transferred to the injection tank it is expected that the system will operate in automatic for approximately 2 - 3 days at a time, even to the point of notifying the operator when a new mixture is necessary, Several alarms and fail-safes and have been configured into the system to avoid equipment damage or operator injury. Additionally, all operators of both Water Distribution departments partook in a two and a half-day training seminar held by the system’s designers, During these sessions a review was made of the Material and Safety Data Sheets of all pertinent chemicals and the proper safety procedures were demonstrated for all required services of the operator(s), xxxEND_PAGE:deq02_b216_2370_2887_185 Once chemical mixture is accomplished the injection pumps electronically controlled by the procéss ene station increases or decrease the injection stroke percentage to supply 0.5 ppm of phosphate in the system. The phosphate analyzer monitors a sample taken from the distributed water, and supplies a signal to the process control station. Simultaneously, the water flowmeter provides a like function for the water flow parameters of the system. Auxiliary transmission furnishes output readings a system recorder and alarm announcer. Treatment Through the operational procedure described Seaquest treatment has been in progress in ees for nine nionths. The manufacturer has recommended that systematic flushing procedures be implemented after approximately six to twelve months of treatment at the present rate of injection. Additionally, system monitors were installed to detect concentrations at remote locations. This was to verify treatment throughout the systems entirety. Chart 1.3 below displays the residual phosphate concentration at remote (sample points farthest from injection) locations. Chart 4.3 Remote location phosphate residuals > OS we oe Chtaee ee Fe aw xxxEND_PAGE:deq02_b216_2370_2887_186 Though the majority of these concentrations varied from 0.2 to 1.6 mg/l. Readings clearly indicate that the treatment is reaching the furthest points in the system at the recommended désages. Conclusions After successful implementation, thames W ater end Power Authority is now in compliance with the Environmental Protection Agency and the Department of Planning and Natural Resources consent decree. With al] departments working collectively the project wes completed within the allotted time. The Authority subsequently realized tremendous savings between the estimated cost and the actual cost. The final evajuation however relies on the results of the corrosive, lead and copper contaminant testing to be performed March 1999. xxxEND_PAGE:deq02_b216_2370_2887_187 SSE eS SS a SD oe ne rosin adietiae tt UY AVENE NS Et VIRGIN ISLANDS on ann POWER AUTHORITY /y eg }OX 1450. ST. THOMAS US. WGIN ISLANDS d0804. 1450 . TELEPHONE: (3411) 774.3552 FAX. (94) 776 2723 July 12th. 1999 Christine Lottes, PWWS Department of Planning and Natural Resources Division of Environmental. Protection Government of the Virgin Islands 1118 Watergut Homes Christiansted St, Croix, V.I. 00820 Dear Ms, Lottes, Enclosed please find the calculated 90th percentile values of Lead and Copper content in distributed water from. the St. Thomas system, located in the category Tier 3. Of the 60 sample sites only 13.3% were collected from the same location as the initial survey in 1993. Statistical account for the 60 sample sites are as follows: 26 (43.3%) Single Family Resident (SFR) before 1983 14 with cisterns attached. 5 ( 8.3%) Single Family resident (SFR) after 1982 1 with cistern attached. 29 (48.3%) Multi Family Bldg. 27 with cisterns attached. A total of 70% of the 60 sample sites were connected to a cistern, : a xxxEND_PAGE:deq02_b216_2370_2887_188 Cc. Lottes, PWWS page 2 July 12th 1999 Also attached is a map of the St. Thomas distribution system with sample site locations. Please call me if you have any questions at 774-3552 ext, 2313, sincerely /f a aclu @lise Knudsen Laboratory Supervisor cc: Martin Ramirez, Superintendent of Water Distribution Greg Rhymer, Manager Environmental Department Carol Aubin, DPNR/DEP. St. Thomas xxxEND_PAGE:deq02_b216_2370_2887_189 Trt ans St aS stab ee cea CSN ARS AEE AN LID OTE OL SOTN SETS RES SSE Ot ents eno: Lead and Copper Monitoring Test Results (*) Collected between March 22nd and April 6th. 1999 Lead values (**): Copper values (**): Sample ID Lead (ppb) Sample ID Copper (ppb) 816 QT wi. 825 293.2 813 26.3 812 166.5 835 23.43 809 149.6 106 47.0 601 134.3 807 : 12.8 805 12.0...3. 856 12,2 107 112.6 820 11.0 -(90 percentile) -807 100.0 826 TB 820 ee 6) 809 7.8 835 88.9 602 7.4 816 69.4 831 6.6 831 59.8 601 6.6 847 53.6 846 5.7 824 50.4 605 5.6 836 47.7 815 S25 810 42,0 840 5.5 808 36.6 858 5.4 844 36.3 842 Seed 605 36.0. 847 4.9 814 36.0 827 4.5 104 32.0 819 4.0 106 32.0 837 4.0 826 31.5 825 Set 852 29nd 812 3.5 101 29.0 823 3.4 815 27.3 103 32 843 24.8 841 cya 813 24.0 852 epee 838 22.7 811 2.8 841 20.6 844 Zn6 104 23 107 2.2 28 ea.# at <2.0 31 ea.# at <20.0 (*) recorded values enclosed | (**) values are listed from the highest to the lowest. xxxEND_PAGE:deq02_b216_2370_2887_190 VIRGIN ISLANDS WATER AND POWER AUTHORITY le Ga. P.O, Box 1450, 5T, THOMAS VIRGIN ISLANDS, U, 6. A. 00804 ~ 1450 2000 TELEPHONE: (340) 774-3562 FAX1 (340) 776-2723 February 25th. Harold Mark Department of Planning and Natural Resources Division of Environmental Protection Government of the Virgin Islands 1118 Water Gut Homes Christiansted St. Croix; Vel» 00820 Dear Mr. Mark, Enclosed please find the calculated 90th percentile values of Lead and Copper content in the St. Thomas Distribution system, located in category Tier 3. O£ the 60 sample sites 23 (38.3%) were collected from the same locations as in Spring/99 sample collection. Statistical account for the 60 sample sites are as follows: 18 (30.0%) Single Family Resident (SFR) before 1983 14 with cisterns attached. 5 ( 8.3%) Single Family Resident (SFR) after 1982 3 with cisterns attached. 37 (61.7%) Multi Family Resident/Business/Office Bldg. 33 with cisterns attached. A total of 83.3% of the 60 sample sites were connected to a cistern. | xxxEND_PAGE:deq02_b216_2370_2887_191 H. Mark page 2 February 25th, 2000 Also attached is a map of the St. Thomas distribution system with sample site location. Please call me is you have any questions at 774-3552 ext. 2313. Sincerely, Annelise Knudsen Laboratory Supervisor cc: Martin Ramirez, Superintendent, Water Distribution Greg, Rhymer, Manager, Dept. of Environmental Affairs Carol Aubin, DPNR/DEP. St, Thomas | xxxEND_PAGE:deq02_b216_2370_2887_192 Lead and Copper Monitoring Test Results (*) Collected between January 11th. and February 3rd. 2000 Lead values (**): Copper values (**): i Sample ID Lead (ppb) Sample ID Copper (ppb) | 938 65.4 938 257.4 950 11.3 939 185.6 922 14.7 928 110.8 S57 11.8 $10 98.9 952 10.8 606 79.2 939 10.0 948 76.8 958 9.9 -({90 percentile) -949 74.4 606 6.4 917 73.1 i 959 5.7 920 63.9 i 910 4.9 947 58.7 944 4.5 952 57.5 937 3.9 S46 56.7 949 3.6 919 53.2 936 3.4 922 50.4 949 2.7 937 47.8 9303 2.6 916 46.4 926 2.0 936 41.8 944 39.5 951 34.3 903 30.2 718 29.5 950 28.2 909 25,0 932 21.4 43 ea.# ab «2.0 36 @a.# at <20.0 {*) recorded values enclosed. (**) values are listed from the highest to the lowest. xxxEND_PAGE:deq02_b216_2370_2887_193 ASMNISS VIRGIN ISLANDS Sire, WATER Wer EQS ano POWER wis” ~=AUTHORITY = P.0 BOX 1ah0. 81 THOMAS U.S. VIRGEN ISLANDS 00804-1450. TELEPHONE: (340) 774-3552 FAX, (340) 776 2723 March 7th, 2001 Harold Mark Department of Planning and Natural Resources Division of Environmental Protection Government of the Virgin Islands 1118 Water Gut Homes Christiansted St. Croix, V.I. 00820 Dear Mr. Mark, Enclosed please find the calculated 90th percentile values of Lead and Copper content in the St. Thomas Distribution system, located in category Tier 3. Reduced monitoring of 35 samples collected resulted in the following values (90 percentile) for Lead 6.2 ppb and for Copper 49.1 ppb. representing a deduction of 27% and 29% respectively from the values obtained in the February 2000 Lead and Copper monitoring. Statistical account for the 35 sample sites are as follows: 12 (34%) Single Family Resident (SFR) before 1983 1 ( 3%) Single Family Resident (SFR) after 1982 22 (63%) Multi Family Resident/Business/Office Bldg. The majority of the sites were connected to a cistern, Attached is a map of the St. Thomas Distribution system with sample site locations. Please call me if you have any questions at 774-3552 xt. 2313, Sincerely, “- e i . fea A Ge CA 2k, cae bee Cyt me, Annelise Knudsen Laboratory Supervisor cc: Martin Ramirez, Superintendent, Water Distribution Greg. Rhymer, Manager, Dept. of Environmental Affairs Anibal Bermudez, DPNR/DEP, St. Thomas BRANCH: P.O. BOX 1009, CHRISTIANSTED, ST. CROIX, U. S. VIRGIN ISLANDS 00820-1009 i | : | : | xxxEND_PAGE:deq02_b216_2370_2887_194 PSR OI OTe EEE TCA NE Sco shomanseraratetinite: bets cinta sons ernie ee SON SE St. Thomas Water Distribution System Lead and Copper Monitoring Test Results (*) Collected between January 23rd and February 16th 2001 Lead values (**) Copper values (**) Sample ID Lead (ppb) Sample ID Copper (ppb) 613 25.6 613 154.2 020 12.4 O02 95.5 618 411.1 Q24 86.4 021 6.2 {90th percentile) 017 49.1 620 6.1 021 47.3 024 3.5 018 40.2 010 Sei 612 35.3 934598 2.8 618 24.1 008 25 010 23.0 004 23 027 2,3 002 2.2 018 2 22 samples at < 2.0 26 samples at < 20.2 (*) wvecorded values énclosed (**) values are listed from highest to lowest. xxxEND_PAGE:deq02_b216_2370_2887_195 90 % Before - 0.108 ppm After - 0.011 ppm parts per million Desalination Unit # 1 Lead results 0.40 T 0.35 + 0,30 +- 0.25 + 0.20 + 0.10 + 0.05 + (0.00 45} 33,3 ane FE 1993-no treatment Ha 1999-SeaQuest TH-4 ALK-3 pH-67 xxxEND_PAGE:deq02_b216_2370_2887_196 90 % Before 0.021 - ppm After - 0.014 parts per million Desalination Unit # 2 Lead results 0.20 T 0.18 + 0.16 a 0.14 + 0.124 7 0.104 0.08 + 0,04 0.02 +- E23 1993 - No treatment 1999- SeaQuest TH-1 ALK-3 pH-67 ' ' i i xxxEND_PAGE:deq02_b216_2370_2887_197 90% Before 0.948 ppm After - 0.1 ppm parts per million 5.0 + 4.5 | 4,0 | 3.5 7 3.0 + 2.5 + 2.0 + 1.5 + Desalination Unit # 1 Copper results 1993-no treatment 3 1999-SeaQuest TH-1 ALK-3 pH-67 xxxEND_PAGE:deq02_b216_2370_2887_198 90 % Before - 0.3 88 ppm After - 0.227 ppm Desalination Unit # 2 Copper results 0.8 0.7 0.6 poh re) ) 1 t () uo} it Jad syed 0.3 + 0.1 + EZ 1999- SeaQuest [22 1993 - No treatment TH-1 ALK-3 pH-67 xxxEND_PAGE:deq02_b216_2370_2887_199 CITY OF NEWBERRY GEORGE HUGH CONNELLY WATER TREATMENT PLANT $2] Highway121 + Sitverstreet, South Carolina 29146 Michael Rdelstein, National Sales and Development Manager Aquz Smart, Inc . 4445 Commerce Drive Atlanta, GA 30336 May 24, 2003 Dear Mr. Edelstein, After using Seaquest for over one year, we have noticed the following changes in our system. 1, We've lowered our pH from 7.8-8.0 to 6,5 without any negative results, Our water quality is excellent. 2, We've reduced our caustic usage by 75%, 3, We've reduced our chlorine usage by 22%. 4, We've gotten off of chloramines and stopped using ammonia for better water quality. 3, Inthe year that we've been using SeaQuest, we've only had one limited outbreak of red water, which ‘was caused by a sudden spike of mental and orgenics in cur system, which cleared up very quickly, Serene v0 ne Len Sod sraner-coenplatats, went peovloesty; ie yee Rayesthons ast Ay #0 : 6. ‘We've reduced our flushing considerable (in some areas every few months) to just once a year. | 7. We've visibly seen reduotion of corrosion and scale, 8. We've had an increase in chlorine residuals in our system. 9. Oar TYHMs average is 26% lower. 10, Our HAA average is stable. 11, Our lead and copper results pasted for viva reduced monitoring. “ Since we' ve been on SeaQuest, we have improved our overall water quality as stated using far less. chemical in our water with better results and have saved the City of Newberry, SC a considerable | amount of money. Thank you for a great product. | David Hendrix Superintendent | Phone (B03) 276-0311. + “FAX (803) 276-0312 xxxEND_PAGE:deq02_b216_2370_2887_200 City of Greer, SC Tony Green, Water Plant Manager 864-848-5527 (MARCH 38, 2002 — APRIL 6, 2002) Monitoring of 13 weekly samples taken in distribution for residual chlorine. This is the result from the dead end line of the 13 weekly samples. SeaQuest in use for the first 4 weeks! 1. Monitoring Results - First Week (MARCH 3 - 9, 2002) 0.05 This is a dead end line and has averaged this residual for 5 years! 2. Monitoring Results - Second Week (March 10 - 16, 2002) 0.05 Same dead end line SEA QUEST PUT INTO SYSTEM THIS WEEK 3. Monitoring Results - Third Week (March 17 - 23, 2002) 0.13 Same dead end line Nothing different treatment wise other than adding SEA QUEST (NO flushing was done to this line!) Cut Chlorine from 3 mg/L to 2.6 mg/L and Ammonia ratio from 4 to 1 to 5 to 1 (dropped from 90 Ibs to 70 Ibs per week) 4. Monitoring Results - Fourth Week (March 24 - 30, 2002) 0.60 Same dead end with the exception of feeding SEA QUEST (Still no flushing) 5. Monitoring Results — Fifth Week (APRIL 1 - 6, 2002) 0.94 Same dead end but now SEA QUEST has been in use approximately 4 weeks (With no flushing at this fine!) | | | | | | xxxEND_PAGE:deq02_b216_2370_2887_201 City of Greer, SC Tony Green, Water Plant Manager 864-848-5527 MEMORANDUM