CONG TY CO PHAN cap NUOC BAC LIEU CQNG HOA XA HQI CHU NGHiA Vl T NAM DQc l~p - TV do - H~nh phuc S6: ~hibc-cty Bq.c Lieu, ngayjothangdo ndm 2018 BAocA

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1 CONG TY CO PHAN cap NUOC BAC LIEU CQNG HOA XA HQI CHU NGHiA Vl T NAM DQc l~p - TV do - H~nh phuc S6: ~hibc-cty Bq.c Lieu, ngayjothangdo ndm 2018 BAocAo ( Chat hrong mroc Thang 09/2018) Kinh gui: Trung tam kiem scat benh t~t ( trung tam y ts du phong ) tinh B;;tcLieu. Can cir thong tu 50/2015/TT-BYT ngay 11 thang 12 nam 2015 quy dinh viec kiem tra v~ sinh, ch~t hrong mroc an uong, mroc sinh heat cua BQY ts. Nay Cong ty c6 phan C~p mroc Bac Lieu bao cao viec kiem tra ve sinh, ch~t hrong nuoc an uong, mroc sinh hoat tai co sa voi cac noi dung nhir sau: A. THONG TIN CHUNG 1. Ten co sa cung c~p nuoc: Cong ty c6 phan C~p mroc Bac Lieu. 2. Dia chi: S6 92, duong Le Duan, phirong 1, tp Bac Lieu, tinh Bac Lieu. 3. Cong su~t thiet ks: m31 ngay demo 4. T6ng s6 dan diroc cung c~p nuoc: Khoang hq 4. Nguon mroc nguyen lieu: Nguon nuoc duoc khai thac tir 08 gieng khoan nam trong nqi a thanh ph6 B;;tcLieu sau do duq'ctruysn tai vs 2 nha may xu I;' nuac ds xu 1;'. B. KET QuA KIEM TRA 1.K~t qua ki~m tra tinh tr~ng v~ sinh 1.1. Tinh tr;;tngv~ sinh ngu6n nuac nguyen Ii~u: Cong ty Iuon quan tam dsn v~n ds v~ sinh khu VlJC xung quanh cac gisng khai thac nuac ng&m, khu VlJC nha may xu I;' nuac va dam bao v~ sinh. Khong co nguy co gay a nhism anh huang dsn ngu6n nuac khai thac Tinh tr;;tngv~ sinh ngo;;ticanh co sa c~p nuac: Khong bi anh huang bai cac tac nhan ngo;;ticanh nao trong co sa cung c~p nuac Tinh tr;;tngv~ sinh h~ th6ng san xu~t nuac : Dinh ky hang thang cong ty b6 tri cong nhan v~ sinh h~ th6ng bs lqc, cham Clo dung dinh Iuqng dam bao h~ th6ng san xu~t nuac hqp v~ sinh, dung qui trinh san xu~t nuac, khong lam anh huang gi dsn cac khu VlJC xung quanh. 2. K~t qua xet nghi~m nrro'cthimh ph m trong thang 2.1. S6 mfiu, thai gian, t&nsu~t xet nghi~m: S6 mfiu, thai gian, t&nsu~t xet nghi~m do Cong ty th\fc hi~n: - Nha may nuac s6 01: + S6 mfiu: 04 mfiu;

2 r. + Thai gian va t~n suat xet nghiem: 1 tuan II m.u - Nha may mroc s6 02: + S6 m.u:04 m.u; + Thai gian va t~n suat xet nghiem: 1 tu~n II m.u S6 m.u, thai gian, dn suat xet nghiem do Trung tam Y ts du phong thirc hien: - Nha may nuoc s6 01: 01thang/ 0 1 l~n lay m~u xet nghiem ly hoa, vi sinh. - Nha may nuoc s6 02: 01thang/ 0 1 l~n l~y m~u xet nghiem ly hoa, vi sinh. - Tai cac diem cuoi nguon: 01 thang/of l~n l~y m.uxet nghiem vi sinh KSt qua xet nghiem: - Ttmg s6 m.udat quy chuan QCVN 01: 2009IBYT : 05 m.u. Ty 1~m.udat quy chu~n: 50 % - T6ng s6 m.ukhong dat quy chu~n: 05 m.u Trong do: + S6 m.ukhong dat v6 ly, hoa hoc: 05 m.u( Nha may nuoc s6 01 ) + S6 m.ukhong dat v6 vi sinh vat: 0 miu - Cac chi tieu khong d~t g6m : )i;)cling t6ng ci;)ng( Nha may nuac s6 01 ). KSt qua xet nghi~m di;)cung t6ng ci;)ng(tb) la 329 mg/i. Cao hon tieu chu~n cho phep ( tieu chu~n <= 300 mg/l ). Thui;)cm.unuoc diu ngu6n t~i bs chua nuoc s~ch ( nuoc dff qua xu ly ). 3. Cae bi~n phap kh~c ph1}c: Hi~n nay cong ty giam thai gian 141aithac cua gisng nuac tho co di;)cling cao t~i Nha may nuoc s6 1. Tuy nhien di;)cung t~i Nha may nuoc s6 2 thap hon so vai QCVN 01: 20091BYT, d6ng thai ngu6n nuoc ngoai m~ng da duq'choa m~ng do h~ th6ng m~ng 6ng nuoc la m~ng vong do v~y (1<) cling ngoai m~ng th~p hon so voi kst qua t~i nha may nuoc s Nhin xet: - Chat luqng nuoc cong ty dang cung cap cho nhan dan thanh ph6 B~c Lieu ca ban d~t voi quy chu~n QCVN 01: 20091BYT. - Ap I\fC a m~ng luoi cap nuoc t~i nhfrng dism xa nhat, bat lq'inhat cling dam bao. Nui nh~n: - Nhu kinh gui; - Luu: VP CTY

3 C.TY co PHAN cap NVOC B~C LIEU xi NGHI~P san XUAT NUOC Si).CH Kiem soat Ian: 7.. CQNG HOA xx HQI CHU NGHiA VI~T NAM Doc UlP - Tu Do - Hanh Phuc Bac Lieu, ngay 04 thang 09 nam 2018 _ PHIEU KET QUA XET NGHI:E:M Loai mau xet nghiem : NucYC dii xu Iy Dja chi I~y m&u: Nha may nuoc s6 01, se 92, Ie DLI~n,PI, TPBL Noi xet nghiem : phong xet nghiem Tinh trang kiem nghiem : m&u dung trong chai nhua Nhan m&u : ngay 04 thang 09 nam 2018 Ki~m tra m&u: ngay 04 thang 09 nam 2018 KET QuA T~I PHONG XET NGHI~M STT CHi TIEU PHU'ONG PHAp THU A A? TIEUCHUAN QCVN 01:2009/BYT 1 DQ mau SMEWW- A 15 TCU 6TCU 2 Mui SMEWW - A Kh6ng mul vi Khong mui vi 3 Vi SMEWW - A Kh6ng c6 vi I~ Kh6ng vi la 4 ph PH 100 Ph/mY-Meter _._.--,:-:---::-, _ D9 cung tong cong S_ME_W_W_-_A +- <_=_30_0_m_g/_1 +- 3~~~~~~_J 6 Ham LUQng clorua SMEWW - A <=300 mg/l 120 mq/i I 7 Chi s6 pecmanganat SMEWW - A <= 2 mg/l O.~ m~!!_j 8 Ham hrong Mangan HACH DRl900 <= 0.3 mg/l mg/i t---:-::-:-----:-----:--::-_: --t ~ 9 Ham hrong Nitrite HACH DRl900 <=3 mg/l mg/l 10 Ham luong Nitrate HACH DRl900 ' <=50 mg/l 7.7 mg/l 11 Ham luong sulphat HACH DRl900 <= 250 mg/l 70 rng/l I :---,---,---.,----,-t-----,--~~ :_::_:c_: - f------_i Ham luong sat tong s6 HACH DRl900 <= 0.3 mg/l 0.08 mg/l r-~--t-~~------t---~~~~~_: -_,---, ~~~-~ ~~7~-- 13 DQ due HACH 2IOON 2 NTU NTU I----+~ t---~,---~~~~_: -_,--~~-:-- :~ Clor du HACH DRl900 OJ mg/l OJ6 mg/l ~_--'- J.... -' ' Nh~n xet : M u co chi tieu oq cung t&ng cqng cao hon tieu chu n QCVN 01:2009IBYT. Ghi chu : K~t qua ( NQi ki~m ) chi co gia tri tren m u thi'r, va chi NIlANVI~V luu himh trong noi bq. - I- Nguyen Quoc Anh

4 C.TY co PHAN cap nuoc B~C LIEU xi NGHI~P SAN XUAT NUOC S~CH Kiem scat Ian : ]. CQNG HOA xx HQI CHU NGHiA VI~T NAM DOcUip - Trr Do - Hanh PhUc Bac Lieu, ngay 11 thang 09 nam 2018 PHIEU KET QUA XET NGHIEM Loai m~u xet nghiem : Nurre dii xu Iy Dja chi I~y m~u: Nha may nuoc 56 0 I, s6 92, Ie Du~n, PI, TPBL Noi xet nghiem : phong xet nghiem Tinh trang ki~m nghiem : m~u dung trong chai nhua Nhan m~u : ngay II thang 09 nam 2018 Ki~m tra m~u: ngay II thang 09 nam 2018 KET QuA T~I PHONG XET NGHIJtM h h? TIEUCHUAN STT CHiT[EU phu'ongphapthu QCVN KETQUA 01:20091BYT ] Domau SMEWW-A 15 TCU 7TCU 2 Mui SMEWW -A Khong mul vi Khong mui vi 3 Vi SMEWW -A Khong co vi I? Khong vi I~ 4 ph PH 100 Ph/mY-Meter Do cirng tong cong SMEWW-A <=300 mg/l 330 mg/l 6 Ham Luong clorua SMEWW-A <=300 mg/l 92 mg/l 7 Chi s6 pecmanganat SMEWW-A <= 2 mg/l 0.4 mg/l 8 Ham luong Mangan HACH DR/900 <= 0.3 mg/l mg/l 9 Ham IUQngNitrite HACHDR/900 <=3 mg/l mg/l 10 Ham luong Nitrate HACH DR/900 <=50 mg/l 7.9 mg/l 1] Ham IUQngsulphat HACH DR/900 <= 250 mg/l 52 mg/l ]2 Ham IUQngsat tong s6 HACH DR/900 <= 0.3 mg/l 0.07 mg/l 13 Do due HACH 2100N 2NTU 0.148NTU 14 Clor du HACH DR/ mg/l 0.33 mg/l - Nh~n xet : M.u c6 chi ticu o{i cirng tbng c{ing cao hon tieu chuan QCVN 01:2009IBYT. - Ghi chu : K~t qua ( N{iiki~m ) chi c6 gia tri tren m.u thl'r, va chi Irru Mnh trong noi bq. NHANVIE M Nguy~n Quac Anh

5 C.TY CO PHAN capmroc B..:\CLIEU xi NGHI~P SAN XUAT NUOC S~CH Kiem scat Ian : 2_ CONG HOA xa HOI CHU NGHiA VI~T NAM Doe Lap - Tu Do - Hanh Phue Bac Lieu, ngay 19 thang 09 nam 2018 PHIEU KET QUA XET NGHI~M Loai mfiu xet nghiem : Niroc cia xu 19 Dia chi I~y mfiu: Nha may mroc s6 01, se 92, Ie Duan, PI, TPBL Noi xet nghiem : phong xet nghiern Tinh trang ki m nghiern : mfiu dung trong chai nhua Nhan mfiu : ngay 19 thang 09 nam 2018 Ki m tra mfiu: ngay 19 thang 09 nam 2018 KET QuA T ~I PHONG XET NGH1:t::M STT CHiTIEU PHUONGPHA.PTHU A A' TIEUCHUAN QCVN 01:2009!BYT 1 )9 mau SMEWW-A 15 TCU 7TCU 2 Mui SMEWW-A Khong mui vi Kh6ng mui vi 3 Vj SMEWW-A Khong c6 vi 1<;\ Khong vi la 4 ph PH 100 Ph/mV-Meter )9 cirng tong cong SMEWW -A <=300 rng/l 332 mg/l 6 Ham Luong clorua SMEWW -A <=300 mg/l 96 mg/l 7 Chi so pecmanganat SMEWW -A <= 2 mg/l 0.6 mg/l 8 Ham luong Mangan HACH DRJ900 <= 0.3 mg/l 0.02 mg/l 9 Ham luong Nitrite HACH DRJ900 <=3 mg/l mg/l 10 Ham luong Nitrate HACH DR/900 <=50 mg/l 7.1 mg/l 11 Ham luong sulphat HACH DRJ900 <= 250 mg/l 56 mg/l 12 Ham hrong sat tong so HACH DR/900 <= 0.3 mg/l 0.07 mg/l 13 >9 due 14 Clor du HACH 2100N HACHDR/900 2NTU mg/i 0.173NTU 0.39 mg/l Nh~n xet : Mftu c6 chi tieu dq cimg tang cqng cao hon tieu chuan QCVN 01:2009!BYT. Ghi chii : K~t qua ( NQi ki~m ) chi c6 gia tr] tren mftu thir, va chi luu himh trong noi bq. BAN GIA.M DOC XN NHAN VIEN XET ~ ~ Nguy~n QuAe Anh

6 C.TY CO PHAN cap inroc B~C LIEU xi NGHI.t::P san XUAT NUOC S~CH Kiem soat Ian : L CONG HOA XA HOI CHiJ NGHiA VI.t::TNAM Doc Lap - Tu Do - Hanh Phuc B<.1cLieu, ngay 25 thang 09 nam 2018 PHIEU KET QUA XET NGHI~M LO<.1i m~u xet nghiem : Nuoc dll xu Iy Dia chi Ifry m~u: Nha may nuoc s6 01, S692, Ie Du~n, PI, TPBL NO'i xet nghiem : phong xet nghiem Tinh trang kiern nghiern : m~u dung trong chai nhua Nhan ll1~u : ngay 25 thang 09 nam 2018 Ki~m tra m~u: ngay 25 thang 09 nam 2018 KET QuA T ~I PRONG XET NGRIJtM STT CHiTIEU PHUONG PHAp THU A A? TIEUCHUAN QCVN 01:2009IBYT 1 )<) mau SMEWW- A 15 rcu 6TCU 2 Mui SMEWW - A Kh6ng rnui vi Kh6ng mui vi 3 Vi SMEWW - A Kh6ng c6 vi I? Kh6ng vi 1<.1 4 ph PH 100 Ph/mV-Meter ~~--~-----, ~-----~~~~ ~ )(i cling tong cong SMEWW - A <=300 mg/l 340 mg/l 6 Ham Luong clorua SMEWW - A <=300 mg/l 118 mg/l ~~--~~~ ~--~~-=~~~----~ r Chi so pecmanganat SMEWW - A <= 2 mg/l 0.8 mg/l ~ ~ ~----~ r Ham IUQngMangan HACH DRl900 <= 0.3 mg/l mg/l 9 Ham hrong Nitrite HACH DRl900 <=3 mg/l mg/l 10 Ham luong Nitrate HACH DRl900 <=50 mg/l 7.9 mg/l 11 Ham hrong sulphat HACH DRl900 <= 250 mg/l 60 mg/l 12 Ham IUQngsat tong s6 HACH DR/900 <= 0.3 mg/l 0.08 mg/l 13»e due HACH 2100N 2 NTU NTU 14 Clor du HACH DRl mg/i 0.3 mg/l Nh~n xet : M u co chi tieu dq cung tang cqng cao ho'n tieu chu n QCVN 01:2009IBYT. Ghi chu : K~t qua ( NQi ki~m ) chi co gia tr] tren m u thir, va chi hru hanh trong noi bi). NIIANVIE~ Nguy~n Quac Anh

7 C.TY CO PHAN capmroc BAC LIEU xi NGHI~P SAN XUAT NU6'C S~CH Kiem soat Ian :... CONG HOA XA HOI CHU NGHiA VIET NAM Doc Hip - Tu Do - Hanh Phuc Bac Lieu, ngay 04 thang 09 nam 2018 PHIEU KET QUA XET NGHI~M Loai mdu xet nghiem: Nuoc da xlr Iy Dia chi Ih mdu : Nha may nuoc 56 02, Duy Tan, P5, TPBL Noi xet nghiem : phong xet nghiem Tinh trang kiem nghiem : m~u dung trong chai nhua Nhan m~u : ngay 04 thang 09 nam 2018 Ki~m tra m~u : ngay 04 thang 09 nam 2018 KET QuA T ~I PHONG XET NGHI~M STT chitieu PHUONGPHApTHU TIEU CHUAN QCVN 01:20091BYT KET aua 1 89 mau SMEWW-A 15 TCU 6 TCU 2 Mui SMEWW -A Kh6ng rnui vi Kh6ng rnu: vi 3 Vi SMEWW -A Kh6ng c6 vi la Kh6ng vi I~ 4 ph PH 100 Ph/mY-Meter cung tong cong SMEWW -A <=300 mgtl 234 mgtl 6 Ham Luong clorua SMEWW -A <=300 mgtl 76 mg/i 7 Chi 56 pecmanganat SMEWW -A <= 2 mgtl 0.6 mgtl 8 Ham IUQngMangan HACH DRJ900 <= 0.3 mgtl mgtl 9 Ham IU'QngNitrite HACHDRJ900 <=3 mgtl mgtl 10 Ham IU'QTIgNitrate HACH DRJ900 <=50 mgtl 7.7 mgtl 11 Ham IU'QTIgsulphat HACH DRJ900 <= 250 mgtl 60 mgtl 12 Ham IUQngsat tong s6 HACHDRJ900 <= 0.3 mgtl 0.11 mgtl due HACH 2100N 2NTU NTU 14 Clor duo HACH DRJ mg/l 0.32 mgtl Nh~n xet : Cac chi tieu tren ciia miu co chi s6 d~t theo tieu chuan QCVN 01:2009IBYT. Ghi chu : K~t qua ( NQi ki~m ) chi co gia tr] tren miu thir, va chi hru hanh trong noi bq. Nguy~n Qu6c Anh

8 _ C.TY co PHAN cap Nude BAC LIEU xi NGHI. P san XUAT NlfOC S~CH Kiem scat Ian : CQNG HOA XA HQI CHU NGHiA VIItT NAM Doc Lap _ TU'Do _ Hanh Phuc B~c Lieu, ngay 11 thang 09 nam 2018 PHIEU KET QUA XET NGHI:E:M Loai m u xet nghiem: Nuoc dll XlI" ly Dia chi l~y m u : Nha may nuoc s6 02, Duy Tan, P5, TPBL Noi xet nghiem : phong xet nghiem Tinh trang ki~m nghiem : m u dung trong chai nhua Nhan mfru : ngay 11 thang 09 narn Ki~1l1 tra mfru : ngay 11 thang 09 nam 2018 KET QuA T ~I PHONG XET NGHlItM STT chitieu PHlfONGPHApTHU TIEU CHUAN QCVN 01:2009IBYT KET QUA 1 8(> mau SMEWW-A 15 TCU 8 lcu 2 Mui SMEWW-A Khong rnui vi Khong mui vi 3 Vi SMEWW-A Khong c6 vi 1(,\ Kh6ng vi I~ 4 ph PH 100 Ph/mY-Meter (> cirng tong cong SMEWW-A <=300 mg/i 242 mg/i 6 Ham LUQng clorua SMEWW-A <=300 mg/i 68 mg/i 7 Chi s6 pecmanganat SMEWW-A <= 2 mg/i 0.6 mg/i 8 Ham IUQTIgMangan HACHDRl900 <= 0.3 mg/i mg/i 9 Ham IUQngNitrite HACH DRl900 <=3 mg/i mg/i 10 Ham IUQngNitrate HACH DRl900 <=50 mg/i 6.3 mg/i 11 Ham IUQTIgsulphat HACH DRl900 <= 250 mg/i 82 mg/i 12 Ham IUQngsat tong s6 HACH DRl900 <= 0.3 mg/i 0.09 mg/i 13 8(> due HACH 2100N 2NTU NTU 14 Clor du HACH DRl mgll 0.3 mg/i Nh~n xet : Cac chi tieu tren ciia m u co chi s6 Ol}-t theo tieu chuan QCVN 01:2009IBYT. Ghi chu : K t qua ( NQi ki~m ) chi co gia tr] tren m u thif, va chi hru hanh trong noi bq. NHAN Vlli:N XET7 ~ Nguy~n Qu6c Anh

9 C.TY CO PHAN cap NV6c B~C LIEU xi NGHI~P san XUAT NUaC S~CH Kiem scat Ian :... CONG HOA XA HOI CHU NGHiA VIET NAM Doe L!lP - Ttl Do - Hanh Phue Bac Lieu, ngay 19 thang 09 nam 2018 PHIEU KET QUA XET NGHI~M Loai mfru xet nghiem: NUQ-cda XLI" Iy Dja chi I.ymfru : Nha may nuoc s6 02, Duy Tan, P5, TPBL Noi xetnghiem : phong xet nghiem Tinh trang kiem nghiem : mfru dung trong chai nhua Nhan mfru : ngay 19 thang 09 nam 2018 Ki~m tra mfru : ngay 19 thang 09 nam 2018 KET QuA T~I PHONG XET NGHI~M ~ ntu CHUAN STT CHiTIEU PHUONG PHA.P THU QCVN KEl aua 01:20091BYT 1 8(> mau SMEWW-A 15 lcu 7 TCU 2 Mui SMEWW-A Khong mul vi Khong rnul vi 3 Vi SMEWW -A KhOng c6 vi I~ Khong vi I~ 4 ph PH 100 Ph/mY-Meter (> cling tong cong SMEWW-A <=300 mg/l 232 mg/l 6 Ham Luong clorua SMEWW-A <=300 mg/l 72 mg/l 7 Chi so pecmanganat SMEWW -A <= 2 mg/l 0.6 mg/l 8 Ham luong Mangan HACH DR/900 <= 0.3 mg/l mg/l 9 Ham luong Nitrite HACH DR/900 <=3 mg/l mg/l 10 Ham hrong Nitrate HACH DRJ900 <=50 mg/l 6.7 mg/l II Ham IUQngsulphat HACH DRJ900 <= 250 mg/l 80 mg/l 12 Ham IUQngsat tong so HACH DRJ900 <= 0.3 mg/l 0.12 mg/l 13 8(> due HACH 2100N 2NTU NTU 14 Clor du HACH DRJ mg/i 0.3 mg/l Nh~n xet : Cac chi tieu trsn ciia mfiu co chi s6 d~t theo tieu chuin QCVN 01:2009IBYT. Ghi chii : K t qua ( NQi ki~m ) chi co gia tr] tren m u thir, va chi luu hanh trong noi bi). BAN GIA.M DOC XN

10 .- C.TY CO PHAN cap NVOC B~C LIEU xi NGHI,E:P san XUAT Nudc S~CH Kiern soat Ian : 2 CONG HOA XA HOI CUU NGHIA VIJ!:TNAM Doc Lap - Tlf Do - Hanh Phuc Bac Lieu, ngay 25 thang 09 nam 2018 PRIED KET QUA XET NGRI~M Loai m~u xet nghiem: Niroc da xu 1y Dja chi lay I11~U : Nha may nuoc s6 02, Duy Tan, P5, TPBL Noi xet nghiem : phong xet nghiern Tinh trang kiem nghiem : m~u dung trong chai nhua Nhan m~li : ngay 25 thang 09 nam 2018 Ki~m tra I11~U : ngay 25 thang 09 nam 2018 KET QuA T~I PHONG XET NGHltM A' TIEU CHUAN STT CHiTIEU PHUONG PHAp THU QCVN KETaUA 01:20091BYT 1 )9 mall SMEWW-A 15 TCU 7 TCU 2 Mui SMEWW-A Khong rnui vi Khong rnui vi 3 Vi SMEWW-A Khong c6 vi I~ Khong vi la 4 ph PH 100 Ph/mV-Meter D9 cling tong cong SMEWW-A <=300 mg/l 236 mg/l 6 Ham Luong clorua SMEWW-A <=300 mg/l 94 mg/l 7 Chi so pecmanganat SMEWW-A <= 2 mg/l 0.8 mg/l 8 Ham hrong Mangan HACHDRJ900 <= 0.3 mg/l mg/l 9 Ham luong Nitrite HACH DRJ900 <=3 mg/l 0.116mg/l 10 Ham luong Nitrate HACH DRJ900 <=50 mg/l 6.3 mg/l 11 Ham IUQTIgsulphat HACH DRJ900 <= 250 mg/l 78 mg/l 12 Ham IUQngsat tong so HACH DRJ900 <= 0.3 mg/l 0.08 mg/l 13 )9 due HACH 2100N 2NTU NTU 14 Clor duo HACH DRJ mg/l 0.32 mg/l Nh~n xet : Cac chi tieu tren ciia mliu co chi s3 d:_tttheo tieu chuan QCVN 01:2009/BYT. Ghi chu : K~t qua ( NQi ki~m ) chi co gia tr] tren mliu thir, va chi luu hanh trong noi bq. Nguy~n Qu3c Anh